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Recent Advances in Heat Transfer and Two-Phase Flow Performance

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 (23 May 2023) | Viewed by 2533

Special Issue Editors


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Guest Editor
Department of Mathematics, Quaid-I-Azam University 45320, Islamabad 44000, Pakistan
Interests: fluid mechanics; heat transfer; nano fluids; solutions of differential equations

E-Mail Website
Guest Editor
Department of Mathematics, Quaid-I-Azam University, Islamabad 44000, Pakistan
Interests: heat; flow

Special Issue Information

Dear Colleagues,

Heat transfer in fluid flow problems has recently been widely studied by many researchers. This topic has intrigued the interest of most scientists due to its increasing and prime applications related to industry, engineering and bio-medical applications. The analysis of heat transfer includes the flow inside multiple domains such as the heated flow inside different cavities, the flow inside various corrugated domains, inside cavities with heated obstacles and the blood flow analysis including multiple phases, as well as the peristaltic flow phenomenon with multiple fluctuating boundary conditions. We aim to present some of the research articles concerning the topics of interest, covering an immense number of industrial, engineering and bio-medical applications. 

Prof. Dr. Sohail Nadeem
Dr. Salman Akhtar
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. 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 in cavities with heated obstacles
  • heat transfer in cavities with sinusoidal walls
  • peristaltic flow in multiple conduits having sinusoidal walls
  • blood flow inside various stenosed arteries
  • phase flow phenomenon with heat transfer and nanofluid effects

Published Papers (1 paper)

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Research

19 pages, 1351 KiB  
Article
Volume-of-Fluid Based Finite-Volume Computational Simulations of Three-Phase Nanoparticle-Liquid-Gas Boiling Problems in Vertical Rectangular Channels
by Anele Mavi and Tiri Chinyoka
Energies 2022, 15(15), 5746; https://doi.org/10.3390/en15155746 - 8 Aug 2022
Cited by 5 | Viewed by 1735
Abstract
This study develops robust numerical algorithms for the simulation of three-phase (solid-liquid-gas) boiling and bubble formation problems in rectangular channels. The numerical algorithms are based on the Finite Volume Methods (FVM) and implement both the volume-of-fluid (VOF) methods for liquid-gas interface tracking as [...] Read more.
This study develops robust numerical algorithms for the simulation of three-phase (solid-liquid-gas) boiling and bubble formation problems in rectangular channels. The numerical algorithms are based on the Finite Volume Methods (FVM) and implement both the volume-of-fluid (VOF) methods for liquid-gas interface tracking as well as the volume-fraction methods to account for the concentration of embedded solid nano-particles in the liquid phase. Water is used as the base-liquid and the solid phase is modelled via metallic nano-particles (both aluminium oxide and titanium oxide nano-particles are considered) that are homogeneously mixed within the liquid phase. The gas phase is considered as a vapour arising from the bolling processes of the liquid-phase. The finite volume methodology is implemented on the OpenFOAM software platform, specifically by careful modification and manipulation of existing OpenFOAM solvers. The governing fluid dynamical equations, for the three-phase boiling problem, take into account the thermal conductivity effects of the solid (nano-particle), the momentum and energy equations for both the liquid-phase and the gas-phase, and finally the decoupled mass conservation equations for the liquid- and gas- phases. The decoupled mass conservation equations are specifically used to model the phase change between the liquid- and gas- phases. In addition to the FVM and VOF numerical methodologies for the discretization of the governing equations, the pressure-velocity coupling is resolved via the PIMPLE algorithm, a combination of the Pressure Implicit with Splitting of Operator (PISO) and the Semi-Implicit Method for Pressure-Linked Equations (SIMPLE) algorithms. The computational results are presented graphically with respect to variations in time as well as in the nano-particle volume fractions. The simulations and results accurately capture the formation of vapour bubbles in the two-phase (particle-free) liquid-gas flow and additionally the computational algorithms are similarly demonstrated to accurately illustrate and capture simulated boiling processes. The presence of the nano-particles is demonstrated to enhance the heat-transfer, boiling, and bubble formation processes. Full article
(This article belongs to the Special Issue Recent Advances in Heat Transfer and Two-Phase Flow Performance)
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