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Journals
Processes
Special Issues
CFD Applications in Heat Transfer Research and Simulation
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CFD Applications in Heat Transfer Research and Simulation

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Energy Systems".

Deadline for manuscript submissions: closed (20 December 2023) | Viewed by 4770

Special Issue Editor

Dr. Alfredo Iranzo

E-Mail Website
Guest Editor
Energy Engineering Department, School of Engineering, University of Sevilla, 41092 Sevilla, Spain
Interests: energy engineering; computational fluid dynamics; heat transfer; PEM fuel cells; solar reactors
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Computational fluid dynamics (CFD) has been firmly established as a fundamental discipline for advancing research on heat transfer. The major progresses achieved during the last two decades, both in software modeling capabilities and hardware computing power, have resulted in a considerable and wide spread of CFD interest among scientists and engineers. Numerical modeling and simulation developments are increasingly contributing to the current state of the art in many heat transfer scientific and engineering aspects, such as electronics cooling, heat exchangers, power generation, combustion, concentrated solar power, gas and steam turbines, fuel cells, and many others. As an example, over 1000 journal publications are published every year with the latest scientific developments and applications of CFD for heat transfer research.

This Special Issue on “CFD Applications in Heat Transfer Research and Simulation” aims to provide the latest significant advances in the applications of computational fluid dynamics in heat transfer. Topics include, but are not limited to:

  • CFD fundamentals;
  • CFD applications in electronics cooling;
  • CFD applications in heat exchangers;
  • CFD applications in power generation, combustion, and rotating machinery;
  • CFD simulations of devices and processes for heat transfer enhancement.

Dr. Alfredo Iranzo
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. Processes 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.

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (3 papers)

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Research

15 pages, 1598 KiB  
Article
Modeling of Oxidative Coupling of Methane for Manufacture of Olefins—Part I: CFD Simulations
by Tahyná B. Fontoura, Normando J. C. De Jesus and José Carlos Pinto
Processes 2023, 11(8), 2505; https://doi.org/10.3390/pr11082505 - 20 Aug 2023
Cited by 2 | Viewed by 1172
Abstract
This paper presents a comprehensive computational fluid dynamics (CFD) model for describing the oxidative coupling of methane (OCM) carried out in fixed-bed reactors for olefin production. Initially, a single pellet model was developed and implemented to describe the heat and mass transfer within [...] Read more.
This paper presents a comprehensive computational fluid dynamics (CFD) model for describing the oxidative coupling of methane (OCM) carried out in fixed-bed reactors for olefin production. Initially, a single pellet model was developed and implemented to describe the heat and mass transfer within the pellet and between the gaseous and solid phases. Subsequently, sensitivity analyses were performed to assess the impact of pellet arrangement and feed conditions on the heat and mass transfer rates, subsequently affecting concentration and temperature profiles. As indicated by the simulations, a high ethylene content could be obtained with the increase in the CH4/O2 ratio, aligning well with previous experimental studies. Furthermore, it was observed that pellet arrangement can significantly affect the reactor performance. Additionally, the behavior of temperature and concentration in the gaseous and solid phases can be very different, such that pseudo-homogeneous modeling approaches should not be assumed a priori. Finally, the simulated temperature differences between the gaseous and solid phases were very substantial and above 100 °C, indicating the occurrence of catalyst auto-ignition behavior. Full article
(This article belongs to the Special Issue CFD Applications in Heat Transfer Research and Simulation)
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21 pages, 6361 KiB  
Article
Mathematical Investigation of Heat Transfer Characteristics and Parameter Optimization of Integral Rolled Spiral Finned Tube Bundle Heat Exchangers
by Danfeng Zhang, Wenchang Wu, Liang Zhao and Hui Dong
Processes 2023, 11(7), 2192; https://doi.org/10.3390/pr11072192 - 21 Jul 2023
Cited by 1 | Viewed by 1572
Abstract
In this study, the effects of fin tip thickness and fin root thickness of integral rolled spiral finned tube bundles on flow resistance, heat transfer performance and heat transfer and flow exergy destruction were investigated via mathematical simulation. The correlations between heat transfer [...] Read more.
In this study, the effects of fin tip thickness and fin root thickness of integral rolled spiral finned tube bundles on flow resistance, heat transfer performance and heat transfer and flow exergy destruction were investigated via mathematical simulation. The correlations between heat transfer and flow resistance performance were fitted with dimensionless numbers. The optimized parameters with performance evaluation criteria (PEC) as the objective were obtained using methods involving computational fluid dynamics and machine learning. The results show the effects of fin tip thickness and fin root thickness on the Nusselt number (Nu), Euler number (Eu), PEC, heat transfer exergy destruction (ExT) and flow exergy destruction (ExP) as obtained via mathematical simulation. A new mathematical correlation is proposed for predicting the Nu and Eu of integral rolled spiral finned tube bundles. Among the four optimization models tested, the random forest regression algorithm was the most accurate algorithm for PEC prediction models. In the studied range, the optimal parameters were a fin tip thickness of 2 mm and a fin root thickness of 3.5 mm. Compared with the initial parameters, when the Reynolds number was 20,380, the PEC increased by 2.53%, the ExP increased by 2.37% and the ExT decreased by 7.96%. Full article
(This article belongs to the Special Issue CFD Applications in Heat Transfer Research and Simulation)
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12 pages, 35594 KiB  
Article
The Mechanism Research of Low-Frequency Pressure Oscillation in the Feeding Pipe of Cryogenic Rocket Propulsion System
by Chengfeng Zhu, Yanzhong Li, Fushou Xie, Lei Wang and Yuan Ma
Processes 2022, 10(11), 2448; https://doi.org/10.3390/pr10112448 - 18 Nov 2022
Cited by 4 | Viewed by 1450
Abstract
In the propulsion system of cryogenic liquid rockets, low-frequency pressure oscillation is a long-standing issue occurring in its feeding pipe, and is not conducive to the normal operation of the rocket. Its mechanism and excitation process are not very clear due to the [...] Read more.
In the propulsion system of cryogenic liquid rockets, low-frequency pressure oscillation is a long-standing issue occurring in its feeding pipe, and is not conducive to the normal operation of the rocket. Its mechanism and excitation process are not very clear due to the limitation of the existing numerical method and the difficulty of the real dynamic experiment. Inspired by the periodic suck-back flow phenomenon of steam condensation, the fluctuation of the two-phase interface might be the crucial factor to initiate the low-frequency pressure oscillation. To simulate this interfacial characteristic of cryogenic propellant, a novel numerical model is proposed to predict the mass transfer rate weighted by the interfacial curvature. Aiming at the oxygen jet condensation simulation, the low-frequency pressure oscillation phenomenon is obtained successfully with the excitation frequency of 10.6 Hz, consistent with the natural frequency of the engine test run. It is conducted so the low-frequency pressure oscillation is caused by the periodic condensation of the continuous oxygen vapour plume, along with an oxygen suck-back flow phenomenon. In addition, the results indicate that both the oxygen and liquid oxygen mass flux promote the rise in the frequency of pressure oscillation. These conclusions provide theoretical instructions for the design and operation of the propulsion system of a cryogenic liquid rocket. Full article
(This article belongs to the Special Issue CFD Applications in Heat Transfer Research and Simulation)
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