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Advances in Numerical and Experimental Modelling of Fluid Flow and Heat Transfer

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "J1: Heat and Mass Transfer".

Deadline for manuscript submissions: closed (6 January 2025) | Viewed by 3203

Special Issue Editor

Dr. Liyun Lao

E-Mail Website
Guest Editor
School of Water, Energy and Environment, Cranfield University, Cranfield MK43 0AL, UK
Interests: multiphase fluid dynamics; energy systems; process monitoring and measurement

Special Issue Information

Dear Colleagues,

The intersection of numerical and experimental approaches in fluid dynamics and heat transfer has yielded significant advancements in understanding complex phenomena. This Special Issue aims to showcase the latest research, methodologies, and breakthroughs in the field, with a specific emphasis on applications in the energy sector. By bridging the gap between theory and application, we seek to create a comprehensive resource for scholars, researchers, and practitioners actively contributing to the evolving landscape of fluid flow and heat transfer studies with direct implications for energy technologies.

Themes and Topics:

We invite original research articles, reviews, short communications, and case studies covering, but not limited to, the following themes:

  • Innovative numerical methods for fluid dynamics and heat transfer simulations in energy systems;
  • Experimental techniques and instrumentation for studying fluid flow and heat transfer in energy applications;
  • Multi-scale and multi-physics modeling approaches relevant to energy technologies
  • Applications in various energy sectors, including renewable energy, thermal power plants, and energy storage systems;
  • Computational fluid dynamics (CFD) validation through experimental data in the context of energy applications;
  • Heat exchanger and thermal management system modeling with direct applications to energy efficiency;
  • Advances in turbulent flow modeling and simulation for enhanced energy system performance;
  • Fluid–structure interaction studies in the design and optimization of energy-related devices.

Authors are encouraged to highlight the practical implications and applications of their research in the energy sector. Submissions that demonstrate direct relevance to improving energy efficiency, sustainability, and innovation in energy technologies are particularly welcomed.

Dr. Liyun Lao
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • numerical modelling
  • experimental fluid dynamics
  • thermodynamics
  • computational fluid dynamics
  • heat transfer
  • mass transfer
  • transport phenomena
  • energy technologies
  • energy efficiency
  • renewable energy

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  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • e-Book format: Special Issues with more than 10 articles can be published as dedicated e-books, ensuring wide and rapid dissemination.

Further information on MDPI's Special Issue policies can be found here.

Published Papers (3 papers)

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Research

30 pages, 6063 KiB  
Article
Computational Fluid Dynamic Modeling of Pack-Level Battery Thermal Management Systems in Electric Vehicles
by Yifan Chen and Zhong Hu
Energies 2025, 18(3), 484; https://doi.org/10.3390/en18030484 - 22 Jan 2025
Viewed by 621
Abstract
In electric vehicles (EVs), the batteries are arranged in the battery pack (BP), which has a small layout space and difficulty in dissipating heat. Therefore, in EVs, the battery thermal management systems (BTMSs) are critical to managing heat to ensure safety and performance, [...] Read more.
In electric vehicles (EVs), the batteries are arranged in the battery pack (BP), which has a small layout space and difficulty in dissipating heat. Therefore, in EVs, the battery thermal management systems (BTMSs) are critical to managing heat to ensure safety and performance, particularly under higher operating temperatures and longer discharge conditions. To solve this problem, in this article, the thermal analysis models of a 3-battery-cell BP were created, including scenarios (1) natural air cooling without a BTMS; (2) natural air cooling with water cooling hybrid BTMS; and (3) forced air cooling plus water cooling composite BTMS. The thermal performances of the pack-level BPs were simulated and analyzed based on computational fluid dynamics (CFD). A variety of boundary conditions and working parameters, such as ambient temperature, inlet coolant flow rate and initial temperature, discharge rate, air flow rate, and initial temperature, were considered. The results show that without a BTMS (Scenario 1), the maximum temperature in the BP rises rapidly and continuously to reach 63.8 °C, much higher than the upper bound of the recommended operating temperature range (ROTR between +20 °C to +35 °C) under the extreme discharge rate of 3 C and even if the discharge rate is 2 C. With a hybrid BTMS (Scenario 2), the maximum temperature in BP rises to about 38.7 °C, slightly above the upper bound of the ROTR. Lowering the coolant (water) initial temperature can effectively lower the temperature up to 5.7 °C in BP, but the water flow rate cannot since the turbulence model. While with a composite BTMS (Scenario 3), the temperature can be further lowered up to 1.5 °C under the extreme discharge rate of 3C, just reaching the upper bound of the ROTR. In addition, lowering the initial coolant temperature or air temperature can effectively decrease the temperatures up to 5.1 and 1.0 °C, respectively, in BP, but the coolant flow rate (due to the turbulence model) and the air flow rate cannot. Finally, the thermal performances of the different battery cells in the BP with different cooling systems and at the different positions of the BP were compared and analyzed. The present work may contribute to the design of BTMSs in the EV industry. Full article
(This article belongs to the Special Issue Advances in Numerical and Experimental Modelling of Fluid Flow and Heat Transfer)
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27 pages, 13333 KiB  
Article
Numerical Prediction of Solid Particle Erosion in Jet Pumps Based on a Calibrated Model
by Xuanchen Wan, Mengxue Dong, Maosen Xu, Chuanhao Fan, Jiegang Mou and Shuai Han
Energies 2024, 17(22), 5720; https://doi.org/10.3390/en17225720 - 15 Nov 2024
Viewed by 656
Abstract
Jet pumps are widely used in petrochemical processes, nuclear cooling, and wastewater treatment due to their simple structure, high reliability, and stable performance under extreme conditions. However, when transporting solid-laden two-phase flows, they face severe erosion problems, leading to reduced efficiency, malfunctions, or [...] Read more.
Jet pumps are widely used in petrochemical processes, nuclear cooling, and wastewater treatment due to their simple structure, high reliability, and stable performance under extreme conditions. However, when transporting solid-laden two-phase flows, they face severe erosion problems, leading to reduced efficiency, malfunctions, or even failure. Therefore, optimizing jet pump performance and extending its service life is crucial. In this study, an experimental platform was established to conduct experiments on wall erosion in jet pumps. The CFD-DEM method was used to simulate the solid–liquid two-phase flow in the jet pump, comparing six erosion models for predicting erosion rates. The Grey Wolf Optimization algorithm was applied to calibrate model coefficients. The results indicate that the Neilson erosion model shows the best consistency with the experimental results. The inlet flow rate significantly influenced the erosion rates, while the flow rate ratio had a smaller effect. The particle concentration exhibited a nonlinear relationship with erosion, with diminishing impact beyond a certain threshold. As the factors varied, the erosion distribution tended to be uniform, but high erosion areas remained locally concentrated, indicating intensified localized erosion. Full article
(This article belongs to the Special Issue Advances in Numerical and Experimental Modelling of Fluid Flow and Heat Transfer)
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14 pages, 13316 KiB  
Article
Optimizing the Size of a Moving Annular Hollow Laser Heat Source
by Yongqi Ding and Xiaohui Zhang
Energies 2024, 17(15), 3750; https://doi.org/10.3390/en17153750 - 30 Jul 2024
Viewed by 1083
Abstract
The physical phenomenon of the annular hollow laser surface treatment process is complex, and the internal mechanism involves multiple disciplines and fields. In addition to the general parameters of laser beams, such as laser power and scanning speed, an annular hollow laser beam [...] Read more.
The physical phenomenon of the annular hollow laser surface treatment process is complex, and the internal mechanism involves multiple disciplines and fields. In addition to the general parameters of laser beams, such as laser power and scanning speed, an annular hollow laser beam exhibits unique physical characteristics, including hollow ratio and hollow area. The selection of the inner and outer annular radii of the laser plays a critical role in the study of metal surface heat treatment. From the point of view of heat transfer, the entransy dissipation theory is introduced in the metal surface treatment process with an annular hollow heat source. Firstly, using the principle of the extreme value of the entransy dissipation rate, under a constant heat flux boundary condition, the entransy dissipation rate is obtained through the temperature field distribution in the calculation area by numerical simulation. Secondly, the selection of the inner and outer ring radii of the annular laser is explored, and the average temperature difference of the heating surface is minimized to reduce the thermal stresses of the material. This paper seeks new insights into the geometric parameters of the inner and outer radii of the annular heat source. Full article
(This article belongs to the Special Issue Advances in Numerical and Experimental Modelling of Fluid Flow and Heat Transfer)
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