Open Access
ARTICLE
Karim Amrani1,*, Eugenia Rossi di Schio2,*, Mohamed Bouzit3, Abderrahim Mokhefi1,4, Abdelkader Aris1, Cherif Belhout3, Paolo Valdiserri2
Frontiers in Heat and Mass Transfer, DOI:10.32604/fhmt.2025.059833
（This article belongs to the Special Issue: Heat Transfer Enhancement for Energy Applications)
Abstract The present study focuses on the flow of a yield-stress (Bingham) nanofluid, consisting of suspended Fe3O4 nanoparticles, subjected to a magnetic field in a backward-facing step duct (BFS) configuration. The duct is equipped with a cylindrical obstacle, where the lower wall is kept at a constant temperature. The yield-stress nanofluid enters this duct at a cold temperature with fully developed velocity. The aim of the present investigation is to explore the influence of flow velocity (Re = 10 to 200), nanoparticle concentration ( = 0 to 0.1), magnetic field intensity (Ha = 0 to 100), and… More >
Open Access
ARTICLE
L. S. Sundar*, Sérgio M. O. Tavares, António M. B. Pereira, Antonio C. M. Sousa
Frontiers in Heat and Mass Transfer, DOI:10.32604/fhmt.2025.055854
Abstract The experimental analysis takes too much time-consuming process and requires considerable effort, while, the Artificial Neural Network (ANN) algorithms are simple, affordable, and fast, and they allow us to make a relevant analysis in establishing an appropriate relationship between the input and output parameters. This paper deals with the use of back-propagation ANN algorithms for the experimental data of heat transfer coefficient, Nusselt number, and friction factor of water-based Fe3O4-TiO2 magnetic hybrid nanofluids in a mini heat sink under magnetic fields. The data considered for the ANN network is at different Reynolds numbers (239 to 1874),… More >
Open Access
ARTICLE
Wei Zhang*, Haojie Chen, Kunyu Cheng, Yulong Zhang
Frontiers in Heat and Mass Transfer, DOI:10.32604/fhmt.2025.059837
（This article belongs to the Special Issue: Recent Advances in Loop Heat Pipe)
Abstract The present work deals with the numerical study of the two-phase flow pattern and heat transfer characteristics of single-loop pulsating heat pipes (PHPs) under three modified surfaces (superhydrophilic evaporation section paired with superhydrophilic, superhydrophobic, and hybrid condensation section). The Volume of Fluid (VOF) model was utilized to capture the phase-change process within the PHPs. The study also evaluated the influence of surface wettability on fluid patterns and thermo-dynamic heat transfer performance under various heat fluxes. The results indicated that the effective nucleation and detachment of droplets are critical factors influencing the thermal performance of the… More >
Graphic Abstract
Open Access
ARTICLE
Yiming Rongyang1, Zhenyue Yu1, Ruisheng Liang2,*, Wei Su1, Jianjian Wei2,3
Frontiers in Heat and Mass Transfer, DOI:10.32604/fhmt.2025.059637
（This article belongs to the Special Issue: Fluid Flow, Heat and Mass Transfer within Novel Cooling Structures)
Abstract Data center cooling systems are substantial energy consumers, and managing the heat generated by electronic devices is becoming more complex as chip power levels continue to rise. The single-phase immersion cooling (SPIC) server with oil coolant is numerically investigated using the validated Re-Normalization Group (RNG) k-ε model. For the investigated scenarios where coolant velocity at the tank inlet is 0.004 m/s and the total power is 740 W, the heat transfer between the heat sinks and the coolant is dominated by natural convection, although forced convection mediates the overall heat transfer inside the tank. The maximum… More >
Open Access
ARTICLE
Abdelilah Makaoui1, El Bachir Lahmer1,*, Jaouad Benhamou1,2, Mohammed Amine Moussaoui1, Ahmed Mezrhab1
Frontiers in Heat and Mass Transfer, DOI:10.32604/fhmt.2024.060166
Abstract This study focuses on numerically investigating thermal behavior within a differentially heated cavity filled with nanofluid with and without obstacles. Numerical comparison with previous studies proves the consistency and efficacy of the lattice Boltzmann method associated with a single relaxation time and its possibility of studying the nanofluid and heat transfer with high accuracy. Key parameters, including nanoparticle type and concentration, Rayleigh number, fluid basis, and obstacle position and dimension, were examined to identify optimal conditions for enhancing heat transfer quality. Principal findings indicated that increasing the Rayleigh number boosts buoyancy forces and alters vortex More >
Open Access
ARTICLE
Sudipta Debnath1, Zahir Uddin Ahmed2, Muhammad Ikhlaq3,4,*, Md. Tanvir Khan5, Avneet Kaur6, Kuljeet Singh Grewal1
Frontiers in Heat and Mass Transfer, DOI:10.32604/fhmt.2024.059734
Abstract Impinging jet arrays are extensively used in numerous industrial operations, including the cooling of electronics, turbine blades, and other high-heat flux systems because of their superior heat transfer capabilities. Optimizing the design and operating parameters of such systems is essential to enhance cooling efficiency and achieve uniform pressure distribution, which can lead to improved system performance and energy savings. This paper presents two multi-objective optimization methodologies for a turbulent air jet impingement cooling system. The governing equations are resolved employing the commercial computational fluid dynamics (CFD) software ANSYS Fluent v17. The study focuses on four… More >
Graphic Abstract
Open Access
ARTICLE
Ruibin Wang, Fuyong Su*, Shuo Huang, Shengyong Ma
Frontiers in Heat and Mass Transfer, DOI:10.32604/fhmt.2024.058835
Abstract The main function of a hot blast stove is to deliver a high-temperature and stable hot blast to the blast furnace, which has an important impact on the blast furnace ironmaking process. To improve the combustion efficiency, a simulation model of the combustion part of an internal combustion hot blast stove was established by combining turbulence, combustion, and radiation models. Based on the original model, a new type of internal combustion hot blast stove is proposed. The results indicated insufficient combustion in the original structure and higher CO concentrations in the corners of the eyes… More >
Open Access
ARTICLE
Ziyi Wang1,2, Sen Li1,2,*, Xiaolin Wei1,2, Jing Zhao1, Bo Li1, Yuan Yao1
Frontiers in Heat and Mass Transfer, DOI:10.32604/fhmt.2024.059740
Abstract In the novel fully dry converter gas recovery process, a novel circumfluent cyclone separator with an evaporation heating surface can simultaneously realize the dust removal and sensible heat recovery of converter gas. For this equipment, the distributions of internal flow and wall heat transfer affect the efficiency of dust removal and sensible heat recovery. In this study, based on on-site operation tests, the distributions of internal flow and wall heat transfer in the circumfluent cyclone separator are studied by numerical simulation. The results indicate that the flow rate proportions in different regions of the circumfluent More >
Open Access
ARTICLE
Rabindra Nath Mondal1, Giulio Lorenzini2,*, Sidhartha Bhowmick1, Sreedham Chandra Adhikari3
Frontiers in Heat and Mass Transfer, DOI:10.32604/fhmt.2024.057990
Abstract The present study investigates the non-isothermal flow and energy distribution through a loosely bent rectangular duct using a spectral-based numerical approach over a wide range of the Dean number . Unlike previous research, this work offers novel insights by conducting a grid-point-specific velocity analysis and identifying new bifurcation structures. The study reveals how centrifugal and buoyancy forces interact to produce steady, periodic, and chaotic flow regimes significantly influencing heat transfer performance. The Newton-Raphson method is employed to explore four asymmetric steady branches, with vortex solutions ranging from 2- to 12 vortices. Unsteady flow characteristics are… More >
Open Access
ARTICLE
Hongkun Lu1,2,*, M. M. Noor2,3,4,*, K. Kadirgama2
Frontiers in Heat and Mass Transfer, DOI:10.32604/fhmt.2024.059871
Abstract To improve the thermal performance and temperature uniformity of battery pack, this paper presents a novel battery thermal management system (BTMS) that integrates oscillating heat pipe (OHP) technology with liquid cooling. The primary innovation of the new hybrid BTMS lies in the use of an OHP with vertically arranged evaporator and condenser, enabling dual heat transfer pathways through liquid cooling plate and OHP. This study experimentally investigates the performance characteristics of the ⊥-shaped OHP and hybrid BTMS. Results show that lower filling ratios significantly enhance the OHP’s startup performance but reduce operational stability, with optimal… More >
Open Access
ARTICLE
Mariam Habouria1, Sahbi Ouertani1,*, Noura Ben Mansour2, Soufien Azzouz1, Mohamed Taher Elaieb3
Frontiers in Heat and Mass Transfer, DOI:10.32604/fhmt.2024.057387
（This article belongs to the Special Issue: Multiscale Heat and Mass Transfer and Energy Conversion)
Abstract The aim of this paper was to characterize through experiment the moisture and temperature kinetic behavior of Eucalyptus gomphocephala wood samples using microwave heating (MWH) in two scenarios: intermittently and continuously. The mechanical properties and surface appearance of the heated samples were also investigated. Continuous and intermittent microwave drying kinetic experiments were conducted at a frequency of 2.45 GHz using a microwave laboratory oven at 300, 500, and 1000 watts. Drying rate curves indicated three distinct phases of MWH. Increasing the microwave power with a shorter drying time led to rapid increases in internal temperature and… More >
Open Access
ARTICLE
Hanli Bi1, Zheng Peng2, Chenpeng Liu3, Zhichao Jia1, Guoguang Li1, Yuandong Guo2, Hongxing Zhang1,*, Jianyin Miao1
Frontiers in Heat and Mass Transfer, DOI:10.32604/fhmt.2024.057933
（This article belongs to the Special Issue: Recent Advances in Loop Heat Pipe)
Abstract As space technology advances, thermal control systems must effectively collect and dissipate heat from distributed, multi-source environments. Loop heat pipe is a highly reliable two-phase heat transfer component, but it has several limitations when addressing multi-source heat dissipation. Inspired by the transport and heat dissipation system of plants, large trees achieve stable and efficient liquid supply under the influence of two driving forces: capillary force during transpiration in the leaves (pull) and root pressure generated by osmotic pressure in the roots (push). The root pressure provides an effective liquid supply with a driving force exceeding… More >
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