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Numerical Simulations for Thermal Engineering and Thermodynamic Systems

A special issue of Entropy (ISSN 1099-4300). This special issue belongs to the section "Thermodynamics".

Deadline for manuscript submissions: 15 September 2024 | Viewed by 906

Special Issue Editors


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Guest Editor
Laboratory of Applied Thermodynamics, School of Mechanical Engineering, National Technical University of Athens, 9 Heroon Polytechneiou, 15780 Athens, Greece
Interests: thermodynamics; stirling engines; heat transfer; thermal engines; cryogenics; energy engineering; engine modelling and simulations; renewables
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Co-Guest Editor
Applied Thermodynamics Laboratory, School of Mechanical Engineering, National Technical University of Athens, 15780 Athens, Greece
Interests: thermodynamics; cryogenics; engine modelling and simulations; statistical thermodynamics; social physics; low-temperature physics; artificial intelligence
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The Guest Editors of the MDPI Entropy Special Issue “Numerical Simulations for Thermal Engineering and Thermodynamic Systems” are inviting authors to submit work for publication. This publication intends to include a wide range of heat transfer and thermodynamics papers covering both theoretical models as well as applications. Models and simulations of heat transfer are complicated procedures dealing with a lot of different phenomena. Those that this Special Issue is aiming towards can be under the scope of CFD modelling or pure thermodynamical analysis, while applications of informational statistical descriptions of such systems are also of interest.

Overall, the topics of interest for this Special Issue include, but are not limited to:

  • Numerical models of heat exchangers;
  • Modelling and simulations of 1D and 3D thermal engines and refrigeration systems;
  • Numerical solution methods for the engine and thermal designs;
  • Numerical validation/verification of CFD and heat transfer models against simulations or experimental data;
  • Descriptions of heat transfer models at extreme temperature ranges and phases of matter (plasma physics, Bose–Einstein Condensates, superfluids etc.);
  • Mathematical models for novel solutions of heat transfer or thermofluids models;
  • Combination of numerical and AI models for the description of systems (radiation, porous media, heat exchanges etc.);
  • Applications of renewable technologies relating to power production from applications, such as solar cells, under the scope of their thermal behaviour;
  • Derivations of heat transfer properties of materials;
  • Applications of thermodynamic simulations to informational systems.

In this issue, authors can also submit review papers which consider the modelling and simulations of heat transfer or closely related subjects. In terms of review papers, authors are encouraged to contact the editors to verify that the proposed review is of interest to the Issue.

You may choose our Joint Special Issue in Thermo.

Prof. Dr. Emmanouil Rogdakis
Dr. George-Rafael Domenikos
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. Entropy is an international peer-reviewed open access monthly 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

  • thermodynamics
  • heat transfer
  • numerical modelling
  • simulations
  • optimization
  • renewables
  • energy transfer

Published Papers (1 paper)

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Research

17 pages, 3959 KiB  
Article
A Eulerian Numerical Model to Predict the Enhancement Effect of the Gravity-Driven Motion Melting Process for Latent Thermal Energy Storage
by Shen Tian, Bolun Tan, Yuchen Lin, Tieying Wang and Kaiyong Hu
Entropy 2024, 26(2), 175; https://doi.org/10.3390/e26020175 - 19 Feb 2024
Viewed by 676
Abstract
Latent thermal energy storage (LTES) devices can efficiently store renewable energy in thermal form and guarantee a stable-temperature thermal energy supply. The gravity-driven motion melting (GDMM) process improves the overall melting rate for packaged phase-change material (PCM) by constructing an enhanced flow field [...] Read more.
Latent thermal energy storage (LTES) devices can efficiently store renewable energy in thermal form and guarantee a stable-temperature thermal energy supply. The gravity-driven motion melting (GDMM) process improves the overall melting rate for packaged phase-change material (PCM) by constructing an enhanced flow field in the liquid phase. However, due to the complex mechanisms involved in fluid–solid coupling and liquid–solid phase transition, numerical simulation studies that demonstrate physical details are necessary. In this study, a simplified numerical model based on the Eulerian method is proposed. We aimed to introduce a fluid deformation yield stress equation to the “solid phase” based on the Bingham fluid assumption. As a result, fluid–solid coupling and liquid–solid phase transition processes become continuously solvable. The proposed model is validated by the referenced experimental measurements. The enhanced performance of liquid-phase convection and the macroscopic settling of the “solid phase” are numerically analyzed. The results indicate that the enhanced liquid-phase fluidity allows for a stronger heat transfer process than natural convection for the pure liquid phase. The gravity-driven pressure difference is directly proportional to the vertical melting rate, which indicates the feasibility of controlling the pressure difference to improve the melting rate. Full article
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