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High-Performance Numerical Simulation in Heat Transfer

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Special Issue Editors

Special Issue Information

Dear Colleagues,

Thermal management plays a crucial role in various energy systems, including air conditioning, heating and cooling, chemical processing, energy storage, and electricity production. Heat transfer determines energy saving, taking into account energy generation, utilization, conversion, storage, and transmission. Additionally, developments in this field promise to reduce greenhouse gas emissions, especially of carbon dioxide and methane. Heat transfer is also essential in many other physical and chemical phenomena such as fluid flow, mass transfer, phase change, chemical reaction, combustion, radiation, ultrasound propagation, etc. Computational simulations are still widely applied to the optimization of these issues and to improving overall system performance and efficiency.

This Special Issue aims to collect articles focused on the numerical modeling of heat transfer in industrial and natural systems alike. Both review and research papers are welcome.

Dr. Marzena Iwaniszyn
Dr. Mateusz Korpyś
Guest Editors

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

CFD modeling and simulation
heat transfer
fluid flow
thermal management
transport phenomena
conversion
environmental and industrial processes
energy systems
theoretical and experimental analysis

Published Papers (2 papers)

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Research

Jump to: Review

28 pages, 13282 KiB

Open AccessArticle

Large-Eddy vs. Reynolds-Averaged Navier–Stokes Simulations of Flow and Heat Transfer in a U-Duct with Unsteady Flow Separation

by Kenny S. Hu and Tom I-P. Shih

Energies 2024, 17(10), 2414; https://doi.org/10.3390/en17102414 - 17 May 2024

Viewed by 207

Abstract

Large-eddy simulation (LES) and Reynolds-Averaged Navier–Stokes (RANS) equations were used to study incompressible flow and heat transfer in a U-duct with a high-aspect-ratio trapezoidal cross section. For the LES, the WALE subgrid-scale model was employed, and its inflow boundary condition was provided by a concurrent LES of incompressible fully-developed flow in a straight duct with the same cross section and flow conditions as the U-duct. LES results are presented for turbulent kinetic energy, Reynolds stresses, pressure–strain rate, turbulent diffusion, turbulent transport, and velocity–temperature correlations, with a focus on how they are affected by the U-turn region of the U-duct. The LES results were also used to assess three commonly used RANS models: the realizable k-ε with the two-layer model in the near-wall region, the two-equation shear-stress transport model, and the seven-equation stress-omega Reynolds stress model. Results obtained show steady and unsteady RANS to incorrectly predict the effects of unsteady flow separation. The results obtained also identified the terms in the RANS models that need to be modified and suggested how turbulent diffusion should be modeled when there is unsteady flow separation. Full article

(This article belongs to the Special Issue High-Performance Numerical Simulation in Heat Transfer)

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Review

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30 pages, 5431 KiB

Open AccessReview

Achievements and Prospects of Molecular Dynamics Simulations in Thermofluid Sciences

by Yunmin Ran and Volfango Bertola

Energies 2024, 17(4), 888; https://doi.org/10.3390/en17040888 - 14 Feb 2024

Viewed by 943

Abstract

In the last decades, molecular dynamics (MD) simulations established as an important tool for solving fluid flow and heat transfer problems at the nanoscale, with a significant perspective impact on a wide range of industrial and scientific applications. As usual, this happened with several scholarly papers on this topic being published in the same period. The present article provides a thorough review of molecular dynamics (MD) simulations in the domain of fluid flow and heat transfer. In the first section, a survey of the physical modelling of heat transfer phenomena by MD simulations is presented, focusing on bubble and droplet nucleation and interfacial thermal behaviours. Subsequently, MD simulations of fluid flow and heat transfer in nanochannels are discussed, including adiabatic flow, convective heat transfer, and two-phase flow. Particular emphasis was placed on critical phenomena such as evaporation and condensation, to assess the effects of confinement within nanochannels. Finally, some of the current and emerging challenges in MD simulations and suggests future research directions are discussed. Full article

(This article belongs to the Special Issue High-Performance Numerical Simulation in Heat Transfer)

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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Design and optimization of the fireplace inserts, with a closed combustion chamber, by CFD modelling
Authors: A.Klimanek 1, M.Rojczyk 1, M. Lemanowicz 2, M.Stec 2, R.Kubica 2
Affiliation: 1. Department of Thermal Technology, Silesian University of Technology 2. Department of Chemical Engineering and Process Design, Silesian University of Technology
Abstract: The paper provides the results of research on design and optimization of the furnace geometry by CFD modelling, with the use a simplified model of combustion process. At first, the CFD model was validated based on experimental measurements performed on a full scale fireplace insert. Such approach resulted in a rapid prototyping tool used to redesign the number of different types of fireplace inserts. The simulations were performed for four selected construction variants, including straight, sided and vertical inserts as well as an insert with a water jacket. The newly developed design solutions were subjected to product testing according to relevant standards which proved that all devices fulfill strict ECODESIGN requirements.

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