Mohamed ElKashouty^1,*, Mohd Yawar Ali Khan^1,*, Samyah Salem Refadah²

Revue Internationale de Géomatique, Vol.35, pp. 161-177, 2026, DOI:10.32604/rig.2026.079702 - 30 April 2026

Abstract Water scarcity is a significant challenge in arid and semi-arid countries, underscoring the importance of thoroughly studying groundwater resources. Egypt, especially in the Darb El-Arbaein region of the southern Western Desert, faces various water challenges and relies primarily on groundwater from the Nubian Sandstone aquifer. Proper management of this groundwater is essential for addressing these challenges. The study examines the spatial and temporal variations in the hydrogeochemistry of the Nubian sandstone aquifer. Data collected from the aquifer’s monitoring network include key hydrogeochemical parameters, such as total dissolved solid (TDS) and piezometric heads, over different periods.… More >

Marina Astanina, Igor Miroshnichenko^*, Gennadii Shashkin, Mikhail Sheremet

Frontiers in Heat and Mass Transfer, Vol.24, No.2, 2026, DOI:10.32604/fhmt.2026.077952 - 30 April 2026

Abstract This paper explores the thermal behavior of a composite building element consisting of two air cavities inside a porous layer under isothermal heating of the side walls. The system presents a model of a thermal protection element or building envelope where heat transfer occurs through combined conduction in the porous medium and natural convection in the air gaps. The mathematical formulation is based on the Navier-Stokes equations and the Darcy-Brinkman formulation for the porous structure. The natural convection problem has been solved using the ψ–ω–θ formulation in dimensionless form (ψ—stream function, ω—vorticity, θ—temperature). The main… More >

Xiang Chen^1,2,3,*, Shugang Sun¹, Xingxing Wang³, Yelin Deng²

Frontiers in Heat and Mass Transfer, Vol.24, No.2, 2026, DOI:10.32604/fhmt.2026.077731 - 30 April 2026

Abstract Large-capacity energy storage batteries exhibit thermal behaviors markedly different from conventional cylindrical or pouch cells. Due to their multilayer electrode structure, they show pronounced anisotropy in thermal conductivity between through-thickness and in-plane directions. This results in uneven heat diffusion and internal–external temperature gradients that surface sensors cannot capture. Moreover, heat generation varies with temperature and state of charge (SOC) owing to changes in internal resistance. To address these challenges, an equivalent circuit and anisotropic electrothermal coupled model were established, with heat generation and transfer processes analytically derived. Parameter identification was performed through capacity calibration, specific More >

Xianshi Fang¹, Zexian Guo^1,*, Kaihong Tang¹, Guanzhu Ren²

Frontiers in Heat and Mass Transfer, Vol.24, No.2, 2026, DOI:10.32604/fhmt.2026.077372 - 30 April 2026

Abstract To investigate the complex phase change behavior in two-phase condensation flow of hydrocarbon mixtures in inclined tubes, a numerical model was developed in Fluent using the Volume of Fluid method combined with the Lee phase change model. A mixing effect correction was incorporated to enhance the simulation accuracy, and its impact on the flow and heat transfer characteristics was systematically evaluated. Numerical simulations were performed and subsequently corrected for mixing effects; the final results show good agreement with classical experimental data. The average deviation of the heat transfer coefficient is −0.76%, while that of the… More >

Zebing Chen¹, Yang Wang¹, Hong Wu¹, Wenbin Zhao¹, Jinjun Yan¹, Luyao Peng², Yugang Zhao², Zilong Wang², Kang Li^2,*, Saleh S. Meibodi³, Mohammad Moosazadeh⁴, Soheil Mohtaram^2,*

Frontiers in Heat and Mass Transfer, Vol.24, No.2, 2026, DOI:10.32604/fhmt.2026.077274 - 30 April 2026

Abstract Energy storage batteries require strict thermal management due to temperature sensitivity, operating optimally within a narrow thermal range. Simultaneously, control rooms demand stable and comfortable ambient conditions for staff staying long-term. Conventional temperature control systems typically employ isolated solutions, resulting in functional fragmentation and inefficient resource utilization. To address these challenges, this study proposes and implements an integrated R290 secondary loop heat pump air-conditioning system designed to simultaneously manage the thermal environments of both energy storage batteries and control rooms. By adopting a secondary-loop coupling architecture, all thermal regulation is achieved indirectly via indirect heat… More > Graphic Abstract

Yida Shen¹, Bin Dong², Quan Ma¹, Chao Dang^1,*, Congjian Li^2,*, Guojian Ren³, Shaozhan Wang^1,2, Xiaozhe Sun¹, Yong Ding⁴

Frontiers in Heat and Mass Transfer, Vol.24, No.2, 2026, DOI:10.32604/fhmt.2025.077096 - 30 April 2026

Abstract This article explores the application of Physics-Informed Neural Networks (PINNs) in solving supersonic flow problems within a Laval nozzle, proposing innovative methods by integrating physical constraints and neural network optimization techniques. The main innovations of this study include the construction of a novel neural network architecture with shortcut connections to enhance the prediction of overall flow trends and local fluctuations, thereby improving convergence speed, reducing computational costs, and increasing the accuracy of flow field reconstruction. Additionally, this study designs a PINNs framework that incorporates specific physical knowledge (SPK) to improve model stability, generalization, and accuracy, More >

Riyi Lin^*, Bi Pang, Xinwei Wang

Frontiers in Heat and Mass Transfer, Vol.24, No.2, 2026, DOI:10.32604/fhmt.2026.076874 - 30 April 2026

Abstract The thickening of condensed liquid film outside heat-exchange pipes and the pipe bundle effect can significantly degrade the heat transfer efficiency, thus restricting the vacuum phase-change heating furnace from achieving its rated thermal efficiency of over 90%. In this work, a heat transfer enhancement method coupling simple harmonic vibration with non-circular pipes was proposed. A CFD model describing the heat transfer process of horizontal pipes under vibratory conditions was established and stepwise validated against experimental data from published literature and the Nusselt analytical solution. Taking a 50 mm steel circular pipe as the reference, numerical… More >

Guohai Jia¹, Yongjia Ma¹, Yuanyuan Li², Yuling Cheng², Dan Huang^2,*

Frontiers in Heat and Mass Transfer, Vol.24, No.2, 2026, DOI:10.32604/fhmt.2026.076516 - 30 April 2026

Abstract Microwave vacuum drying (MVD) is a promising technique for enhancing drying efficiency and product quality in ginger processing. In this study, the effects of microwave power, vacuum degree, and slice thickness on the MVD behavior of ginger slices were systematically investigated. The drying performance of MVD was also compared with hot-air drying (HAD) and microwave drying (MD). The results showed that increasing microwave power and vacuum degree, together with reducing slice thickness, significantly accelerated moisture removal, with microwave power being the dominant factor. Under comparable conditions, MVD required only one-sixth of the drying time of… More >

Linkang Wang¹, Bowei Xie^2,3,4,*, Zhiqiang Liu¹, Lijing Yi^2,3,4, Mu Du^2,3,4,*

Frontiers in Heat and Mass Transfer, Vol.24, No.2, 2026, DOI:10.32604/fhmt.2026.076486 - 30 April 2026

Abstract The Local Surface Plasma Resonance (LSPR) of spherical metal particles is typically only observed within the visible spectrum. This inherent property renders modulation through alterations in radius or material challenging, significantly constraining its practical applications. In this work, we propose a super-elliptic gold nanoparticle model that allows for the continuous modulation of particle geometry from spherical to star-like shapes using a single roundness parameter (e). Unlike conventional nanorods or discrete nanostars, this geometry provides a unified framework to investigate the evolution of multipole resonances. The radiation characteristics of super elliptic gold nanoparticles in the range of… More >

M. I. Hernández-López¹, E. V. Macias-Melo², F. N. Demesa-López¹, J. Serrano-Arellano^1,*

Frontiers in Heat and Mass Transfer, Vol.24, No.2, 2026, DOI:10.32604/fhmt.2026.076455 - 30 April 2026

Abstract The accumulation of carbon monoxide (CO) in underground spaces poses a significant health hazard; therefore, effective ventilation is essential. This study presents a transient numerical analysis under turbulent flow conditions to evaluate CO dispersion, and identify optimal ventilation configurations. Both during normal operation and in scenarios with high localized concentrations, such as a fire event. The governing equations were solved using the finite volume method with the standard k–ε. Turbulence model. Three configurations were analyzed by varying the outlet location: Case A with an upper-left outlet, Case B with a mid-left outlet, and Case C… More >