Fluid Dynamics and Processes of Heat Transfer Enhancement

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Energy Systems".

Deadline for manuscript submissions: 30 June 2025 | Viewed by 1431

Special Issue Editors


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School of Mechanical, Industrial and Aeronautical Engineering, University of the Witwatersrand, Private Bag 3, Wits 2050, South Africa
Interests: heat transfer enhancement; convective nanofluids; CFD
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Dipartimento di Ingegneria, Università degli Studi della Campania Luigi Vanvitelli, Aversa, CE, Italy
Interests: heat transfer enhancement; heat transfer by nanofluids; thermal control
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Guest Editor
Department of Mechanical and Mechatronic Engineering, Stellenbosch University, Stellenbosch, Private Bag X1, Matieland 7602, South Africa
Interests: heat transfer; internal convection; forced and mixed convection
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Department of Applied Sciences, Faculty of Science Engineering and Technology, Buffalo City Campus, Walter Sisulu University, Ago-Iwoye, South Africa
Interests: nanofluid; machine learning; heat transfer; natural convection; energy storage

Special Issue Information

Dear Colleagues,

Modern-day technological developments in electronics, communication, power plants, computing, aviation, power systems, etc., have increased thermal management and heat dissipation issues due to the need to rapidly remove a high quantum of heat. Different innovative techniques have been deployed to improve the thermal management of heat-transporting devices to keep them at threshold temperatures to avoid thermal and material damage. Using experimental, empirical, and numerical approaches, active and passive techniques have been utilized over time to enhance heat dissipation with remarkable achievements, though there have been some shortcomings requiring improvement. Critical to these techniques and aligned with current research development is nanoparticle suspension in conventional thermal fluids, which engineers nanofluids as advanced thermal fluids and utlizes advanced heat-enhancing components such as inserts, porous media, turbulators, etc. Advancements in research in thermal management and engineering have generated diverse applications in the areas of refrigeration and refrigerants, heat exchangers (mini-channel, microchannel, microtube, and mini-tube, etc.), lubricant and coolants development, energy generation (solar collectors, solar chimney, reactor cooling, etc.), thermal energy storage, automobile (fuel cells, nano-fuel, and engine performance), human and building thermal management, manufacturing (hot rolling, machining operations, etc.), data center and electronics cooling, etc. Research progress has led to innovative thermal transporting techniques being developed to cope with the current high heat removal requirements of high-performing thermal devices and components.

This Special Issue, titled “Fluid Dynamics and Processes of Heat Transfer Enhancement”, seeks high-quality works focusing on the development and use of nanofluids (monofluids and hybrid nanofluids) and heat-promoting methods for various applications related to thermal systems and equipment. Studies (experimental and numerical) on the advancement of electric and magnetic fields effects on cooling and the formulation of superior nano-based thermal media (single-particle and hybrid nanofluids that are eco-friendly) are welcome. Potential topics include, but are not limited to, the following:

  1. Building and personal thermal comfort;
  2. Nano-phase change materials;
  3. Thermal energy storage;
  4. AI-driven and optimization-related studies;
  5. Process to enhance heat transfer.

Prof. Dr. Mohsen Sharifpur
Prof. Oronzio Manca
Prof. Dr. Josua Meyer
Dr. Giwa Solomon
Guest Editors

Manuscript Submission Information

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Keywords

  • heat transfer
  • convective nanofluids
  • phase change materials
  • heat exchanger
  • turbulator
  • computational fluid dynamics
  • flow characteristics
  • thermal heat storage
  • porous media
  • machine learning

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Published Papers (2 papers)

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Research

12 pages, 2494 KiB  
Article
Biochar-Aided Heat Transfer in Ground Source Heat Pumps: Effects on Water Capillary Rise and Carbon Storage Capability
by Nicolò Morselli, Filippo Ottani, Marco Puglia, Simone Pedrazzi, Paolo Tartarini and Giulio Allesina
Processes 2025, 13(1), 279; https://doi.org/10.3390/pr13010279 - 20 Jan 2025
Viewed by 458
Abstract
Ground source heat pump systems rely on soil conductivity for optimal performance, and soil conductivity is primarily influenced by soil moisture content. In this study, we investigate how biochar, a porous material derived from biomass gasification and pyrolysis, influences capillary water rise and [...] Read more.
Ground source heat pump systems rely on soil conductivity for optimal performance, and soil conductivity is primarily influenced by soil moisture content. In this study, we investigate how biochar, a porous material derived from biomass gasification and pyrolysis, influences capillary water rise and moisture retention in soil. Mixtures of biochar with soil and sand in varying ratios, along with control mixtures, were prepared and tested on lab-scale equipment. The results showed that biochar-amended samples exhibited a significantly higher capillary water rise. At a height of 0.25 m above the water level, the minimum moisture content in the biochar-treated samples was 43.5%, much higher than the 6.5% recorded in the control group, which consisted of soil or soil and sand only. Even in the long term, mixtures with biochar maintained high moisture content, ranging from 36% to 57%, compared to the control’s 8%, at heights near 0.5 m over the free surface of the water. Moreover, the utilization of biochar as a soil improver in geothermal application is an innovative way for carbon sequestration which, in the analyzed conditions, leads to the storage of up to 0.7 tons of CO2eq per square meter of geothermal field. Full article
(This article belongs to the Special Issue Fluid Dynamics and Processes of Heat Transfer Enhancement)
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21 pages, 14267 KiB  
Article
Optimisation of Heat Exchanger Performance Using Modified Gyroid-Based TPMS Structures
by Martin Beer and Radim Rybár
Processes 2024, 12(12), 2943; https://doi.org/10.3390/pr12122943 - 23 Dec 2024
Viewed by 809
Abstract
Triply periodic minimal surfaces (TPMS) represent an innovative approach to the design of heat exchangers, enabling the optimisation of thermal and hydraulic performance. This study presents a comparative analysis of three geometric TPMS configurations: sheet gyroid, skeletal gyroid, and the newly proposed combined [...] Read more.
Triply periodic minimal surfaces (TPMS) represent an innovative approach to the design of heat exchangers, enabling the optimisation of thermal and hydraulic performance. This study presents a comparative analysis of three geometric TPMS configurations: sheet gyroid, skeletal gyroid, and the newly proposed combined gyroid geometry. Using numerical analysis based on simulations of fluid flow and heat transfer, key parameters such as the heat transfer coefficient, Nusselt number, friction factor, Chilton–Colburn j-factor, and pressure drop were evaluated. The results demonstrated that the combined gyroid geometry achieves the highest heat transfer efficiency, exhibiting significant improvements in the Nusselt number and heat transfer coefficient across the entire flow range. Simultaneously, it maintains low pressure losses, making it well suited for applications demanding high thermal performance with minimal energy losses. This study highlights the potential of TPMS geometries for optimising heat exchanger design and opens new paths for their implementation in industrial systems. Full article
(This article belongs to the Special Issue Fluid Dynamics and Processes of Heat Transfer Enhancement)
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