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Corrigendum to: Significance of entropy generation and the Coriolis force on the three-dimensional non-Darcy flow of ethylene-glycol conveying carbon nanotubes (SWCNTs and MWCNTs) J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2024-03-12 Ikram Ullah, Tasawar Hayat, Arsalan Aziz, Ahmed Alsaedi
This corrigendum addresses some typographical mistakes and errors in published article “Significance of entropy generation and the Coriolis force on the three-dimensional non-Darcy flow of ethylene-glycol conveying carbon nanotubes (SWCNTs and MWCNTs)”. Corrections about some typographical errors and plots of g η $g\left(\eta \right)$ satisfying ambient condition in study (I. Ullah, T. Hayat, A. Aziz
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On the dynamic thermal conductivity and diffusivity observed in heat pulse experiments J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2024-03-11 Anna Fehér, Róbert Kovács
Determining the thermal properties of materials with complex structures is still a major engineering challenge today. The well-known heat pulse experiment can be used to determine the thermal diffusivity by measuring the temperature history as a thermal response for a fast excitation. However, the evaluation of the measurements can be challenging, especially when dealing with non-homogeneous samples
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Optimization analysis of an endoreversible quantum heat engine with efficient power function J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2024-02-14 Kirandeep Kaur, Anmol Jain, Love Sahajbir Singh, Rakesh Singla, Shishram Rebari
We study the optimal performance of an endoreversible quantum dot heat engine, in which the heat transfer between the system and baths is mediated by qubits, operating under the conditions of a trade-off objective function known as the maximum efficient power function defined by the product of power and efficiency of the engine. First, we numerically study the optimization of the efficient power function
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Modeling equilibrium and non-equilibrium thermophysical properties of liquid lubricants using semi-empirical approaches and neural network J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2024-02-08 Sayed Mostafa Hosseini, Taleb Zarei, Mariano Pierantozzi
This study explored the capability of semi-empirical and neural network approaches for correlating and predicting some equilibrium and non-equilibrium thermophysical properties of liquid lubricants. The equilibrium properties, including the densities and several thermodynamic coefficients for 12 liquid lubricants, were correlated and predicted through a perturbed hard-chain equation of state (PHC EoS)
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Hydrodynamic, electronic and optic analogies with heat transport in extended thermodynamics J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2024-01-26 Vito Antonio Cimmelli, David Jou, Antonio Sellitto
Over the last twenty-five years, the search for generalized equations that allow us to better understand the phenomenon of heat conduction has become an active frontier both in transport theory, and in non-equilibrium thermodynamics, due to the growing interest in nanotechnologies, thermal metamaterials and fast devices. Here we review how some mathematical analogies between generalized heat-transport
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Thermodynamic costs of temperature stabilization in logically irreversible computation J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2024-01-26 Shu-Nan Li, Bing-Yang Cao
In recent years, great efforts are devoted to reducing the work cost of the bit operation, but it is still unclear whether these efforts are sufficient for resolving the temperature stabilization problem in computation. By combining information thermodynamics and a generalized constitutive model which can describe Fourier heat conduction as well as non-Fourier heat transport with nonlocal effects,
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Optimized quantum drift diffusion model for a resonant tunneling diode J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2024-01-23 Orazio Muscato, Giovanni Nastasi, Vittorio Romano, Giorgia Vitanza
The main aim of this work is to optimize a Quantum Drift Diffusion model (QDD) (V. Romano, M. Torrisi, and R. Tracinà, “Approximate solutions to the quantum drift-diffusion model of semiconductors,” J. Math. Phys., vol. 48, p. 023501, 2007; A. El Ayyadi and A. Jüngel, “Semiconductor simulations using a coupled quantum drift-diffusion schrödinger-Poisson model,” SIAM J. Appl. Math., vol. 66, no. 2,
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Thermodynamics of micro- and nano-scale flow and heat transfer: a mini-review J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2024-01-22 Yangyu Guo, Moran Wang
The modeling and understanding of micro- and nano-scale transport processes have raised increasing attention and extensive investigation during the past decades. In this mini-review, we aim to summarize our recent progress on the non-equilibrium thermodynamics of micro- and nano-scale flow and heat transfer. Special emphasis is put on the entropy generation at the interface, which plays a dominant
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Revisit nonequilibrium thermodynamics based on thermomass theory and its applications in nanosystems J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2024-01-22 Renjie Hua, Yuan Dong
The development of non-Fourier heat conduction models is encouraged by the invalidity of Fourier’s law to explain heat conduction in ultrafast or ultrasmall systems. The production of negative entropy will result from the combination of traditional nonequlibrium thermodynamics and non-Fourier heat conduction models. To resolve this paradox, extended irreversible thermodynamics (EIT) introduces a new
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Heat transfer within nonequilibrium dense aluminum heated by a heavy ion beam J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2024-01-22 Chiwan Song, Seongmin Lee, Woosuk Bang
Energetic laser-accelerated ions can heat a small solid-density sample homogeneously to temperatures over 10,000 K in less than a nanosecond. During this brief heating time, the electron temperature of the sample rises first, and then the ion temperature increases owing to the heat transfer between the hot electrons and cold ions. Since energy deposition from the incident heavy ion beam continues concurrently
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Thermal and electrical properties of photovoltaic cell with linear phenomenological heat transfer law J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2024-01-05 Jun Li, Lingen Chen
The thermal and electrical properties of photovoltaic cell (PVC) under linear phenomenological heat transfer law between it and the environment is studied through finite time thermodynamics and the volt-ampere characteristic equation. The properties of PVC are affected by heat transfer between PVC and environment. There are optimal solar radiation intensity and PVC output voltage (OV), which make the
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Strategies to improve the thermal performance of solar collectors J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2024-01-05 Bader Alshuraiaan
The paper evaluates a passive method for heat transfer improvement in heat exchangers, which implies the use of nanofluids. All calculations were carried out with a constant volumetric flow rate. The study examines three fluids with 0–4 % volume concentrations of CuO, MgO, and Al2O3 particles. The results indicate an increase in the heat transfer coefficient with increasing temperature. An Al2O3 nanofluid
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On the influence of the fourth order orientation tensor on the dynamics of the second order one J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-12-16 Christina Papenfuss
The consequences of introducing the fourth order orientation tensor as an independent variable in addition to the second order one are investigated. In the first part consequences of the Second Law of Thermodynamics are exploited. The cases with the second order alignment tensor in the state space on one hand and with the second and fourth order alignment tensors on the other hand are analogous. In
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Onsager-Casimir reciprocal relations as a consequence of the equivalence between irreversibility and dissipation J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-12-14 Václav Klika, Sylvain D. Bréchet
The equivalence between irreversibility and dissipation entails that the Onsager reciprocal relations hold unconditionally, requiring the part of the phenomenological matrix describing dissipative phenomena to be symmetric. The antisymmetric part of the phenomenological matrix corresponds to the Casimir’s variant of the reciprocal relations and describes reversible phenomena. Further, we discuss the
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Buoyancy driven convection with a Cattaneo flux model J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-12-14 Brian Straughan, Vincenzo Tibullo, Francesca Passarella
We review models for convective motion which have a flux law of Cattaneo type. This includes thermal convection where the heat flux law is a Cattaneo one. We additionally analyse models where the convective motion is due to a density gradient caused by a concentration of solute. The usual Fick’s law in this case is replaced by a Cattaneo one involving the flux of solute and the concentration gradient
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Relativistic hydrodynamics from the single-generator bracket formalism of nonequilibrium thermodynamics J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-12-05 Vlasis G. Mavrantzas
We employ the generalized bracket formalism of nonequilibrium thermodynamics by Beris and Edwards to derive Lorentz-covariant time-evolution equations for an imperfect fluid with viscosity, dilatational viscosity, and thermal conductivity. Following closely the analysis presented by Öttinger (Physica A, 259, 1998, 24–42; Physica A, 254, 1998, 433–450) to the same problem but for the GENERIC formalism
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Multi-objective optimization of an endoreversible closed Atkinson cycle J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-11-24 Zheng Gong, Yanlin Ge, Lingen Chen, Huijun Feng
Based on finite-time-thermodynamic theory and the model established in previous literature, the multi-objective optimization analysis for an endoreversible closed Atkinson cycle is conducted through using the NSGA-II algorithm. With the final state point temperature (T 2) of cycle compression process as the optimization variable and the thermal efficiency (η), the dimensionless efficient power ( E
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The effects of fractional time derivatives in bioheat conduction technique on tumor thermal therapy J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-11-17 Ibrahim Abbas, Aatef Hobiny, Alaa El-Bary
The article utilizes the fractional bioheat model in spherical coordinates to explain the transfer of heat in living tissues during magnetic hyperthermia treatment for tumors. Maintaining therapeutic temperature is crucial in magnetic fluid hyperthermia, which requires accurate estimations of power dissipation to determine the appropriate number of magnetic particles required for treatment. To address
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Strategies to improve the thermal performance of solar collectors J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-10-25 Bader Alshuraiaan
The paper evaluates a passive method for heat transfer improvement in heat exchangers, which implies the use of nanofluids. All calculations were carried out with a constant volumetric flow rate. The study examines three fluids with 0–4 % volume concentrations of CuO, MgO, and Al2O3 particles. The results indicate an increase in the heat transfer coefficient with increasing temperature. An Al2O3 nanofluid
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Multidimensional numerical simulation of thermodynamic and oscillating gas flow processes of a Gifford-McMahon cryocooler J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-10-21 Debashis Panda, Ashok Kumar Satapathy, Sunil Kr. Sarangi, Upendra Behera
The Gifford-McMahon cryocoolers are considered to be prominent candidates for the cooling of high-temperature superconducting magnets, liquefaction of permanent gases, helium recondensation in magnetic resonance imaging machines, cooling of superconducting quantum interference device, etc. In this paper, multi-dimensional numerical simulation is performed to visualize the oscillating heat and fluid
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Heat transfer effect on the performance of three-heat-reservoir thermal Brownian refrigerator J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-10-07 Congzheng Qi, Lingen Chen, Yanlin Ge, Huijun Feng
A finite-time thermodynamic (FTT) model of three-heat-reservoir thermal Brownian refrigerator is established in this paper. This model can be equivalent to the coupling of a thermal Brownian engine and a thermal Brownian refrigerator with heat transfer effects. Expressions for cooling load and coefficient of performance (COP) are derived by combining FTT and non-equilibrium thermodynamics (NET). The
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Improved modeling of Janus membrane considering the influence of hydrophilic layer characteristics J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-09-16 Noha M. Sayed, H. Noby, Kyaw Thu, A. H. El-Shazly
Some of the previous investigations neglect the mass transfer contribution of the hydrophilic layer for modeling the Janus membrane that is used for direct contact membrane distillation (DCMD). This work studies the impact of adding such resistance on the performance of the DCMD, especially on the temperature polarization coefficient (TPC), thermal efficiency, and permeate flux. The commercial software
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Effect of non-ideal gas working fluid on power and efficiency performances of an irreversible Otto cycle J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-09-07 Di Wu, Yanlin Ge, Lingen Chen, Lei Tian
Based on the irreversible Otto cycle model, applying finite-time-thermodynamic theory, this paper takes power and efficiency as the objective functions, further studies the cycle performance under the condition of non-ideal gas working fluid, analyzes the effects of different loss items and freedom degree (d) of monatomic gas on the cycle performance, and compares performance differences of ideal gas
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Computational radiative transport in complex geometries using orthogonal coordinates J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-09-04 Md Ershadul Haque, Saad Bin Mansoor, Bekir Sami Yilbas
Radiative heat transport involving complex geometries is an important area of investigation. The formulation of the transport phenomenon is more involved and consideration of the proper treatment of the irregular geometry becomes necessary for accurate estimation of heat transfer rates. Therefore, the present study focuses on the modeling and the solution of the radiative transfer equation (RTE) in
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Investigation of non-equilibrium separation time on the partitioning of cephalexin in an aqueous two-phase system composed of glucose and acetonitrile J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-07-15 Parsa Movahedi, Ali Jalali Qush Qayeh, Javad Rahbar Shahrouzi
In order to commercialize aqueous two-phase systems (ATPSs), not only the equilibrium data is essential, but also the knowledge of separation mechanisms, kinetics, settling time, and operational conditions are needed. Mixing duration and settling time are the most critical factors affecting separation and biomolecule partitioning in terms of economic aspects. This research aimed to find the desired
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Uncovering enzymatic structural adaptations from energy dissipation J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-07-07 Andrés Arango-Restrepo, Daniel Barragán, J. Miguel Rubi
While genetic mutations, natural selection and environmental pressures are well-known drivers of enzyme evolution, we show that their structural adaptations are significantly influenced by energy dissipation. Enzymes use chemical energy to do work, which results in a loss of free energy due to the irreversible nature of the process. By assuming that the catalytic process occurs along a potential barrier
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Relations between timescales of stochastic thermodynamic observables J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-05-16 Erez Aghion, Jason R. Green
Any real physical process that produces entropy, dissipates energy as heat, or generates mechanical work must do so on a finite timescale. Recently derived thermodynamic speed limits place bounds on these observables using intrinsic timescales of the process. Here, we derive relationships for the thermodynamic speeds for any composite stochastic observable in terms of the timescales of its individual
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Concepts of phenomenological irreversible quantum thermodynamics II: time dependent statistical ensembles of bipartite systems J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-04-26 Wolfgang Muschik
The wide-spread opinion is that original quantum mechanics is a reversible theory, but this statement is only true for undecomposed systems that are those systems for which sub-systems are out of consideration. Taking sub-systems into account, as it is by definition necessary for decomposed systems, the interaction Hamiltonians –which are absent in undecomposed systems– can be a source of irreversibility
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Thermodynamic analysis of the effect of rotation on gas adsorption J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-04-11 Ramonna I. Kosheleva, Thodoris D. Karapantsios, Margaritis Kostoglou, Athanasios Ch. Mitropoulos
This study examines the effect of a short term rotation on a system of constant volume. Adsorption of CO2 is performed on Activated Carbon (AC) at 281, 293 and 298 K with a special designed device that allows rotation. The adsorption isotherms were conducted up to 10 bar for both No Rotational (NoROT) and Rotational (ROT) cases. The ROT case refers to 60 s of rotation at 5000 rpm. The experimental
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Oblique shock wave in turbulent flow J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-04-04 Andriy A. Avramenko, Andrii I. Tyrinov, Igor V. Shevchuk, Nataliya P. Dmitrenko
The main attention is paid to the analytical analysis of an oblique shock wave in a turbulent adiabatic gas flow. For this purpose, a modified Rankine–Hugoniot model was obtained. On its basis, a solution was derived for the Rankine–Hugoniot conditions for a gas flow with various degrees of turbulence, as well as the equation of the modified Hugoniot adiabat. The behavior of the velocity of an adiabatic
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The entropy production paradox for fractional diffusion J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-03-17 Karl Heinz Hoffmann, Christopher Essex, Janett Prehl, Kathrin Kulmus
Dispersive diffusion and wave propagation seem to be unconnected and fundamentally different evolution equations. In the context of anomalous diffusion however modeling approaches based on fractional diffusion equations have been presented, which allow to build a continuous bridge between the two regimes. The transition from irreversible dispersive diffusion to reversible wave propagation shows an
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Multiscale theory J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-03-17 Miroslav Grmela
Boltzmann kinetic equation is put into the form of an abstract time evolution equation representing links connecting autonomous mesoscopic dynamical theories involving varying amount of details. In the chronological order we present results that led to the abstract time equation evolution in both state space and the space of vector fields. In the final section we list some open problems.
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Generalized Onsager fluxes based on inexact differential 1-form J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-03-06 Qiang Yang, Kuangdai Leng, Man Zhang, Yaoru Liu
Onsager fluxes proposed by D.G.B. Edelen assume that the same symmetry, nonlinear Onsager reciprocal relations, holds near and far from equilibrium. This assumption leads to exact differential 1-form J ⋅ dX everywhere, where J and X are thermodynamic fluxes and forces, respectively. However, thermodynamic fluxes far from equilibrium are characterized by symmetry breaking, which lead to the inexact
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On small local equilibrium systems J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-03-01 Hans Christian Öttinger
Even for large nonequilibrium systems, local equilibrium subsystems in the presence of strong inhomogeneities may be very small. Such situations typically arise either in the presence of large gradients of temperature, velocity or pressure, or in transition zones between different phases. For small thermodynamic systems, the Euler equation of macroscopic thermodynamics does not hold. One less equation
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A practical upper-bound efficiency model for solar power plants J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-02-25 Eduardo González-Mora, Ram Poudel, María Dolores Durán-García
A generalized model for the maximum work rate extractable from the Sun is developed considering a reversible and an endoreversible system to define a more practical upper-bound efficiency for the conversion of solar radiation into work and power. This model is based on a photo-thermal work extractor in communication with a high-temperature radiation reservoir and a low-temperature heat sink. Following
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Energy production in one-qubit quantum Agrawal machines J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-01-24 Julio J. Fernández
We obtain the power and Ω-function of one-qubit Agrawal quantum heat engines solving the Lindbland equation and using the tools of Finite Time Thermodynamics. We prove that these two thermodynamic functions have their maximum values for efficiencies different to zero and the Carnot efficiency. Finally, analyzing the high temperature limit of AQHEs we discover the range of temperatures for which the
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The optimization of heat transfer in thermally convective micropolar-based nanofluid flow by the influence of nanoparticle’s diameter and nanolayer via stretching sheet: sensitivity analysis approach J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-01-24 Liaqat Ali, Pardeep Kumar, Zahoor Iqbal, Sharifah E. Alhazmi, Sujesh Areekara, M. M. Alqarni, Alphonsa Mathew, Retna Apsari
The proposed study demonstrates the flow phenomenon and thermo-variation of a magnetized stretching sheet induced-radiative nanofluid flow. By incorporating the response surface methodology, the heat transfer rate of the thermally convective flow of nanofluid is optimized. The graphene nanomaterial is used in the water-based nanofluid. A dynamic magnetic field, thermal radiation, and the Cattaneo–Christov
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A simplified analysis of the Feynman pallet and ratchet mechanism considering different forms of generated power J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-01-19 Delfino Ladino-Luna, Juan C. Chimal-Eguía, Juan C. Pacheco-Paez, Ricardo T. Páez-Hernández
In this paper, we analyze the advanced Feynman’s mechanism from the well-known Feynman’s Lectures on Physics, under the maximum power output, maximum efficient power, and maximum power density criterion. Considering this mechanism like a thermal engine, and using a simplified model, the physical existence regions for these objective functions are shown. We also show their comparison for given values
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Conservatively perturbed equilibrium in multi-route catalytic reactions J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-01-12 Vitaliy R. Trishch, Gregory S. Yablonsky, Denis Constales, Yuriy O. Beznosyk
The phenomenon of conservatively perturbed-equilibrium (CPE) in multi-route catalytic reactions was studied in the plug-flow reactor (PFR). The following multi-route mechanisms were chosen for studying, i.e., the two-route mechanism with the single common intermediate, the three-route mechanism with some common steps, and the two-route mechanism with the single common step and two common intermediates
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Natural convection of a viscoelastic Cattaneo–Christov fluid bounded by thick walls with finite thermal conductivity J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-01-09 Luis Antonio Dávalos-Orozco, Jose Antonio Ruiz Díaz
The linear natural convection of a Maxwell viscoelastic fluid with Cattaneo–Christov heat flux constitutive equation, between two thick walls with finite thermal conductivity is investigated. The viscoelastic fluid and the heat flux have different relaxation times. The main interest is on the curves of criticality for different thicknesses ratio D and thermal conductivities ratio X. In the middle range
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The Onsager–Machlup theory of fluctuations and time-dependent generalized normal distribution J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-01-06 Sergey I. Serdyukov
Generalization of the variational formulation of the Onsager–Machlup thermodynamic theory of fluctuation is considered. Within the framework of variational theory, we introduce the time-dependent generalized normal distribution and Hamilton–Jacobi equation. The family of higher-order partial differential equations, which generalize classical Fokker–Planck equation, is considered. It is shown that proposed
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Impact of wavy porous layer on the hydrodynamic forces and heat transfer of hybrid nanofluid flow in a channel with cavity under the effect of partial magnetic field J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2023-01-06 Shafqat Hussain, Muhammad Amer Qureshi, Sameh E. Ahmed
This computational analysis focuses on the effects of porous layer on the flow dynamics, heat transfer and hydrodynamic forces of hybrid nanofluid in a channel having an open cavity fixed with bottom wall in the presence of partial magnetic field. The set of PDEs governing the dynamics has been transformed to dimensionless form and simulated using higher order finite element method. In particular,
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New formulation of the Navier–Stokes equations for liquid flows J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2022-12-16 Massimiliano Giona, Giuseppe Procopio, Alessandra Adrover, Roberto Mauri
For isothermal liquid flows, the condition of incompressibility provides a useful simplification for describing their mechanical properties. Nevertheless, it overlooks acoustic effects, and it provides the unpleasant shortcoming of infinite propagation speed of velocity perturbations, no matter the type of constitutive equation for the shear stresses is adopted. In this paper, we provide a derivation
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Are all chemical reactions in principle reversible? Thermodynamic distinction between “conceptually complete” and “practically complete” reactions J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2022-12-14 Andrea Ciccioli
Among the chemical reactions having a pronounced thermodynamic driving force to the formation of products, a distinction has to be made between processes which attain a chemical equilibrium state very much shifted towards the products and those where the final equilibrium state corresponds to the truly complete consumption of reactant(s), i.e. where a true chemical equilibrium is actually not attained
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Maximum ecological function performance for a three-reservoir endoreversible chemical pump J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2022-12-07 Lingen Chen, Shuangshuang Shi, Huijun Feng, Yanlin Ge
Endoreversible chemical pump (ECP) is a theoretical model of electrochemical, photochemical, solid-state apparatus and mass exchangers. ECP can be classified as two-, three- and four-mass-reservoir devices. The usual performance indicators for ECPs are energy pumping rate (EPR) and coefficient of performance (COP). Energy-based ecological function objective (EFO) is introduced to performance optimization
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Minimum power consumption of multistage irreversible Carnot heat pumps with heat transfer law of q ∝ (ΔT) m J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2022-12-06 Lingen Chen, Shaojun Xia
For the given initial finite high-temperature heat reservoir temperature, continuous Hamilton–Jacobi–Bellman equations are established to obtain optimal finite high-temperature heat reservoir temperature for minimum power consumption of multistage Carnot heat pumping system with generalized convective heat transfer law [q ∝ (ΔT) m ]. Analytical expression of optimal heat reservoir temperature with
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Non-equilibrium thermodynamics modelling of the stress-strain relationship in soft two-phase elastic-viscoelastic materials J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2022-12-06 Pavlos S. Stephanou, Panayiotis Vafeas, Vlasis G. Mavrantzas
In “soft–soft nanocomposites” based on film formation of latexes with structured particles, the combination of particle structure and interparticle crosslinking leads to materials that behave as nonlinear viscoelastic fluids at small strains and as highly elastic networks at larger strains. Similarly, in studies of flow-induced crystallization in polymers, a two-phase model is often invoked in which
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Nonlinear dynamics of blood passing through an overlapped stenotic artery with copper nanoparticles J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2022-12-06 Hanumesh Vaidya, Isaac Lare Animasaun, Kerehalli Vinayaka Prasad, Choudhari Rajashekhar, Javalkar U. Viharika, Qasem M. Al-Mdallal
The dynamics of blood carrying microscopic copper particles through overlapping stenotic arteries is an important research area needed for scrutinizing and exploring dynamics through blood vessels. Adipose tissue deposition and other elements of atherosclerosis generate the uncommon artery disease known as arterial stenosis. It limits blood flow and raises the risk of heart disease. Using the Casson
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Densities and isothermal compressibilities from perturbed hard-dimer-chain equation of state: application to nanofluids J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2022-12-02 Mahsa Taghizadehfard, Sayed Mostafa Hosseini, Mariano Pierantozzi, Mohammad Mehdi Alavianmehr
Densities and isothermal compressibilities of several nanofluids were modelled using a perturbed hard-chain equation of state (EoS) by an attractive term from Yukawa tail in 273–363 K range and pressure up to 45 MPa. The nanofluids of interest comprise TiO2-Anatase (-A), TiO2-Rutile (-R), SnO2, Co3O4, CuO, ZnO, and Al2O3 as nanoparticles dispersed in ethylene glycol, water, poly ethylene glycol, ethylene
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Influence of drive chamber discharging process on non-linear displacer dynamics and thermodynamic processes of a fluidic-driven Gifford-McMahon cryocooler J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2022-11-24 Debashis Panda, Manoj Kumar, Suraj K. Behera, Ashok K. Satapathy, Sunil Kr. Sarangi
Continuous effort is made on Gifford-McMahon cryocoolers (GMC) to amplify its refrigeration power, so they can be used to cool the cryopumps, high Tc magnets and development of efficient small-scale hydrogen liquefiers, etc. The fluidic-driven GMC is considered to be more reliable and prominent candidate than the mechanically-driven GMC due to its structural simplicity and reliability. Nonetheless
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Maximum work configuration of finite potential source endoreversible non-isothermal chemical engines J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2022-11-18 Lingen Chen, Shaojun Xia
Chemical engine is an abstract model of some devices, such as solid state, photochemical, and electrochemical devices, photovoltaic cell, and mass exchangers. Finite chemical-potential source is one of its features. Finite time thermodynamics provides effective theoretical tool for determining performance limits for given thermal systems, and determining optimal process paths of thermal systems for
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Stability Analysis of Double Diffusive Convection in Local Thermal Non-equilibrium Porous Medium with Internal Heat Source and Reaction Effects J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2022-09-19 Najat J. Noon, Shatha A. Haddad
The internal heat source and reaction effects on the onset of thermosolutal convection in a local thermal non-equilibrium porous medium are examined, where the temperature of the fluid and the solid skeleton may differ. The linear instability and nonlinear stability theories of Darcy–Brinkman type with fixed boundary condition are carried out where the layer is heated and salted from below. The D 2
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Heat Engine Cycle Configurations for Maximum Work Output with Generalized Models of Reservoir Thermal Capacity and Heat Resistance J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2022-09-15 Lingen Chen, Shaojun Xia
A class of two finite-heat-reservoir endoreversible heat engine with the generalized models of both the reservoir thermal capacities and heat resistances is investigated. The optimality condition for cycle maximum work output is derived by applying optimal control theory, and impacts of both thermal capacity characteristics of heat reservoirs and heat transfer laws on the optimal configurations are
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A Study of the Nonlinear Thomson Effect Produced by Changing the Current in a Thermoelectric Cooler J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2022-09-15 Luis G. Lafaurie-Ponce, Farid Chejne, Luis M. Ramirez-Aristeguieta, Carlos A. Gomez
This work describes the nonlinear Thomson effect produced by a transient current source powering a thermoelectric cooler. The electric effect of the capacitive impedance in the semiconductors was considered in the equations as a novelty term that naturally appears by solving the Boltzmann equation to find the mathematical form of the current density. Thus, considering the new term and heath energy
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Thermoelectric Response Characteristics of Bi2Te3 Based Semiconductor Materials J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2022-09-15 Zhanxuan Wang, Xiulian Cheng, Kai Guo, Enling Tang, Lei Li, Hui Peng, Yafei Han, Chuang Chen, Mengzhou Chang, Liping He
In actual operation, the operating environment temperature of thermoelectric devices are constantly changing and rarely remain stable, and the electrical output characteristics of thermoelectric devices are largely determined by thermoelectric materials. In response to this question, the thermoelectric properties of thermoelectric materials (p and n type Bi 2 Te 3 {\mathrm{Bi}_{2}}{\mathrm{Te}_{3}}
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Impact of Thermal Nonequilibrium on Flow Through a Rotating Disk with Power Law Index in Porous Media Occupied by Ostwald-de-Waele Nanofluid J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2022-09-14 E. Ragupathi, D. Prakash, M. Muthtamilselvan, Qasem M. Al-Mdallal
The current study is made to analyze the impact of local thermal nonequilibrium (LTNE) on the steady, incompressible, and viscous Ostwald-de-Waele nano-liquid over a rotating disk in a porous medium with the various power law index, due to many remarkable applications, such as aeronautical systems, rotating machineries, air cleaning machineries, electrical power-generating systems, heat exchangers
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Physical Mathematical Modeling and Simulation Based on Hyperbolic Heat Transfer for High Heating Rate Processes in Biomass Pyrolysis J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2022-09-09 Farid Chejne, Whady F. Florez, Juan C. Maya, Javier Ordonez-Loza, Manuel Garcia-Perez
This paper explores the hyperbolic heat transfer effects in processes involving high heating rates. The behavior of the model is analyzed in detail under different boundary conditions and the circumstances under which a non-Fourier law could be used to describe thermal conduction processes established from physical mathematical analysis. Finally, the model developed here is coupled to a previous population
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Exergetic and Exergo-Economical Analyses of a Gas-Steam Combined Cycle System J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2022-08-31 Guven Gonca, Bulent Guzel
In this study, the results of an investigation of the performance of a gas-steam combined cycle system (GSCCS) under exergetic and exergo-economical criteria are reported. The effective power (Pef), destroyed exergy (X), efficiency of exergy (ε), unit electric generation cost (Celec) and exergy-dependent economic worth of electrical energy (Cex,elec), which is novelly determined in this study, have
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Optimal Configuration of Finite Source Heat Engine Cycle for Maximum Output Work with Complex Heat Transfer Law J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2022-07-19 Jun Li, Lingen Chen
A finite source heat engine’s optimal configuration is studied. The model includes thermal resistance, heat leakage, a complex heat transfer law, and a heat source with variable temperature. The optimization objective is that the output work is the largest. The influences of factors such as the heat transfer law and heat leakage are analyzed. The results of this paper are universal and inclusive, and
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Energy and Entropy in Open and Irreversible Chemical Reaction–Diffusion Systems with Asymptotic Stability J. Non Equilib. Thermodyn. (IF 6.6) Pub Date : 2022-06-28 Aldo Ledesma-Durán, Iván Santamaría-Holek
This work proposes a novel approach for the study of open systems described by completely irreversible reaction mechanisms in non-homogeneous systems and subject to non-equilibrium boundary conditions. Using the non-equilibrium thermodynamics framework, we consider that in an autonomous system of reaction–diffusion equations, the thermodynamic potentials can be constructed from a Lyapunov function