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Fluids
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Convective Flows and Heat Transfer
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Convective Flows and Heat Transfer

A special issue of Fluids (ISSN 2311-5521).

Deadline for manuscript submissions: 31 March 2025 | Viewed by 878

Special Issue Editors

Prof. Dr. Abdelkader Mojtabi

E-Mail Website
Guest Editor
Toulouse Institute of Fluid Mechanics, University Paul Sabatier, Toulouse, France
Interests: convective heat transfer; hydrodynamic stability; double diffusion; thermo gravitation
Prof. Dr. Rachid Bennacer

E-Mail Website
Guest Editor
CNRS (Centre National de la Recherche Scientifique), LMT (Laboratoire de Mécanique et Technologie—Labo. Méca. Tech.), Université Paris-Saclay, ENS (Ecole National Supérieure) Paris-Saclay, 91190 Gif-sur-Yvette, France
Interests: convective heat transfer; porous media; biomaterials; energy/building
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Convective heat transfer is involved not only in many industrial applications but also in multiple scientific problems of a fundamental nature. Convective heat transfer within multi-constituent fluids generally leads to convective mass transfer, coupled eventually with heat transfer.

This Special Issue is dedicated to recent scientific contributions and theoretical (hydrodynamic stability), numerical (F.E., F.V, and spectral method), and experimental advances in the field of anisothermal fluid flow and convective heat and mass transfers.

In this regard, this Special Issue of Fluids on ‘Convective Flows and Heat Transfer’ provides an overview of the current integration of research on fundamental and applied aspects of energy and materials. This edition follows previous issues and captures some of the recent advancements in convective heat transfer within multi-component fluids, which often involves coupled convective mass and heat transfer. Additionally, it serves as a platform to address selected multidisciplinary challenges and aims to answer open questions at the intersection of various disciplines. Such convective transfer is the key parameter in most material processes and has become central in the recent developments in energy production, storage, and transformation. Indoor/outdoor Air quality, environment, and building energy-reducing demand are the other important applications.

Additionally, this Special Issue will also publish selected papers from the 2024 International Conference on Materials and Energy (ICOME2024, https://www.icome2024.com/), held from October 30 to November 1, 2024, in Bangkok, Thailand.

Prof. Dr. Abdelkader Mojtabi
Prof. Dr. Rachid Bennacer
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. Fluids 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 1800 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

  • gravitational flow
  • instabilities and bifurcations
  • computational heat and fluid dynamics (CHT/CFD)
  • newtonian and non-newtonian fluids
  • storing energy
  • material and biomaterial processing
  • renewable energy
  • indoor/outdoor air quality (I/OAQ)

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Published Papers (1 paper)

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Research

16 pages, 2416 KiB  
Article
On the Numerical Investigation of Natural-Convection Heat Sinks Across a Wide Range of Flow and Operating Conditions
by Louis Dewilde, Syed Mughees Ali, Rajesh Nimmagadda and Tim Persoons
Fluids 2024, 9(11), 252; https://doi.org/10.3390/fluids9110252 - 28 Oct 2024
Viewed by 539
Abstract
Many designs for natural-convection heat sinks and semi-empirical correlations have been proposed in the recent years, but they are only valid in a limited range of Elenbaas numbers El and were mostly tested for laminar flows. To alleviate those limits, parametric studies [...] Read more.
Many designs for natural-convection heat sinks and semi-empirical correlations have been proposed in the recent years, but they are only valid in a limited range of Elenbaas numbers El and were mostly tested for laminar flows. To alleviate those limits, parametric studies with 2D and quasi-3D models were carried out, in ranges of Grashof numbers up to 1.55×1011 and Elenbaas numbers up to 3.42×107. Ansys Fluent’s laminar, transition-SST, SST k-ω and k-ϵ models were applied. In addition, when used in this valid range, i.e., mean Elenbaas numbers, with the simplified quasi-3D model, the transition-SST model could predict better results, overestimating the heat flux by 10 to 15% compared to semi-empirical correlations. The 2D model was not deemed satisfying, regarding turbulence models. Consequently, a quasi-3D model was developed: it appeared to be an efficient trade-off between computational time and prediction accuracy, in particular for turbulence models. New grouping factors were also found, to ensure proper dimensioning of natural-convection heat sinks. They corresponded to non-dimensional parameters that dictated the physical behaviour of the heat sink with respect to the semi-empirical correlations. Typically, the ratio of the spacing to the optimal spacing predicted by Bar-Cohen’s correlation turned out to be an appropriate grouping factor with a threshold of 1, above which the fins could safely be considered as isolated, thus greatly simplifying all further calculations. Full article
(This article belongs to the Special Issue Convective Flows and Heat Transfer)
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