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A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Fluid Science and Technology".

Deadline for manuscript submissions: closed (20 April 2025) | Viewed by 5032

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Special Issue Editors

Dr. Pan Wang

E-Mail Website
Guest Editor

School of Civil Engineering, Central South University, Changsha 410083, China
Interests: composites; solid mechanics; computational mechanics; multi-field coupling mechanics

Dr. Zhicheng Yuan

E-Mail Website
Guest Editor

School of Mechanical Engineering, Tongji University, Shanghai 201804, China
Interests: multiphase fluid-solid coupling numerical calculation; multiscale dynamic wetting; gas-liquid interface mass transfer and heat transfer; two-phase flow pattern and flow-induced vibration in microchannel

Special Issue Information

Dear Colleagues,

The goal of this Special Issue on "Research on Heat Transfer Analysis in Fluid Dynamics" is to gather and showcase the latest research advancements, findings, and innovative approaches in the field of heat transfer analysis in fluid dynamics. Heat transfer plays a fundamental role in various industrial and engineering applications, and understanding its behavior in fluid dynamics is crucial for optimizing energy efficiency, performance, and sustainability.

This Special Issue seeks original research articles, review papers, and case studies that delve into novel techniques, theoretical perspectives, experimental investigations, and computational models related to heat transfer analysis in fluid dynamics. Topics of interest include, but are not limited to, convection heat transfer in laminar and turbulent flows, heat transfer enhancement techniques in fluids, phase change heat transfer in multiphase systems, radiative heat transfer in participating media, heat transfer in porous media and nanofluids, experimental and numerical methods for heat transfer analysis, heat transfer in microfluidics and MEMS devices, and heat transfer in renewable energy systems and thermal management.

By fostering collaboration among researchers, engineers, and practitioners, this Special Issue aims to advance our fundamental understanding of heat transfer phenomena in fluid dynamics and provide innovative solutions to real-world challenges. The contributions to this Special Issue will enrich the existing knowledge base, promote interdisciplinary research, and stimulate further development in this field.

We welcome explorations of novel approaches, theoretical models, experimental investigations, and computational techniques related to heat transfer in fluid dynamics. Whether you are studying convection heat transfer, phase change phenomena, radiative heat transfer, or developing new methods to enhance heat transfer, your work is pivotal in addressing industry challenges, promoting sustainable practices, and optimizing energy utilization.

Dr. Pan Wang
Dr. Zhicheng Yuan
Guest Editors

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Keywords

heat transfer
fluid dynamics
multiphase systems
phase change materials
porous media
nanofluids

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Published Papers (4 papers)

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Research

27 pages, 8341 KiB

Open AccessArticle

Mixed Convection Heat Transfer and Fluid Flow of Nanofluid/Porous Medium Under Magnetic Field Influence

by Rehab N. Al-Kaby, Samer M. Abdulhaleem, Rafel H. Hameed and Ahmed Yasiry

Appl. Sci. 2025, 15(3), 1087; https://doi.org/10.3390/app15031087 - 22 Jan 2025

Viewed by 919

Abstract

This study aims to investigate the effect of a constant magnetic field on heat transfer, flow of fluid, and entropy generation of mixed convection in a lid-driven porous medium enclosure filled with nanofluids (TiO₂-water). Uniform constant heat fluxes are partially applied to the bottom wall of the enclosure, while the remaining parts of the bottom wall are considered to be adiabatic. The vertical walls are maintained at a constant cold temperature and move with a fixed velocity. A sinusoidal wall is assumed to be fixed and kept adiabatic at the top enclosure. Three scenarios are considered corresponding to different directions of the moving isothermal vertical wall (±1). The influence of pertinent parameters on the heat transfer, flow of fluid, and entropy generation in an enclosure are deliberated. The parameters are the Richardson number (

{\tilde{R}}_{i}

= 1, 10, and 100), the Hartmann number (0 ≤

\tilde{H}

a ≤ 75 with a 25 step), and the solid volume fraction of nanoparticles (0 ≤

\tilde{Φ}

≤ 0.15 with a 0.05 step). The Grashof and Darcy numbers are assumed to be constant at 10⁴ and 10⁻³, respectively. The finite element method, utilizing the variational formulation/weak form, is applied to discretize the main governor equations. Triangular elements have been employed within the studied envelope, with the elements adapting as needed. The results showed that the streamfunction and fluid temperature decreased as the solid volume fraction increased. The local

\tilde{N} u

number increased by more than 50% at low values of

\tilde{Φ}

(up to 0.1). This percentage decreases between 25% and 40% when

\tilde{Φ}

is in the range of 0.1 to 0.15. As

\tilde{H}

a increases from 0 to 75, these percentages increase at low values of the value of

\tilde{R} i = 1

and 10. These variations are primarily dependent on the value of the Richardson number. Full article

(This article belongs to the Special Issue Research on Heat Transfer Analysis in Fluid Dynamics)

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17 pages, 479 KiB

Open AccessArticle

Thermal Stability and Entropy Generation Analysis for Combustible Third-Grade Fluid Flow Through a Slant Channel: A Spectral Study

by Kgomotshwana Frans Thosago, Peace Oluwalonimi Banjo, Lazarus Rundora and Samuel Olumide Adesanya

Appl. Sci. 2024, 14(24), 11491; https://doi.org/10.3390/app142411491 - 10 Dec 2024

Viewed by 643

Abstract

This paper addresses the mixed convective flow and heat transfer in combustible third-grade fluids through a slant porous channel filled with permeable materials. The fluid layer in contact with the channel wall is exposed to asymmetrical slippage and isothermal conditions. We employ the spectral Chebyshev collocation method (SCCM) to the coupled nonlinear flow governing equations and validate using the Shooting–Runge–Kutta method (RK4). Fluid velocity and temperature profiles, local entropy generation, and irreversibility ratio are computed and analyzed quantitatively and qualitatively. The convergence of the numerical method was demonstrated. The flow and thermal effects results, entropy generation rate, and Bejan number revealed fascinating manifestations that have profound implications in the design of thermo-mechanical systems. In particular, the thermal analysis results are pertinent to optimal system designs that achieve efficient energy utilization. Full article

(This article belongs to the Special Issue Research on Heat Transfer Analysis in Fluid Dynamics)

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16 pages, 7026 KiB

Open AccessArticle

Numerical Study of Coolant Flow Phenomena and Heat Transfer at the Cutting-Edge of Twist Drill

by Farhana Diba, Jamal Naser, Guy Stephens, Rizwan Abdul Rahman Rashid and Suresh Palanisamy

Appl. Sci. 2024, 14(13), 5450; https://doi.org/10.3390/app14135450 - 23 Jun 2024

Cited by 2 | Viewed by 1573

Abstract

Cutting tool coolant channels play a pivotal role in machining processes, facilitating the efficient supply of cooling agents to high-stress areas and effective heat dissipation. Achieving optimal cooling at the tool’s cutting-edge is essential for enhancing production processes. Experimental investigations into tribological stress analysis can be limited in accessing complex tool–workpiece contact zones, prompting the use of numerical modelling to explore fluid dynamics and tribology. In this study, the coolant flow dynamics and heat dissipation in drilling operations were comprehensively investigated through computational fluid dynamics (CFD) modelling. Four twist drill models with varying coolant channel arrangements were studied: standard model drill, standard model drill with notch, profile model drill, and profile model drill with notch. Two distinct approaches are applied to the coolant inlet to assess the impact of operating conditions on fluid flow and heat dissipation at the cutting-edge. The findings emphasize that cutting-edge zones have insufficient coolant supply, particularly in modified drill models such as the standard model drill with notch and profile model drills with and without notch. Moreover, enhanced coolant supply at the cutting-edge is achieved under high-pressure inlet conditions. The standard model drill with a notch exhibited exceptional performance in reducing thermal load, facilitating efficient coolant escape to the flute for improved heat dissipation at the cutting-edge. Despite challenges like dead zones in profile models, the standard-with-notch model yielded the most promising results. Further analyses under constant pressure conditions at 40 and 60 bar exhibited enhanced fluid flow rates, particularly at the cutting-edge, leading to improved heat dissipation. The temperature distribution along the cutting-edge and outer corner demonstrated a decrease as the pressure increased. This study underscores the critical role of both coolant channel design and inlet pressure in optimizing coolant flow dynamics and heat transfer during drilling operations. The findings provide valuable insights for designing and enhancing coolant systems in machining processes, emphasizing the significance of not only coolant channel geometry but also inlet pressure for effective heat dissipation and enhanced tool performance. Full article

(This article belongs to the Special Issue Research on Heat Transfer Analysis in Fluid Dynamics)

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14 pages, 3219 KiB

Open AccessArticle

A Numerical Study of the Effect of Water Speed on the Melting Process of Phase Change Materials Inside a Vertical Cylindrical Container

by Abbas Fadhil Khalaf, Farhan Lafta Rashid, Shaimaa Abdel Letif, Arman Ameen and Hayder I. Mohammed

Appl. Sci. 2024, 14(8), 3212; https://doi.org/10.3390/app14083212 - 11 Apr 2024

Cited by 8 | Viewed by 1089

Abstract

The present work offers a thorough analysis of the impact of water velocity on phase change material (PCM) melting in a vertical cylindrical container. A detailed quantitative analysis uses sophisticated numerical techniques, namely the ANSYS/FLUENT 16 program, to clarify the complex relationship between enthalpy and porosity during the melting process. The experimental focus is on phase transition materials based on paraffin wax, particularly Rubitherm RT42. This study’s primary goal is to evaluate the effects of different water velocities (that is, at velocities of 0.01 m/s, 0.1 m/s, and 1 m/s) on the PCM’s melting behavior at a constant temperature of 333 K. This work intends to make a substantial contribution to the development of thermal energy storage systems by investigating new perspectives on PCM behavior under various flow circumstances. The study’s key findings highlight the possible ramifications for improving PCM-based thermal energy storage devices by revealing significant differences in melting rates and behavior that correlate to changes in water velocities. Future research is recommended to explore the impact of temperature variations, container geometries, and experimental validation to improve the accuracy and practicality of the results and to advance the creation of sustainable and effective energy storage solutions. Full article

(This article belongs to the Special Issue Research on Heat Transfer Analysis in Fluid Dynamics)

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