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Heat and Mass Transfer Issues in Mini Gaps 2021-2022

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 (30 March 2022) | Viewed by 6989

Special Issue Editor


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Guest Editor
Faculty of Mechatronics and Mechanical Engineering, Kielce University of Technology, Al. Tysiaclecia Panstwa Polskiego 7, 25-314 Kielce, Poland
Interests: heat transfer; minichannels; minigaps; compact heat exchangers; two-phase flow; heat transfer enhancement; temperature measurement; computational methods for solving inverse heat transfer problems; thermal and production engineering; quality management tools
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Special Issue Information

Dear Colleagues,

The transfer of large heat fluxes is one of the most significant issues with modern technology. In recent years, the range of applications for heat transfer through mini gaps with different geometries has broadened considerably, extending to a new generation of systems. The trend toward the miniaturization of the components of mechanical and electronic equipment has been the driving force behind the development of increasingly better cooling technologies that are designed to prevent maximum allowable operating temperatures from being exceeded. Theoretical analyses, experimental measurements, and practical applications have been performed to help us to understand heat and mass transfer phenomena in mini gaps. The results of these studies provide us with information about the design of cooling systems that use minichannel devices and can be applied in cooling, thermostabilization, and thermoregulation. Despite the growing number of new studies dealing with heat and mass transfer in mini gaps, the results refer mainly to a narrow range of parameters. Results concerning heat and mass transfer during fluid flow along mini gaps are inconsistent or even contradictory. Studies that concentrate on systems with an enhanced structure have attracted attention due to their potential to enhance heat transfer.

I invite you to submit an article for publication in a Special Issue of Energies on the subject of “Heat and Mass Transfer Issues in Mini Gaps 2021-2022”. Topics of interest include:

  • Heat and mass transfer;
  • Boiling and condensation;
  • Heat transfer by convection;
  • Heat transfer enhancement;
  • Multiphase flow;
  • Unsteady flow and instabilities;
  • Methods for identifying two-phase flow structures;
  • Computational methods for solving heat and mass transfer problems;
  • Prediction of correlations between heat transfer and pressure drops; and
  • Practical applications.

Original articles containing experimental research, case studies, theoretical analyses, computational methods, practical applications, or other discussions on heat and mass transfer in mini gaps are strongly encouraged.

Prof. Dr. Magdalena Piasecka
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

  • heat transfer
  • mini gaps
  • mini channels
  • boiling
  • condensation
  • convection
  • two-phase flow
  • heat transfer enhancement
  • experimental
  • numerical
  • correlation
  • unsteady flow
  • instabilities

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Published Papers (2 papers)

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Research

20 pages, 7597 KiB  
Article
Experimental Study and CFD Modeling of Fluid Flow and Heat Transfer Characteristics in a Mini-Channel Heat Sink Using Simcenter STAR-CCM+ Software
by Magdalena Piasecka, Artur Piasecki and Norbert Dadas
Energies 2022, 15(2), 536; https://doi.org/10.3390/en15020536 - 12 Jan 2022
Cited by 17 | Viewed by 4197
Abstract
The present work describes an experimental study and CFD modeling of fluid flow and heat transfer characteristics in a heat sink with several asymmetrical heated mini-channels. The data from the experimental research were the basis for numerical calculations. During experiments, the temperature measurement [...] Read more.
The present work describes an experimental study and CFD modeling of fluid flow and heat transfer characteristics in a heat sink with several asymmetrical heated mini-channels. The data from the experimental research were the basis for numerical calculations. During experiments, the temperature measurement of the outer heater surface was performed by infrared thermography to verify the results of numerical calculations performed in Simcenter STAR-CCM+ software. The main objective was to determine the values of the parameters tested to evaluate the intensity of the heat transfer processes. In the numerical simulations, important variables, mainly the working fluid, heater material, the spatial orientation of the test section, and the number of mini-channels, were assumed. The results of the numerical computations were discussed. Due to simulations, it was possible to indicate which parameters tested in terms of heat transfer turned out to be the most effective. Furthermore, a mesh dependency analysis based on the grid convergence index (GCI) was performed. The residuals, as good indicators of convergence, achieved low values. Generally, the data presented showed satisfactory convergence of the results achieved as a result of the computational procedure. Full article
(This article belongs to the Special Issue Heat and Mass Transfer Issues in Mini Gaps 2021-2022)
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18 pages, 3595 KiB  
Article
Boiling of FC-72 on Surfaces with Open Copper Microchannel
by Robert Kaniowski and Robert Pastuszko
Energies 2021, 14(21), 7283; https://doi.org/10.3390/en14217283 - 3 Nov 2021
Cited by 10 | Viewed by 2069
Abstract
The paper presents the results of experimental research on pool boiling heat transfer of dielectric liquid FC-72. Measurements were made at atmospheric pressure on open surfaces with microchannels. Heat transfer surfaces, in the form of parallel milled microchannels, were made of copper. The [...] Read more.
The paper presents the results of experimental research on pool boiling heat transfer of dielectric liquid FC-72. Measurements were made at atmospheric pressure on open surfaces with microchannels. Heat transfer surfaces, in the form of parallel milled microchannels, were made of copper. The rectangular cross-sectional microchannels were 0.2 to 0.5 mm deep and 0.2 to 0.4 mm wide. The surfaces, compared to a smooth flat surface, provided a five-fold increase in the heat transfer coefficient and a two-fold increase in the critical heat flux. The article analyses the influence of the width and height of the microchannel on the heat transfer process. The maximum heat flux was 271.7 kW/m2, and the highest heat transfer coefficient obtained was 25 kW/m2K. Furthermore, the experimental results were compared with selected correlations for the nucleate pool boiling. Full article
(This article belongs to the Special Issue Heat and Mass Transfer Issues in Mini Gaps 2021-2022)
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