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Symmetry
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Symmetry in Thermal Fluid Sciences and Energy Applications
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Symmetry in Thermal Fluid Sciences and Energy Applications

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Engineering and Materials".

Deadline for manuscript submissions: 30 November 2024 | Viewed by 273

Special Issue Editor

Prof. Dr. Nattan Roberto Caetano

E-Mail Website
Guest Editor
Department of Mechanical Engineering, Federal University of Santa Maria, Roraima Avenue 1000, Santa Maria 97105-900, RS, Brazil
Interests: thermodynamics; applied optical techniques; diagnose combustion

Special Issue Information

Dear Colleagues,

Symmetry is a fundamental notion in thermal fluid sciences and energy applications. It is an important tool for elucidating the properties of complex systems. Thermal and fluid processes are applied in several modern energy-use technologies, basically consisting of the complex multidimensional interactions of fluid mechanics and thermodynamics. A comprehensive analysis of this topic involves vector and scalar quantities in the flow field, where symmetry is strongly considered in order to simplify geometric parameters. These requirements are therefore also applied to experimental techniques. The interconnection between experimental analysis and the numerical simulation of processes is also an important field. Thus, there are a wide range of symmetry solutions for this area of ​​research, the results of which contribute to the development of science and information for decision-making in industry.

Prof. Dr. Nattan Roberto Caetano
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. Symmetry 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 2400 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

  • thermal and fluid science
  • energy production and use
  • fuels and combustion
  • diagnostic techniques of measurement
  • analysis for decision making in industry

Published Papers (1 paper)

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Research

22 pages, 15458 KiB  
Article
Control of Three-Dimensional Natural Convection of Graphene–Water Nanofluids Using Symmetrical Tree-Shaped Obstacle and External Magnetic Field
by Walid Aich, Inès Hilali-Jaghdam, Amnah Alshahrani, Chemseddine Maatki, Badr M. Alshammari and Lioua Kolsi
Symmetry 2024, 16(6), 692; https://doi.org/10.3390/sym16060692 - 4 Jun 2024
Viewed by 130
Abstract
This numerical investigation explores the enhanced control of the 3D natural convection (NC) within a cubic cavity filled with graphene–water nanofluids, utilizing a bottom-center-located tree-shaped obstacle and a horizontal magnetic field (MF). The analysis includes the effects of the Rayleigh number (Ra), the [...] Read more.
This numerical investigation explores the enhanced control of the 3D natural convection (NC) within a cubic cavity filled with graphene–water nanofluids, utilizing a bottom-center-located tree-shaped obstacle and a horizontal magnetic field (MF). The analysis includes the effects of the Rayleigh number (Ra), the solid volume fraction of graphene (φ), the Hartmann number (Ha), and the fins’ length (W). The results show complex flow patterns and thermal behavior within the cavity, indicating the interactive effects of nanofluid properties, the tree-shaped obstacle, and magnetic field effects. The MHD effects reduce the convection, while the addition of graphene improves the thermal conductivity of the fluid, which enhances the heat transfer observed with increasing Rayleigh numbers. The increase in the fins’ length on the heat transfer efficiency is found to be slightly negative, which is attributed to the complex interplay between the enhanced heat transfer surface area and fluid flow disruption. This study presents an original combination of non-destructive methods (magnetic field) and a destructive method (tree-shaped obstacle) for the control of the fluid flow and heat transfer characteristics in a 3D cavity filled with graphene–water nanofluids. In addition, it provides valuable information for optimizing heat transfer control strategies, with applications in electronic cooling, renewable energy systems, and advanced thermal management solutions. The application of a magnetic field was found to reduce the maximum velocity and total entropy generation by about 82% and 76%, respectively. The addition of graphene nanoparticles was found to reduce the maximum velocity by about 5.5% without the magnetic field and to increase it by 1.12% for Ha = 100. Varying the obstacles’ length from W = 0.2 to W = 0.8 led to a reduction in velocity by about 23.6%. Full article
(This article belongs to the Special Issue Symmetry in Thermal Fluid Sciences and Energy Applications)
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