The stability of composite structures are fundamental problems in continuum mechanics. In present study, considering piezoelectric and electrostrictive effects simultaneously, electro-induced nonlinear buckling and post-buckling characteristics of graphene platelets (GPL) reinforced functionally graded dielectric circular plates are examined. Firstly, equivalent dielectric constant and Young’s modulus

Authors give a review of the methods of finite-time thermodynamics in problems of obtaining the limiting capabilities of two- and multi-flow heat exchange systems. The boundaries of their physical reachability are constructed. The case of flows with changing heat capacity and, in particular, flows with a change in phase state is considered. The conditions for minimum heat exchange dissipation are obtained

Thermal energy storage (TES) is a key technology in the pursuit of cleaner energy production that enables the more efficient use of renewable energy sources and reduces reliance on fossil fuels. Phase change material emulsions (PCMEs) are studied as TES and transportation mediums. A stable PCME with n-hexadecane (HXD) as a dispersed phase and deionized water as base fluid was successfully fabricated

This study investigated the feasibility of double-effect absorption refrigeration systems (DEARS) using hydrofluoroolefin (HFO) refrigerants and ionic liquid (IL) absorbents as working fluid pairs. Enthalpy and vapor-liquid equilibrium (VLE) correlation equations were developed to facilitate thermodynamic modeling and system analysis. Among the examined pairs, R1234ze(Z) + [BMIM][SCN] and R1336mzz(Z) + [OMIM][BF4]

This article reports an experimental analysis of combustion, fuel consumption and pollutant emissions parameters in a single-cylinder research engine operating on spark-ignition (SI) and controlled auto-ignition (CAI), fueled with ethanol. A methodology was developed and comprehensively described to allow the engine, originally designed for SI, to reliably and repeatedly transition to CAI, at a 14

This work explains the experimental and statistical analysis of common rail direct injection (CRDI) engine fuelled with dairy scum oil biodiesel blend (DSOBD B20) which can effectively substitute 20 % of petroleum diesel fuel and avoid massive external foreign exchange enabling fuel saving besides providing energy security to India. This work addresses the SDG 7 by ensuring affordable, reliable and

In this paper, the design, analysis, and improvement of a copolymer polyvinylidene fluoride-trifluoro ethylene PVDF-TrFE pyroelectric sensor for infrared detection was investigated. The sensor architecture comprises a multilayer structure consisting of a PVDF-TrFE active layer, a 2 μm air gap for thermal insulation, and a silicon substrate. The finite element method (FEM) and analytical models were

This study developed an innovative immersion battery thermal management system (BTMS) that incorporates mini-channels and metal foam to address the limitations of conventional indirect liquid-cooled BTMSs under extreme conditions. The proposed system leveraged the superior thermal conductivity of the metal foam and the structural advantages of mini-channels to enhance battery cooling and preheating

Owing to superior thermal performances, the suspension of tri hybrid nanoparticles presents valuable applications across advanced heat transfer systems, heat exchangers, energy-efficient systems, aerospace engineering, automobile industries and biomedical applications. Current investigation seeks thermal insight to nonlinear radiated flow of tri hybrid nanofluid by using the non-Fourier heat flux model

This study explores efficient schemes to substantially accelerate the discharge rates of phase change materials contained in a zigzag-shaped triplex-tube heat exchanger. It comprehensively investigates how zigzag geometry, heat transfer fluid flow parameters, and nanoparticle additives affect PCM discharge characteristics. Introducing a high 67.5° zigzag angle produced a 43.8 W solidification rate

Response surface methodology plays a crucial role in optimising system performance by analysing the effects of key variables, such as channel dimensions and fluid flow conditions, to enhance heat transfer efficiency while minimizing pressure drops. This study focuses on the parametric optimization of Williamson fluid flow through a vertical, porous microchannel using response surface methodology, sensitivity

Photovoltaic (PV) panels convert solar energy into electricity but suffer from efficiency losses as panel temperatures rise. A novel photovoltaic-thermal (PVT) system integrated with a water-cooling system (WCS) was developed in this study to alleviate this issue. Most of the previous studies attach TEC directly at the back surface of the PV panel to reduce PV temperature. However, this research develops

Some problems remain in the mechanical-ventilation cooling of high-geotemperature tunnels, such as the lack of a basis for ventilation parameter design and unclear cooling effect. These significantly affect construction progress and personnel safety. Therefore, based on a self-developed ventilation and cooling test platform for high-geotemperature tunnels, the evolution laws and prediction of the temperature

This study investigates the fluid-structure interaction and heat transfer characteristics of nano-encapsulated phase change material (NEPCM) in a magnetohydrodynamic (MHD) free convection system with a flexible wall. A finite element method coupled with the Arbitrary Lagrangian-Eulerian (ALE) approach was employed to solve the governing equations. The effects of key parameters were examined, including

An in-depth numerical investigation was conducted to explore the impact of the Marangoni effect around a surface bubble on the heat transfer performance in a microchannel. By comparing the average Nusselt numbers of the system in scenarios with or without bubbles on the lower wall of a microchannel, as well as the presence or absence of the Marangoni effect around bubbles, the fluid's heat transfer

Compared with spark ignition (SI), pre-chamber jet ignition (PCJI) can effectively accelerate the combustion and extend lean burn limit. In this paper, the effects of PCJI and SI on methanol direct injection engine were investigated experimentally. Combustion comparison shows that PCJI can effectively shorten the ignition delay period and combustion duration. Especially under lean conditions with an

PCMs manage energy storage and heat transfer by taking in and releasing energy during phase transitions, usually between solid and liquid states. When PCMs melt, they absorb a significant amount of heat, and when they solidify, they release this heat, making them effective for thermal energy storage and transfer. However, their effectiveness is limited by low thermal conductivity and inconsistent performance

Strengthening heat transfer for energy conservation challenges current longer times and higher experimental costs on laboratory scale test, pilot scale test, industrialized production. It is critical to develop an effective and efficient method to simulate process of the heat transfer. Here, a calculus method to predict heat transfer coefficient was reported for the first time. The straight tube heat

An important part for material modeling is the consideration of electromagnetic fields. In this paper, we add them to Hamilton’s principle for mechanical and thermal fields. We begin with a brief introduction to the electric and magnetic limit cases, which allows a non-relativistic formulation. After introducing the thermodynamic fundamentals, we present the Hamilton functionals for the limit cases

This study emphasizes key progresses in cold storage system productivity achieved via the implementation of fins and porous foam. The analysis focused on radiation and conduction mechanisms, omitting the convective term due to the nature of the solidification process. The mathematical framework incorporated two coupled equations to ensure precise system modeling. Numerical methods combined with adaptive

High-temperature waste gas can drive the methane reforming reaction to produce hydrogen; however, existing reactors suffer from significant heat and mass transfer resistance and inefficient operating parameter configurations. To address these challenges, a novel composite membrane reactor was proposed in this study, with operating parameters optimized using the response surface methodology (RSM). A

The investigation of mass and heat transfer of hydromagnetic flow on Casson ternary nanofluid across squeeze two surfaces in a permeable medium with radiative heat transfer and chemical reaction are studied. The mixture of three type of nanoparticles, graphene Gr, graphene oxide GO and silver Ag in the Casson fluid is dissolved in sodium alginate (C6H9NaO7) as the base fluid. Similarity variables is

In the present study, a thermoelastic hydrodynamic (TEH) model was formulated to analyze the steel piston assembly in the D25TCIF diesel engine. The model facilitated the evaluation of the steel piston and connecting rod assembly by integrating elastohydrodynamic lubrication theory and heat transfer analysis. The influence of bearing structural parameters on the lubrication performance of the piston

Increasing engine power outputs have raised exhaust gas temperatures, intensifying thermal stresses on turbine systems and compromising bearing reliability through accelerated seal ring degradation and oil coking. Heat shields installed between turbines and bearings mitigate heat transfer, with their insulation efficiency critically dependent on structural parameters and assembly configurations. This

The present work seeks to develop, through a genetic algorithm (GA), a procedure for optimization of the geometry of micro-channel heat exchangers used to dissipate the residual heat from high concentration photovoltaic panels (HCPV) to prevent the cells from overheating. In addition to the proper thermal management of the photovoltaic cell, the possibility of reuse of the dissipated thermal energy

This study investigates the heat transfer enhancement in a non-uniform magnetize nanofluid flow inside a pyramid shape cavity with hot circular obstacle. Non-uniform heating is applied at the bottom wall, and scaling is used to convert the governing equations into dimensionless form. The Computational Fluid Dynamics (CFD) approach is employed to solve the equations. Numerical results are presented

For the first time, a finite element model was constructed based on the improved shear deformation plate theory and the von Kármán assumption to analyze the linear and nonlinear free vibration behaviour of tri-directional functionally graded porous (TFGP) skew-plates with variable thickness resting on variable Pasternak-elastic foundation in high-temperature environments. The primary goal is to support

This study aims to investigate the potential of Artificial Neural Networks (ANN) in predicting the heat transfer behavior of air as it flows through a tube bank with low temperature and operates under an electric field. To date, no previous studies have applied ANN for predicting heat transfer characteristics under these specific conditions. ANN is employed to address the complexities in heat exchanger

Two dimensional steady bioconvection Oldroyd-B nanomaterial flow due to stretchable sheet. Suspension of both nanoparticles and gyrotactic microorganism are addressed. Melting boundary conditions are imposed. Energy equation is assisted with joule heating, thermophoretic diffusion, thermal radiation and Brownian motion. Further thermo-diffusion and diffusion thermo impacts are considered. Related expressions

This study considered integrated simulation of a chemical reactor for the production of hydrogen from steam reforming of methanol via a hybrid approach. Computational simulation was carried out via CFD (computational fluid dynamics) to determine H2 concentration in the reactor, and the concentration data was then used for machine learning (ML) modeling. For CFD, two-dimensional mathematical modelling

Poor electrical contact is one of the main reasons for electrical fires. Glowing contact triggered by poor contact can reach high temperature on electrical wires. The peak temperature can be up to 1,000 °C. Thus, the radiative thermal hazards of glowing contact cannot be ignored. In this study, the radiative heat flux of glowing contact is measured and quantified. A thermo-electrical Multiphysics model

This study investigates the behavior of magnetohydrodynamic (MHD) boundary layer flow involving hybrid nanofluids containing Titanium Dioxide TiO2 and Gold (Au) nanoparticles dispersed in ethylene glycol (EG). These hybrid nanofluids have gained significant attention due to their enhanced thermal properties, making them suitable for advanced industrial and technological applications. The governing

As a critical component in fuel cell air supply systems, air compressors account for approximately 20 % of the total power consumption in fuel cell systems, significantly limiting overall efficiency improvement. This study proposes a novel enhanced interstage air-cooling method for two-stage centrifugal supercharging systems applied in fuel cells. Two compact interstage air-cooling configurations were

The cooling the solar panels is crucial, as it can greatly enhance the output of the PV system. This paper presents a numerical investigation of solar PV panel cooling using rectangular wavy cooling channel with a 2 % volume fraction of Fe3O4 nanofluid two magnet positions and inclination angles ranging from 0 to 90°. The novelty of this work stems from its exploration of the combined effects of inclination

In this study, we investigate the linear transport of neutral system within the framework of relativistic kinetic theory. Under the relaxation time approximation, we obtain an iterative solution to the relativistic Boltzmann equation in generic stationary spacetime. This solution provides a scheme to study non-equilibrium system order by order. Our calculations are performed in generic hydrodynamic

This paper built a simulation test platform for soil in-situ thermal remediation, and studied the temporal and spatial distribution of temperature, moisture and electrical conductivity in the process of thermal remediation under the condition of multi heat source heating and extraction. The effects of different initial moisture content, dry density, heating temperature and heating time on heat and

This study explores the thermal performance improvement of louvered-fin flat-tube car radiators using a hybrid nanofluid of Al2O3 and SiO2 nanoparticles in a water-ethylene glycol (50:50) mixture. Through detailed CFD simulations combined with symbolic regression, the research analyzes the impact of various air velocities and nanocoolant flow rates on heat transfer efficiency, pressure drop, and friction

This study conducted high-temperature and high-pressure CO2 in-situ extraction and permeability testing of coal bodies. In addition, an in-depth investigation was performed on the cracking characteristics and microstructure of coal samples subjected to in-situ CO2 treatment. The results indicate: Firstly, under different temperatures of supercritical CO2 (ScCO2), the permeability of the coal exhibits

Understanding and accurately quantifying thermoelastic damping (TED) in micro/nanoresonators is a major step in designing them to work well. Empirical and theoretical evidence suggests that classical elasticity theory (CET) and the Fourier heat equation break down when applied to structures with minuscule dimensions. This research presents an innovative framework to approximate TED value in miniature

To improve the performance of automotive exhaust thermoelectric generators, a numerical evaluation of automotive exhaust gas thermoelectric generators with multi-tube heat exchangers is carried out in this paper. The influence of complex flow states in corrugated tubes with different geometric structures on the device's heat transfer and power generation is analyzed. The calculation considers different

The inefficiency of photovoltaic systems is a major obstacle. This research proposes an advanced collector design with dimpled and petal-patterned absorber tubes, coiled twisted tape, and nanofluids combined with nanophase changing materials. The adopted methodology consists of two phases, namely experimentally characterizing the heat transfer performance of the absorber tubes and conducting indoor

The BL20 slant bed CNC lathe is widely recognized for its compact design and precision; however, it suffers from significant thermal errors due to heat generated during operation. This study analyzes and models the thermal errors of the BL20 lathe, identifying the heat produced by the main spindle as the primary source. Utilizing finite element simulation in ANSYS, the thermal characteristics of the

Involvement of nanomaterials in such manufacturing processes is not underestimated. Especially the rheological nanomaterials for heat transfer are useful in processes related to cooling microchips, solar energy and thermal energy technology. Experimental studies have now witnessed the efficiency for utilization of nanoparticles regarding heat transportation enhancement. With such consideration here

Laser hardening, also known as laser phase transformation hardening, is a critical surface modification technology. In current engineering practice, the design of process parameters primarily relies on simulation. However, variations in actual conditions pose a significant challenge in selecting the most appropriate heat source model for accurately simulating the laser quenching process. This paper

This study aims to develop a novel SLT80 nanostructured lipid carrier (NLC) for the encapsulation and delivery of Curcumin (CUR). CUR is a potent therapeutic agent with poor bioavailability, limiting its clinical applications. SLT80 NLCs were prepared using a solvent evaporation method and characterized using experimental techniques (UV–Vis, FTIR, DTA, SEM, and TEM) and molecular dynamics simulations

The paper considers a time-iterative approach, to solve a classical 2D problem of hydromechanics for a viscous fluid flow around a circle. Using the boundary integral equation method and special Green’s function outside the cylinder, a closed system of integral representations is obtained, to determine the perturbed values of the stream and vorticity function in the flow region. The solution is constructed

In this study, we investigated the thermal conductivity characteristics of MWCNT, cobalt-encapsulated MWCNT (Co@MWCNT), and hybrid Co@MWCNT/SiC nanofluids, focusing on their thermal conductivity coefficients and specific heat under varying temperature and volume fraction conditions. The cobalt nanoparticles encapsulated in carbon nanotubes were synthesized using chemical methods and characterized through

This investigation is specifically centered on quantitatively assessing the heat transfer and fluid movement within a shell and spiral tube heat exchanger comprising three distinct designs. Water was considered as the heat transfer fluid, operating within the spiral coil and the shell. In this setup, the hot fluid circulates inside the coil while the cold fluid is contained within the shell. The research

This paper deals with the mathematical modelling and numerical simulation of the rotary gas furnace used at Fundiciones Rey for the preparation of SiO2-CaO slag, a crucial step in the silicon production process of the SisAl Pilot project. The model is structured in three stages to capture the critical thermal and physical processes involved. First, a steady-state combustion model evaluates the wall

As the accuracy requirements of machine tools increase, so do the accuracy requirements for electric spindles. Due to the compact internal structure of the spindle and poor heat dissipation, it is prone to serious thermal errors. Therefore, this study simulates the thermal characteristics of the A02 motorized spindle and builds a thermal error analysis experimental platform to monitor the temperature

Light Emitting Diodes (LEDs) are widely used in lighting, display, and communication due to their high energy efficiency and low cost. With the rapid development of lighting technology, the integration of high-power LEDs has increased, leading to more severe heat dissipation challenges. Traditional passive cooling methods can no longer meet the thermal management needs. Active cooling methods, such

We show a thermal-economic comparative of open-greenhouse and sun-patio drying in the Sierra Mariscal, Chiapas-México. Thermal analyses involve drying kinetics, thermal efficiency, and drying-specific energy; economic analyses involve the investment payback period and importance parameters analysis. In an open-greenhouse, 14 kg/m2 samples were spread in 12 trays (135 kg/batch), while in the sun-patio

The majority of current research has focused on ternary hybrid nanofluids because of their potential to enhance the fluid's hydrodynamic and thermal properties. These nanofluids have improved heat transfer capability for enhancing and maintaining the requirement for renewable and energy-efficient options. However, it is essential to model and study ternary hybrid nanofluids before their use in industry

This study investigates the design and performance of an asymmetrical 49-level cascaded inverter specifically developed for renewable energy applications. The inverter's operation is analyzed under three distinct scenarios: utilizing DC battery sources configured in a per-unit voltage ratio (1:2:7:14), employing DC batteries with actual voltage levels (40:80:280:560 V), and replacing the DC sources

It is important to accurately calculate coal spontaneous combustion (CSC) characteristic parameters for preventing and controlling coal fire disasters. Previous studies have shown that the process of CSC has nonlinear variation characteristics with temperature and O2 concentration. Based on this, non-linear improved model of coal oxidation characteristic parameters is constructed in this study, and

This study experimentally investigates the thermal performance of a loop thermosyphon (LTS) featuring dual vapor lines and one liquid line. Three filling ratios (FR), such as 20 %, 30 %, and 40 % of the total LTS volume, are tested with deionized (DI) water as the working fluid under vertical orientation. Results reveal that the optimal thermal performance occurs at a 30 % FR, with the lowest thermal

Natural convection heat transfer within porous media plays a crucial role in improving energy efficiency and addressing various industrial challenges. This study examines natural convection and entropy generation within a trapezoidal porous enclosure with a square hole, considering the effects of dissipation and thermal radiation. The objective is to identify optimal conditions that improve energy

This computational investigation primarily explores the impact of three factors on thermo-hydraulic performance: the dimensionless distance ratio (z/L = −0.1 to 0.5), Heated Surface [HS] orientation (HS-Up, HS-Down), and Delta Winglet [DW] positioning (DW-PU, DW-PD). The numerical model applies steady-state RANS and energy equations with the (SST) k-ω turbulence model, assuming incompressibility, constant

Fluid motions in cylindrical domains have many applications in the vital areas like as chemical processes, food industry, bioengineering, oil exploitation, etc. The aims of current research is to investigate the Darcy-Forchheimer bio-convective flow of a Second-grade nanofluid over a porous stretching cylinder. The flow model incorporates with several key factors, like magnetic fields, activation energy

Transformer oil and insulating paperboard are widely used in oil-immersed transformers and may be ignited in the event of device failure. The present study aims to investigate the effect of oil immersion on the horizontal flame spread over the transformer insulating paperboard (TIP). A series of experiments were conducted on the samples of TIP and oil-immersed transformer insulating paperboard (OTIP)