The paper deals with the derivation of asymptotically correct equations governing the long-wave bending response of a rectangular ultrathin elastic isotropic plate taking into account surface effects within the framework of the Gurtin-Murdoch theory of surface elasticity. The upper and lower faces are assumed to be pre-stressed by residual surface stresses which can be either tensile or compressive

The conditions for the existence of the Chapman–Enskog first-order solution to the Boltzmann equation for a dilute gas are examined from two points of view. The traditional procedure is contrasted with a somehow more formal approach based on the properties of the linearized collision operator. It is shown that both methods lead to the same integral equation in the non-relativistic scenario. Meanwhile

In general, the most important method of energy storage at the power plant scale is the pumped hydro method, which has been developed in two main models to improve its performance, which is pumped hydro combined with compressed gas (PHCCG) and pumped hydro in closed towers (PHWT). In this research, to answer which of these methods is more suitable, in the form of a case study, both systems were designed

This investigation aimed to predict the temperature distribution in the inlet and exhaust valve and isotherms to the cooling media at a given load of a diesel engine. For the analysis that has been done a Tata- Mercedes diesel engine with 90 mm bore diameter and Stroke length of 120 mm was analysed using FEM through Ansys workbench 15.0. Steady as well as transient cases were considered in combination

Inhibitors are widely used on-site due to their effective prevention. The effect of a novel compound inhibitor composed of thermosensitive hydrogel (TSH) and antioxidants (tea polyphenols (TP) and L-ascorbic acid (VC)) on coal spontaneous combustion (CSC) characteristics was studied. Its inhibitory effect was compared with that of the single component or MgCl2 by macroscopic and microscopic tests.

This study investigates heat transfer enhancement in a ground-air heat exchanger (GAHE) system by incorporating turbulators within the pipe, aiming to address seasonal heating demands in residential and industrial settings. Initially, simulations were conducted without turbulators, providing baseline heat transfer rates across flow velocities and inlet temperatures. Subsequently, turbulators were introduced

In industrial contexts, exhaust hoods play a pivotal role in the control of heat and heat-driven pollutants during manufacturing processes. The present study focuses on the rectangular jet-enhanced exhaust hood (RJEH) in an industrial building affected by the thermally contaminated jet as the case study object. In this study, the CFD method was employed to assess the performance and the performance

To explore the influence of an applied magnetic field on non-premixed diffusion flames, a methane non-premixed diffusion flame combustion system was constructed. MATLAB was utilized for processing flame split-frame images, while DPIV technology was employed to analyze the two-dimensional instantaneous flow field of the flame. A custom-built Langmuir ion probe was used to monitor the variation in flame

In industrial mixing applications, the power consumption and mixing time are employed widely for engineering equipment designs containing non-Newtonian, especially viscoelastic fluids. Though readings on nanofluids are growing, the attentions on nanofluids built on three ingredients elements of viscoelastic-based nanofluids (VBN) are insufficient. Subsequently, in previous study, multi-walled carbon

Microchannel heat sinks play a vital role in modern technology due to the increasing demand for efficient thermal management in compact electronic devices. These systems enhance heat dissipation and maintain optimal operating temperatures, yet conventional heat sinks often fail to meet the stringent cooling demands of modern technologies. To address this, a novel microchannel heat sink reinforced with

There have been rapid developments in ternary hybrid nanofluids in the past few years due to their potential and importance. The potential of ternary hybrid nanofluids to maximise heat transport has enthralled researchers, prompting them to conduct a more thorough investigation of the performance of common base fluids. Researchers utilise nanofluids in applications like sophisticated cool systems,

This study examined the temperature distribution induced by the microwave ablation system employing a grooved axial antenna in liver tumor tissue under various conditions, both without phase-change substances and with the inclusion of phase-change substances. Two methods of injecting phase change material have been studied: axial antenna and injection around the tumor. The temperature distribution

This work analyzes the thermomechanical responses of two-dimensional living tissue to immediate heating without energy dissipation. To effectively use thermal treatment methods and techniques, one must have a thorough comprehension of heat transport and the associated mechanical and thermal impacts on the biological tissue of the patient. An exponentially decaying pulse describes a heat flux across

Carbon capture is an important solution to address global warming and has significance for constructing an abundant, clean energy system. This work discusses a potential carbon capture approach with non-equilibrium condensation in subcritical state and supersonic flows. A numerical model is created to describe the complicated physical phenomena in supersonic flows. The mass and heat transfer and thermodynamic

This study investigates the efficiency of thermal energy storage (TES) systems employing phase change material (PCM) in tanks of different configurations. Six different distinct models of tanks are investigated numerically. The focus lies on analyzing temperature contours, liquid fraction contours, and specific enthalpy contours to understand the dynamic behavior of PCM during the phase change process

Effectively managing thermal conditions and controlling temperatures in electrical, electronic, and electrochemical devices has long been a challenge to their optimal operation and continual development. In recent decades, liquid-cooled heat sinks and enhancements in their heat dissipation capabilities have emerged as effective solutions. This study aims to improve hydrothermal efficiency and achieve

Mechanisms of thermal radiation, Soret-Dufour on Ferromagnetic hybrid nanofluid through a permeable surface has been considered in this paper. The higher thermal condition of the hybrid nanofluid was discussed alongside an induced magnetism. A partial differential equation (PDEs) has been used to describe the physical problem. The set of modeled PDEs was changed into ordinary differential equations

This study introduces a robust and scalable software architecture designed for real-time data ingestion, processing, and user interaction within a smart building setting. Utilizing advanced graph embedding techniques combined with ensemble learning models, we developed a recommender system tailored for Heating, Ventilation, and Air Conditioning (HVAC) optimization in Shenzhen Qianhai Smart Community

There is an increasing demand for 2 K hybrid cryocoolers, consisting of a multi-stage Stirling-type pulse tube cryocooler (SPTC) coupled with a Joule-Thomson cooler (JTC), due to their critical applications in deep space exploration and quantum information technology. Precooling temperature and the number of precooling stages, as the key parameters of hybrid cryocoolers, are crucial for attaining 2 K

The transport performance for a convective non-Newtonian fluid model with heat transfer can be measured through skin friction coefficient, and Nusselt number. The aim of this study is to examine the sensitivity analysis of heat transfer and drag forces effects on magnetized Reiner-Philippoff fluid model over curved surface. The equations that regulate the flow issue are converted into a set of nonlinear

Light Emitting Diode (LED) lighting can be installed at various angles depending on user preferences. However, the cooling performance of heatsinks may decrease with changes in installation angle, potentially affecting the lifespan of LED lighting. This study considered L-shaped fins on a cylindrical base in an effort to minimize variations in thermal resistance with changes in installation angle while

Butanol is an attractive biofuel and power resource in the field of power generation, long-haul heavy-duty transportation, and off-road applications. Particularly, when combined with low temperature combustion concepts, the NOx/soot tradeoff can be relieved at the presence of exhaust gas recirculation. Therefore, the combustion and ignition characteristics of butanol isomers at low oxygen (O2) availability

Enhancing heat transfer efficiency is a key focus in thermal applications. Smooth channels often suffer from poor fluid mixing, limiting their performance. Swirl flow techniques have been introduced to improve heat exchanger efficiency by altering flow direction and inducing turbulence. However, integrating nanofluids with swirl techniques presents challenges such as increased pressure loss and nanoparticle

Microorganisms make biofuel production and synthesizing various compounds and enzymes possible. They serve as excellent model organisms for study. They have been turned into weapons and are occasionally utilised in bioterrorism and combat.

The heat transfer ability of cooling gallery inside high-strengthened diesel engine composite piston is highly required. This article established an oscillating heat transfer model for gas-liquid two-phase flow of cooling gallery. Simulated experiments were conducted to calibrate the model. The effects of two oil supply options and different supply rates on the heat transfer characteristics were studied

This study aims to understand the NOx emission characteristics during pure oxygen (O2) combustion of natural gas (NG) and to provide design data for application in forging furnaces. We numerically investigated the sensitivity of NOx emissions to an up to 10 % increase in nitrogen (N2) content of the fuel and oxidizer. According to the impact analysis, the two cases have a more adverse effect on NOx

This paper offers an informal instructive introduction to some of the main notions of geometric continuum mechanics for the case of smooth fields. We use a metric invariant stress theory of continuum mechanics to formulate a simple generalization of the fields of electrodynamics and Maxwell’s equations to general differentiable manifolds of any dimension, thus viewing generalized electrodynamics as

The current study focuses on analyzing the two-dimensional bioconvective flow of a Williamson fluid over a porous curved stretching surface, by considering homogeneous-heterogeneous reactions and Darcy Forchheimer effect. The investigation explores the thermal properties of the flow under the impact of several factors such as Joule heating, thermal radiation, and heat generation/absorption. The surface

This study conducted a large-scale investigation of 440 boilers across six regions in China to systematically analyze the degradation mechanisms and cleaning inspection methods for organic heat carrier boilers. The findings reveal that the degradation rate of the oil in open systems is significantly higher, with carbon residue values exceeding 1.5 % within four years, whereas closed systems can maintain

A new knock definition was proposed to satisfy the unified knock detection under various engine loads based on in-cylinder pressure signals. Knock indices such as maximum amplitude pressure oscillation (MAPO), maximum pressure rise rate (MPRR), peak pressure (Pmax), arithmetic mean, standard deviation and so on were investigated.

This study investigates the impact of grooved absorber tubes on the efficiency of solar flat plate collectors (SFPCs). Conducted in Vellore, India, it compares plain tubes (case 1) with grooved tubes (cases 2 and 3) using water and glycol-water mixtures. Results show that grooved tubes significantly improved efficiency, particularly with glycol-water mixtures. Efficiency increased by up to 12 % in

This study conducted a detailed experimental study of moist air transfer and its thermal loads in refrigerators under door closing and opening conditions. Employing trace gas technology with CO2 as the tracer, a mass balance equation for CO2 was formulated to determine the air transfer rate. It was founded that under door closing conditions, the primary pathways for moist air transfer were the gasket

To achieve targeted inhibition of the catalytic effects of metal elements in coal on the coal spontaneous combustion, this study based on the chelating constants and properties of chelators, hydroxyethylidene diphosphonic acid (HEDP) and ethylenediamine tetramethylenephosphonic acid (EDTMPA) were selected to carry out targeted inhibition treatment on coal samples with high Fe content and high Ca content

High-purity titanium (Ti) and its alloys are among the most promising materials for advanced turbine blades in aerospace engines. Electromagnetic cold crucible melting is a novel technique for producing contamination-free pure Ti ingots. To enhance the utilization efficiency of electromagnetic energy, an initial assessment of the electromagnetic energy utilization rate of the cold crucible was conducted

The PCM melting process using a helical coil heat exchanger with a plain tube, longitudinal fins, and constructed fins is investigated. Water serves as the heat transfer fluid and paraffin wax as the PCM. A numerical simulation by Ansys Fluent software is conducted to study the liquid fraction and temperature of the PCM with time and the effectiveness of the melting process. The numerical results illustrate

This study examines the characteristics of activation energy on the two-phase flow of a tri-hybrid nanofluid with variable thermal conductivity, viscous dissipation, and NHCMBM using a stochastic-based Levenberg-Marquardt backpropagated neural network (LMB-NN). The Darcy Forchheimer porous media characteristics is included in the momentum equation. The model of Cattaneo-Christov heat flux is employed

Nanofluid flow has attracted the attention of researchers across the globe. It is because of its innovative utilization in various industrial, manufacturing, pharmaceutical, engineering and nano cryosurgery fields. Here intension is to examine flow of Prandtl nanoliquid bounded by an infinite porous plate. Presence of gyrotactic microorganisms and heat generation is addressed. Physical features of

The development of energy diaphragm walls (wall heat exchangers) provides a new perspective for the shallow geothermal energy exploitation. This study conducted a series of thermal performance tests on a model energy diaphragm wall, focusing on the effects of different relative temperature differences and operation modes, which closely aligned with the practical use of ground-source heat pump systems

The rapid growth of MEMS (micro-electromechanical systems) has led to increasing importance of determining the momentum and heat transfer properties of fluids in micro-scale MHD flow. The aim of this study is to determine how to remove the heat generated during the operation of MEMS from the system and how to affect the heat transfer by dispersing ethylene glycol-water mixture based Al2O3 nanoparticles

_This work numerically investigates the thermal decomposition of compound A in a thermosensitive exothermic cylindrical reactor. The study primarily focuses on the influence of the reactor's configuration and heating temperature on its total performance. Simulations of reactors with 2, 4, 6, and 8 hot cylinders are performed using COMSOL Multiphysics 5.0 and finite element analysis, taking the heating

Natural fibers are increasingly being explored in the polymer industry to develop sustainable bio-composites with enhanced functional properties. While plant fibers generally suffer from thermal stability limitations, their integration with suitable fillers and resin matrices can significantly enhance their thermal performance, making them viable for engineering applications. This study investigates

The effects of a magnetic field, a Hall current, and Joule heating on the peristaltic motion of a mixed convective Jeffrey fluid in a uniform channel are examined here. The study investigates a wide range of slip situations, with several waveforms used to characterize the flow being taken into account. To investigate this intricate phenomenon, we use the ND solution method to numerically solve a set

Progressing an effective heat conductivity of base fluids poses a significant challenge faced by industries today, leading to growing interest in nanofluids. As conventional fluids are unsatisfactory for effective heat transmission compared to nanofluids, this article attempts to shed some light on to scrutinize the heat transmission and flow behaviours of nanofluid based on Titanium dioxide and Copper

One design indicators mathematical model considering temperature change influences on fluid physical properties was constructed to calculate heat transfer capacity and weight for offset strip plate-fin heat exchanger (OSPFHX). Separately compared to experimental data and three-dimensional model weighing data, heat transfer capacity calculation average error and weight calculation error are 7.47 % and

This research provides an in-depth simulation of cold energy storage within the freezing phase within an enclosure designed with a complex geometry. The study models transient heat conduction and incorporates tree-shaped fins to direct cold energy into the enclosure's corners. Dispersing nano-powders in water was found to considerably enhance the thermal conductivity of the working fluid. The effects

Asymmetric channel flows incorporating micropolar fluids are applicable in designing lubrication systems for bearings, gears, and seals, especially in industries like automotive and aerospace engineering. This research presents a comprehensive thermodynamic assessment of the micropolar fluid flow in an asymmetric channel using a combination of the neural network fitting tool (NNFT) and the quasi-linearization

The novel type of model of hybrid nanofluid attracted a lot of the attention of researchers due to wide-ranging physical applications in the energy producing, industrial and engineering fields. These fluids have enormous thermal performance compared to simple fluids and nanofluid engineering by the suspension of a single type of nanoparticles. Therefore, the current study is concerned with examining

Microchannel heat sinks (MCHSs) have demonstrated their significance in various industrial applications due to their efficient cooling capabilities. Particularly in power systems, they emerge as a potential cooling solution for critical equipment such as superconducting synchronous condensers (SSCs), which is crucial for addressing the increasing challenges of power density and thermal management.

Gasification is an effective way of converting biomass into electricity. However, determining optimal conditions to reach higher temperature gradients and ensure thermal stability of the reactors for syngas production is challenging. This paper presents a hybrid static and dynamic model for optimizing fixed-bed biomass gasification using experimental data. A reduction-model has been developed and simulated

University campuses resemble small cities in terms of their high energy use intensity. In transitioning toward sustainability, many universities have set ambitious targets to cover their electricity needs through solar energy. This has substantial environmental and economic advantages. Such initiatives bridge the gap between research and practice and extend sustainability to other universities. This

The article introduces thermoelastic waves in a hollow sphere under maintained constant temperature and radial stress. A unified thermal conduction equation is derived due to Green and Naghdi II, III, three-phase-lag, and Lord and Shulman coupled thermoelastic theories. The problem is treated analytically adopting Laplace transform. The analytical explanation of the thermoelastic response of hollow

Adsorption refrigerators are crucial for recovering low-grade waste heat and enhancing energy efficiency. The heat source temperature significantly influences the performance of adsorption refrigerators, which can vary in practical applications. In this study, a double-bed adsorption refrigerator was constructed using a silica/copper-chip composite as the adsorbent. Experimental investigations were

The solar-air source heat pump (SASHP) heating system has gained significant attention in rural clean heating renovations. Nonetheless, the lack of low-cost thermal storage terminals in rural areas results in low energy utilization and high electricity consumption. This study proposes a SASHP system coupled with sand-based thermal storage floor and experimentally evaluates its thermal performance in

The urgent need to address global warming and transition to sustainable energy solutions has driven the development of innovative heating systems. Among those solutions, several district heating alternatives have been proposed to combine heat pumps and thermal energy storage tanks. This paper addresses the integration of photovoltaic thermal systems (PVT) with aquifer thermal energy storage (ATES)

The growing emphasis on energy efficiency and carbon emission reduction has positioned integrated distributed energy systems (DES) as a pivotal solution for multi-building applications. This study develops and tests a comprehensive optimization model designed to evaluate the economic and environmental performance of DES. The model integrates critical components, including natural gas turbines, photovoltaic

In this paper, an experimental model of a 1 m2 tank fire was constructed to investigate the coupling mechanism between 2-bromo-3,3,3-trifluoro-propene (BTP) and the compressed air foam system (CAFS), and to optimize the extinguishing performance of the combination of extinguishing agents by controlling the flow rate of BTP. The results demonstrated that the combination of compressed air foam (CAF)

In our recent analysis, we investigated the 3-D flow of a second-grade fluid over an exponentially stretching sheet, taking into account the variable viscosity and thermal conductivity of the fluid. We also considered the influences of a magnetic field and the characteristics of a permeable exponential stretching sheet under thermal slip condition. Furthermore, we explored the phenomena of radiation

In this study, a numerical analysis was performed to investigate how the aspect ratio of flat tubes in a double-tube latent thermal energy storage system affects the melting behavior and thermal transfer properties of N-eicosane. To simulate the melting characteristics of the systems, the enthalpy–porosity method was employed. The aspect ratios of flat tubes in the inner and outer configurations significantly

The recovery and utilization of ventilation air methane (VAM) are critical for advancing green, low-carbon and sustainable development. This study aims to address the challenge associated with the low concentration of VAM, which hampers its effective utilization. A self-constructed experimental system was employed in which VAM was blended with pulverized coal for thermal storage and oxidation. This

The growing global demand for freshwater, coupled with the scarcity of freshwater resources and the environmental concerns associated with fossil fuel-based water desalination, necessitates innovative approaches to freshwater production. This paper presents a novel method for desalinating water using renewable energy sources. The proposed method involves the use of a glass chamber with a sloping roof