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

The problem of the influence of distributed dislocations on the equilibrium stability of a rectangular bar loaded with a longitudinal force is investigated. In the subcritical (unperturbed) state, the body experiences a finite plane inhomogeneous deformation. The dislocation density tensor depends on the coordinate measured along the bar thickness and has only one nonzero component corresponding to

Innovative heat recovery, CO2 capture, and energy storage methodologies are pivotal for developing sustainable and eco-friendly solutions for the energy sector. Hence, this study proposes implementing an oxyfuel combustion process for a biogas power plant, modified by an innovative heat recovery method and a CO2 capture-liquefaction technique. Furthermore, the design incorporates high-temperature water

We give an explicit description of the spectral closure for the three-dimensional linear Boltzmann-BGK equation in terms of the macroscopic fields, density, flow velocity and temperature. This results in a new linear fluid dynamics model which is valid for any relaxation time, thus providing an optimal hydrodynamic model for rarefied gas flow over a large range of Knudsen numbers. The non-local exact

This study presents a comparative evaluation of two distinct nanoadditives: a metal-based additive (copper oxide, CuO) and a carbon-based additive (carbon nanotubes, CNTs), focusing on their effects on engine performance and emissions when blended with a biofuel derived from pomelo peel waste (PWB) and conventional diesel fuel (CDF). The PWB bio-oil was extracted via thermal distillation, and a 30 %

Trona ore, a naturally occurring sodium carbonate mineral, is a crucial raw material in various industrial applications, particularly soda ash production. Despite its significance, trona's thermal decomposition kinetics and underlying reaction mechanisms remain underexplored, limiting the optimization of industrial-scale processing methods. This study comprehensively investigates the non-isothermal

During the operation of two-phase thermosyphon loops (TPTLs), different types of oscillations may occur, affecting their safety and performance. Although existing research has preliminarily explored the use of valve regulation to eliminate oscillatory operations in TPTLs, the effects of valves on different types of oscillations have not been verified. In this study, valve regulation was applied to

Water-bath heater (WH) is typically installed in series behind ambient air vaporizers (AAVs) to heat liquefied natural gas (LNG) to a desired temperature, while accounting for the uncertainty in the heat transfer performance of AAV. This paper proposes a novel energy management strategy for an LNG AAV coupled with WH system to reduce the energy consumption of the WH. The strategy incorporates a heat

This paper employed the Levenberg-Marquardt Algorithm to solve the inverse problem of estimating non-uniform heating boundary conditions in a diagonal lid-driven cavity. The non-uniform thermal conditions on lateral walls were exponential, triangular, and sinusoidal-cosinusoidal. The finite volume method run in the Open FOAM software was used to solve the problem directly. The effect of the numbers

The increasing demand for higher flight speeds in hypersonic vehicles has catalyzed the advancement of active regenerative cooling technologies based on endothermic hydrocarbon fuels. This work carried out experimental investigation on the convection heat transfer performance of supercritical n-decane and RP-3 within a horizontal GH3128 microtube with 2 mm inner diameter from room temperature to exceeding

To explore the effects of different antioxidants on thermal behavior characteristics of coal spontaneous combustion (CSC), four antioxidants including tea polyphenols, ethylenediaminetetraacetic acid, melatonin, and β-beta-carotene were studied in this paper. The thermal effects and changes in thermal property parameters of coal treated with different antioxidants were obtained by differential scanning

This research investigates the impact of bioconvection and magnetohydrodynamics on Casson-Williamson fluid flow over a stretching surface while considering the effect of heat sources, thermal radiation, and chemical reactions. They are significant components in industrial processes and biomedical systems, such as targeted drug release and cancer therapies. The nonlinear governing partial differential

Dedicated outdoor air systems (DOAS) can utilize high cooling water temperatures to achieve independent temperature and humidity control, which improves the energy efficiency of the system. Although many studies have investigated the energy consumption of DOAS under conventional controls, there is a lack of a cooling load (sensible load and latent load) decoupling control method to optimize DOAS operation

To enhance the applicability of photovoltaic drying systems in practical applications, a glass greenhouse drying system with photovoltaic roof system were proposed and tested by drying lemon experiment. The sustainability assessment and color analysis of the system was analyzed based on the environment-economic analysis. Furthermore, operation performances of the system were predicted by five machine

A vaccine refrigeration box made of open-cell microporous polyurethane (OCMPU) vacuum insulation panels (VIPs) is developed in this paper. Firstly, it is found that the vacuum degree in the OCMPU VIPs can be improved by drying the membrane material and core material and selecting the combined getter, the corresponding service life of which is approximately 5.9 years. Secondly, it is found that precooling

The compaction process is often carried out in relation to transportation infrastructure. The process is complex since the soil is a heterogeneous environment. Adequate compaction is necessary to ensure the homogeneity and durability of the pavement. This paper presents a novel visual method for assessing soil compaction. A slow-motion camera (optical sensor) and tracking markers placed on the compaction

Rigid polyurethane foam (RPUF) is now widely used in various industries, and there is an increasing interest in preparing green RPUF with high flame retardancy and mechanical properties. In the present work, a casein-modified rigid polyurethane foam was prepared using a one-step foaming method. The thermal, flame retardant, smoke suppressant and mechanical properties of modified RPUFs were examined

To the users, low-temperature adiabatic compressed air energy storage is a promising technology for energy storage. In this work, the parameter selection method of a 200 kW scale CAES system are studied. The increase of inlet air temperature of the compressed air storage tank accelerates the rise rate of pressure and temperature in the tank, and the increase of maximum air storage pressure and air

Because of their enhanced thermophysical characteristics, namely greater thermal conductivity, viscosity control, and long-term stability than traditional nanofluids, hybrid nanofluids drew interest. Such properties make them suitable candidates for many industrial applications such as solar systems and thermal management. However, knowing the thermophysical properties of these materials accurately

This research examines the behavior of premixed flames within a vertical tube, considering both an open and a closed end configuration. The study utilizes a pilot flame as the ignition source. The methane (CH4) and propane (C3H8) flames were tested at equivalence ratios (ϕ) ranging from 0.9 to 1.2 and constant hydrogen content at (RH = 0.1). High-speed cameras captured the flame propagation, revealing

The transition from fossil fuels to renewable energy is a critical process that demands technological advancements in energy conversion systems. Among these, the Organic Rankine Cycle (ORC) has emerged as a promising solution for harnessing low-grade heat sources such as solar and geothermal energy. A crucial component of ORC systems is the turbine, which dictates overall efficiency and power output

The depletion of fossil fuel reserves and growing energy demand have increased the need for renewable energy sources with suitable heat storage systems. Latent heat thermal energy storage (LHTES) using phase change materials (PCMs) provides high energy density and efficiency. However, heat transfer to the PCM core remains a challenge. This study investigates step, sinusoidal, and zigzag channel designs

The construction industry accounts for a significant portion of global energy consumption and carbon emissions. Air source heat pump (ASHP), as an environmentally friendly technology, have been widely employed in energy-efficient buildings to reduce carbon emissions. To ensure stability, ASHP is often used in conjunction with auxiliary heat sources to form composite cooling/heating systems. To evaluate

The chevron angle (β) of a plate heat exchanger significantly affects its heat transfer performance. This study aims to quantify the relation between heat transfer performance and chevron angle. Large eddy simulations of fully developed flow and heat transfer within the heat exchanger channels were conducted to determine heat transfer coefficients, covering a wide range of Reynolds numbers (10 ≤Re ≤ 6000)

The increasing energy demands, and environmental concerns necessitate the development of efficient and sustainable cooling technologies, particularly in arid regions such as Riyadh, Saudi Arabia. This study aims to optimize the energy efficiency, specifically the Coefficient of Performance (COP), of solar-powered absorption cooling systems using advanced Explainable Artificial Intelligence (XAI) and

A kinematic model of 4D continuum with different types of symmetry is introduced and a unified kinematic model of long-range electromagnetic and gravitational fields is proposed. We define the 4D vector potential, introduce 4D distortion tensor, and show that its antisymmetric part gives the classical definition of the electric field intensity vector and the pseudovector of magnetic induction. On the

Absorption refrigeration systems represent an efficient means of cooling utilizing waste heat, with triple-effect absorption refrigeration systems outperforming their double and single-effect counterparts in terms of efficiency. This study conducts energy and exergy analyses on a triple-effect absorption refrigeration system, focusing on internal heat balance and thermal sensitivity to maximize efficiency

The “zero-transmission” structure of the motorized spindle significantly improves precision and efficiency, but the heat generated by the internal motor and bearings also leads to more thermal errors. To eliminate the impact of these errors on machining, it is necessary to establish a thermal error model. However, the hysteresis of temperature can affect the accuracy of the thermal error model. In

Machine learning algorithms offer innovative and reliable solutions for addressing food spoilage and optimizing the drying processes. Stable food supply chains, lower post-harvest agricultural losses, and less perishable fruit and vegetable deterioration can be achieved using efficient drying techniques. This study explored and evaluated the energy dynamics of an infrared continuous drying system for

This study presents an experimental investigation into the thermal and hydrodynamic performance of a compact plate heat exchanger utilizing Fe3O4/water and Fe3O4–Cu/water hybrid nanofluids under the influence of an externally applied magnetic field (0.46 T). The effects of nanoparticle concentration, hybrid nanoparticle composition, and flow conditions on heat exchanger effectiveness and convective

Compared to traditional shallow borehole heat exchanger (BHE), medium-deep borehole heat exchanger (MDBHE) exhibits significant advantages in heat extraction capability. Utilizing MDBHE as the heat source for heating systems can effectively achieve primary energy savings. However, in building heating applications, MDBHE is generally combined with heat pump units, which typically operate in parallel

Ice crystal icing within aircraft engines at high altitudes significantly impacts safe operation. Due to the complexity of the structure and the thermodynamic conditions, gaining a comprehensive understanding of ice crystal icing presents a considerable challenge. This study establishes a numerical simulation framework to investigate ice crystal icing in compressor structures, taking into account rotational

This study investigates the unsteady thermal convective transport mechanism of nanofluids(Water-Al2O3) with couple stress in a circular microchannel under the influence of electromagnetohydrodynamic(EMHD) and time-periodic pressure gradients. The Poisson–Boltzmann(PB) equation related to potential is derived using the Debye–Hückel approximation. The velocity and temperature distributions are obtained

Liquid crystal elastomers are a class of materials which shows unusual characteristics due to its dual nature, i.e. the orientational behavior of liquid crystals combined with the intrinsic features of elastomers. Apart from inhomogeneities, the mesogens, which are linked to the polymer chains in LCEs and are modeled as a unit nematic director, are oriented along a unique direction in case of a monodomain

The current examinations incorporate the electroosmotic forces by considering the copper, aluminum, and carbon nanotubes as nanocomposites with water as the base fluid. Debye-Hückel linearization approach is utilized to study the electroosmotic forces. The effects of quadratically heated Riga plate and study of electric potential by using Gauss law of electricity induces the complex flow dynamics.

The organic Rankine cycle system can fully utilize the low-temperature waste heat generated by oil-free scroll air compressors, enhancing energy reuse efficiency. The heat source temperature (HST), working pump frequency, and filling quantity of the working fluids varied to achieve variable operating conditions for the experimental system. Experimental studies showed that the working pump frequency

The corresponding mathematical model of cyclic viscoplastic deformation of damaged material, a structural element counteracting multiaxial disproportionate modes of hybrid thermomechanical loading, is considered. The model is determined by the relations between viscoplastic deformation and failure, as well as the evolution equations of damage accumulation kinetics and the material strength criterion

Applications for thin film flow are essential in many domains, including heat transfer systems, coating technologies, and microfluidics. Improvements in fields such as semiconductor manufacture, lubrication, and energy-efficient cooling are made possible by an understanding of thin film flow dynamics. Enhancing thermal conductivity by the use of nanofluids including nanoparticles such as MoS2, CuO

Desiccant evaporative systems represent promising alternatives to conventional air conditioners adopted for hot and humid climatic. Many desiccants augmented evaporative cooling systems have been reported in the literature. These systems include ventilation or conventional cycle, recirculation cycle, Dunkle cycle and regenerative heat exchanger cycle. The ventilation cycle is the earliest and probably

This study investigates the predictive modeling of temperature (T(K)) using a dataset of over 128,000 data points characterized by x, y, and z coordinates as inputs. The case study considered here is a photovoltaic system with porous collector for enhancing the efficiency of solar system. Computational modeling was carried out via CFD (Computational Fluid Dynamics), and the temperature distribution

During various missions involving solid rocket motors (SRMs), combustion instability poses a significant challenge, often leading to dangerous outcomes. To elucidate its mechanisms and enhance SRM design, this study investigates the reactive flow characteristics of non-aluminum NEPE propellants under periodic laser disturbances using a microscale model. The model integrates temperature-dependent condensed

The present study aims to evaluate the process of drop-in of R22 in split type air conditioning with refrigerant fluids R290, R454C, and R465A. A mathematical model was developed to do an energetic, economic and environmental analysis using different fluids. The mathematical model of the heat exchangers was developed using the moving boundary technique and the compressor was modeled as recommended

The increase of fossil fuel powered industrial processes and vehicles has resulted in the exhaustion of petroleum reserves and pollution of the environment. Because of its clean-burning, renewable, and biodegradable qualities, biodiesel is becoming more and more recognized as a potential diesel fuel alternative. The present study investigates engine performance and emission characteristics of cottonseed

Polyamide 12 (PA12) is a semi-crystalline thermoplastic used in the automotive and aerospace industries due to its high resistance to chemicals and abrasion and its good thermal stability. The material can be processed with various manufacturing technologies, including selective laser sintering (SLS), which offers great potential for industrial production due to its excellent and reproducible mechanical

A plane strain problem for forced time-harmonic vibrations of an elastic layer lying on an acoustic half-space is considered. The validity of the approximate formulation involving the classical Kirchhoff theory for plate bending as well as its shortened forms is investigated. The developed asymptotic framework demonstrates that the aforementioned theory is not able to predict the effect of the plate

This study conducts a three-dimensional thermohydraulic analysis of wavy channels equipped with embedded baffles on the upper wall, aiming to optimize heat transfer while minimizing pressure losses. The efficiency of heat exchangers is crucial in many industrial applications, and research efforts have focused on improving their performance through geometric modifications. In this context, baffles play

Solar drying systems are energy-efficient, and their performance can be improved with integrated thermal storage materials to stabilize the intermittent radiation input from the sun. To that effect, this paper attempts to make an appraisal of three different types of solar dryers: an evacuated tube air solar heater-based indirect solar dryer, a solar dryer integrated with latent thermal storage, and

This study analyzed the control valve of an innovative solar-driven adsorption chiller, which regulates refrigerant flow during adsorption and desorption processes. The novelty of the system includes heat and mass recovery model working with thermal energy storage. Using Arduino Uno R3 and ANSYS Discovery, the control element of control loop was simulated and predicted by analyzing the valve's flow

Modeling and compensation are important methods to reduce the impact of thermal error on the accuracy for machine tools. However, the premise for obtaining good results is the appropriate selection of key temperature measuring points (KTMPs). The current selection methods are inconsistent with the selection results of varying operating conditions, resulting in low accuracy and poor generalization of

In hydrothermal system, the fault acting as the fluid pathway to assist extraction wells for extracting hydrothermal resources is being concerned. In this study, a coupled thermal-hydraulic-mechanical model of a fault-controlled hydrothermal system was established. The spatiotemporal evolution of the temperature-seepage field in thermal recovery system was revealed, and effects of fault physical characteristics

Based on the definition of exergy-based efficient ecological-function (EEF) proposed in the existing literature, which is the product of energy conversion coefficient-of-performance (ɛ) and exergy-based ecological-function (E), this paper will introduce the exergy-based EEF into performance optimization for Carnot refrigerator cycle. Via endoreversible Carnot refrigerator model established in previous

Here, we investigate the effect of depositional nanoparticles (DNPs) on boiling heat transfer using molecular dynamics simulations. We discuss the type and density of DNPs and reveal their physical mechanism on boiling heat transfer. In the case of nanoparticle material changes, the onset time of explosive boiling, the heat flux, and the enhancement factor of the DNPs are calculated, and the results

This research investigates the scattering behavior of Love waves, also known as Q waves in seismology, induced by an interface crack between an orthotropic elastic layer and an isotropic elastic half-space where the orthotropic layer serves as a wave guide medium. The Dispersion relation and phase velocity have been obtained by using convenient boundary conditions for the Love wave propagation. Using

Heating systems account for a significant portion of global energy consumption, yet conventional fluids like water limit the thermal efficiency of panel radiators. Improving radiator performance while reducing energy use is critical for achieving sustainability goals. This study addresses this challenge by investigating boron nitride (BN)-doped water nanofluid as an advanced heat transfer fluid, which

Acceptable temperature is crucial for underground refuge chamber (URC) to ensure the safety and comfort of occupants. A novel temperature control scheme combining mechanical ventilation with deflectors was proposed for URCs. In this study, the effects of ventilation rate (VR), deflector height and deflector angle on ambient temperature control performance and airflow organization of URC were investigated

The near vertical coal seam adopts a segmented mining method to form a layered composite goaf, and its spontaneous combustion law is more complex. In order to understand the evolution law of temperature and oxygen after injecting low-temperature nitrogen into the goaf, the changes in oxygen and temperature before and after injecting low-temperature nitrogen into the goaf were analyzed through on-site

The current research aims to explore the dynamic movement of fluid and heat involved in a hybrid solar water heating system using CFD. It introduces evacuated tube collectors, integrating these into solar flat plate collectors. This experiment aims to explore and understand how velocity, pressure, temperature, and streamline flows in turbulent kinetic energy are affected under varying fluid flow rates

This study presents a novel analysis of peristaltic flow involving a couple stress fluid embedded with a ternary hybrid nanofluid consisting of titanium dioxide (TiO2), alumina (Al2O3), and copper (Cu) nanoparticles, with blood as the base fluid, in the presence of a magnetohydrodynamics. The investigation focuses on the combined influence of entropy generation, homogeneous-heterogeneous chemical reactions

Jet film cooling is essential for ensuring the thermal integrity of turbine blades in high-temperature environments. Previous research highlights the need for optimized cooling methods to enhance turbine component performance and longevity. This study examines the use of a fluidic oscillator in the cooling process, addressing the increasing demand for efficient and durable turbine designs. The focus