Heat and Mass Transfer in Engineering

Topic Information

Dear Colleagues,

Modern Engineering relies heavily on a comprehensive understanding of heat and mass transfer processes occurring in various media. The present Topic aims to present readers with recent achievements in this field. The Editors solicit contributions from a wide spectrum of approaches, including both fundamental and applied, theoretical, experimental, and computational investigations. Accepted papers are expected to cover heat and mass transfer processes occurring in different media, such as solids, liquids, gases, plasma, multi-phase flows, and porous media. We would be particularly interested in recently emerging hot topics such as non-Fourier models of heat transfer, heat and mass transfer at micro- and nano- scales, and others.

Prof. Dr. Vasily Novozhilov
Prof. Dr. Xiaohu Yang
Topic Editors

Keywords

Participating Journals

Journal Name	Impact Factor	CiteScore	Launched Year	First Decision (median)	APC
Applied Sciences applsci	2.5	5.3	2011	18.4 Days	CHF 2400	Submit
Energies energies	3.0	6.2	2008	16.8 Days	CHF 2600	Submit
Fluids fluids	1.8	3.4	2016	21.1 Days	CHF 1800	Submit
Mathematics mathematics	2.3	4.0	2013	18.3 Days	CHF 2600	Submit
Processes processes	2.8	5.1	2013	14.9 Days	CHF 2400	Submit

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Published Papers (1 paper)

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All Applied Sciences Energies Fluids Mathematics Processes

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26 pages, 8989 KiB  

Open AccessArticle

Enhancement of Heat Transfer Using Water/Graphene Nanofluid and the Impact of Passive Techniques—Experimental, Numerical, and ML Approaches

by Javed Syed

Energies 2025, 18(1), 77; https://doi.org/10.3390/en18010077 - 28 Dec 2024

Viewed by 1165

Abstract

This study examines heat transfer characteristics by employing a combined augmentation technique that utilises nozzle-type inserts to induce swirling in water/graphene nanofluids at different concentrations. The assessment evaluates its influence on heat transfer, Nusselt number, and thermal performance factor, emphasising its applicability in [...] Read more.

This study examines heat transfer characteristics by employing a combined augmentation technique that utilises nozzle-type inserts to induce swirling in water/graphene nanofluids at different concentrations. The assessment evaluates its influence on heat transfer, Nusselt number, and thermal performance factor, emphasising its applicability in industrial contexts. This research aims to create a numerical model designed to improve the performance of heat exchangers by employing passive techniques, particularly through the implementation of a convergent–divergent nozzle insert, without the need for experimental validation. The accuracy of the model is confirmed through experimental data, and it is subsequently employed to simulate various Reynolds numbers, generating datasets for training and testing machine learning models. This study also highlights the potential aggregation and flow resistance limitations when combining nanoparticles with passive inserts. The experimental outcomes for the convergent nozzle insert are employed to validate the supervised machine learning model. Subsequently, a numerical analysis of the convergent–divergent nozzle insert is conducted using approximately 220 samples for training and testing purposes. The convergent–divergent nozzle insert improves heat transfer efficiency in heat exchangers by generating high-velocity flow and enhancing temperature gradients. Optimising nozzle geometry through numerical simulations can determine the ideal dimensions for better heat transfer rates. Nanofluids show a thermal performance factor increase of up to 13.2% at higher inlet temperatures than water. The thermal performance factor for nanofluid at inlet higher temperatures is 8.5%, 9.3%, 11.6%, 12.8%, and 13.2% compared to water. Full article

(This article belongs to the Topic Heat and Mass Transfer in Engineering)

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