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Computation
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Computational Heat, Mass, and Momentum Transfer—III
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Computational Heat, Mass, and Momentum Transfer—III

A special issue of Computation (ISSN 2079-3197). This special issue belongs to the section "Computational Engineering".

Deadline for manuscript submissions: closed (30 November 2021) | Viewed by 20926

Special Issue Editors

Prof. Dr. Rachid Bennacer

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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: energy; technical equipment; fluid mechanics
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Farid Bakir

E-Mail Website
Guest Editor
Arts et Metiers Institute of Technology, CNAM, LIFSE, HESAM University, 75013 Paris, France
Interests: biopolymers; drug eluting stent; drug release mechanisms; cardiovascular diseases; kinetic models; polymer matrix; in-vitro assays
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Smaine Kouidri

E-Mail Website
Guest Editor
Arts et Metiers Institute of Technology, 75013 Paris, France
Interests: turbomachinery; aeroacoustics; energy systems; heat and mass transfer
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Sang-Ho Suh

E-Mail Website
Guest Editor
School of Mechanical Engineering, Soongsil University, Seoul 06978, Korea
Interests: turbomachinery; biofluid dynamics; fluid mechanics
Prof. Dr. Ali Cemal Benim

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Guest Editor
Center of Flow Simulation (CFS), Department of Mechanical and Process Engineering, Duesseldorf University of Applied Sciences, D-40476 Duesseldorf, Germany
Interests: computational methods; combustion; fire; turbulence; multi-phase flows; environmental flow; fluid machinery; biofluid dynamics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue will publish a set of selected papers from the XIII International Conference on Computational Heat, Mass, and Momentum Transfer (ICCHMT 2021), which will be held 18–21 May 2021, in Paris, France (due to the health crisis, the conference may be held online). You are invited to submit a contribution to the conference for consideration in this Special Issue.

Topics of the conferences include but are not limited to the following:

  • Advanced numerical methods;
  • Aeronautical and space applications;
  • Bio-fluidics and biomedical engineering;
  • Bio-inspired flow and heat transfer;
  • Building-integrated energy and power systems;
  • Complex chemical reaction modelling;
  • Compressible flows;
  • Computational thermal fluid dynamics;
  • Convection and buoyancy-driven flows;
  • Double diffusive convection;
  • Energy-saving process;
  • Fluid flow and heat transfer in biomedical devices and biotechnology;
  • Fluid machinery;
  • Granular flows;
  • Heat and mass transfer in energy systems;
  • Heat and mass transfer in manufacturing and materials processing;
  • Heat and mass transfer in nuclear applications;
  • Heat and mass transfer in particle-laden flows;
  • Heat exchangers/heat pipe;
  • Internal flow and heat transfer;
  • Micro/nano heat and mass transfer;
  • Mixing devices and phenomena;
  • Multi-phase flows;
  • Optimization in thermal engineering;
  • Reactive flows and combustion;
  • Thermal flow visualization;
  • Thermal fluid machinery;
  • Thermal heat fluxes;
  • Transport phenomena in porous media;
  • Urban energy flows.

For detailed information on all further aspects of the conference, including the dates, keynote speakers, committees, registration, and accommodation, please check the conference website at https://icchmt2021.com/.

Prof. Dr. Ali Cemal Benim
Prof. Dr. Farid Bakir
Prof. Rachid Bennacer
Prof. Dr. Smaine Kouidri
Prof. Dr. Sang-Ho Suh
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. Computation 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

  • Numerical methods
  • Engineering applications
  • Fluid flow
  • Heat transfer
  • Mass transfer

Published Papers (7 papers)

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Research

16 pages, 5360 KiB  
Article
A Study on the Effect of Geometry and Operating Variables on Density Wave Oscillation in a Supercritical Natural Circulation Loop
by Santosh Kumar Rai, Neha Ahlawat, Raghvendra Upadhyay, Pardeep Kumar and Vinay Panwar
Computation 2022, 10(2), 25; https://0-doi-org.brum.beds.ac.uk/10.3390/computation10020025 - 08 Feb 2022
Cited by 2 | Viewed by 2033
Abstract
Nowadays, a prime technology in generation IV nuclear reactors, the supercritical water reactor (SCWR), is the main object of focus. The current article aims to develop a thermal hydraulic numerical model for predicting density wave oscillation (DWO) in a supercritical water natural circulation [...] Read more.
Nowadays, a prime technology in generation IV nuclear reactors, the supercritical water reactor (SCWR), is the main object of focus. The current article aims to develop a thermal hydraulic numerical model for predicting density wave oscillation (DWO) in a supercritical water natural circulation loop (SCWNCL). A one-dimensional thermal hydraulic mathematical model was developed. The numerical model consists of nonlinear mass, momentum, and energy conservation equations, which were discretized by applying the implicit finite difference technique. The numerical model was validated with experimental results, and numerical simulations were carried out to find the marginal stability boundary (MSB) and draw the stability map for the loop. Further, the effects of geometry (i.e., diameter and hot leg length) and operating parameters (i.e., inlet system pressure and friction factor) on the density wave oscillation of the SCWNCL were analyzed. Full article
(This article belongs to the Special Issue Computational Heat, Mass, and Momentum Transfer—III)
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18 pages, 9288 KiB  
Article
New Design and Optimization of a Jet Pump to Boost Heavy Oil Production
by Jens Toteff, Miguel Asuaje and Ricardo Noguera
Computation 2022, 10(1), 11; https://0-doi-org.brum.beds.ac.uk/10.3390/computation10010011 - 14 Jan 2022
Cited by 4 | Viewed by 3703
Abstract
In the Oil and Gas industry, installing pipe loops is a well-known hydraulic practice to increase oil pipeline capacities. Nevertheless, pipe loops could promote an unfavorable phenomenon known as fouling. That means that in a heavy oil-water mixture gathering system with low flow [...] Read more.
In the Oil and Gas industry, installing pipe loops is a well-known hydraulic practice to increase oil pipeline capacities. Nevertheless, pipe loops could promote an unfavorable phenomenon known as fouling. That means that in a heavy oil-water mixture gathering system with low flow velocities, an oil-water stratified flow pattern will appear. In consequence, due to high viscosity, the oil stick on the pipe, causing a reduction of the effective diameter, reducing handled fluids production, and increasing energy consumption. As jet pumps increase total handled flow, increase the fluid velocities, and promote the homogenous mixture of oil and water, this type of pump could result attractive compared to other multiphase pump systems in reactivating heavy crude oil transport lines. Jet pumps are highly reliable, robust equipment with modest maintenance, ideal for many applications, mainly in the oil and gas industry. Nevertheless, their design method and performance analysis are rarely known in the literature and keep a high experimental component similar to most pumping equipment. This paper proposes a numerical study and the optimization of a booster multiphase jet pump system installed in a heavy oil conventional loop of a gathering system. First, the optimization of a traditionally designed jet pump, combining CFD simulation and optimization algorithms using commercials software (ANSYS CFX® and PIPEIT® tool), has been carried out. This method allowed evaluating the effect of multiple geometrical and operational variables that influence the global performance of the pump to run more than 400 geometries automatically in a reduced time frame. The optimized pump offers a substantial improvement over the original concerning total flow capacity (+17%), energy, and flow distribution. Then, the effect of the three jet pump plugin configurations in a heavy oil conventional trunkline loop was analyzed. Simulations were carried out for different driving fluid pressures and compared against a traditional pipeline loop’s performance. Optimum plugin connection increases fluid production by 30%. Finally, a new eccentric jet pump geometry has been proposed to improve exit velocities and pressure fields. This eccentric jet pump with the best connection was analyzed over the same conditions as the concentric optimized one. An improvement of 2% on handled fluid was achieved consistently with the observed uniform velocity field at the exit of the pump. A better total fluid distribution between the main and the loop line is obtained, handling around half of the complete fluid each. Full article
(This article belongs to the Special Issue Computational Heat, Mass, and Momentum Transfer—III)
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26 pages, 7423 KiB  
Article
Analysis of Thermal Performances in a Ventilated Room Using LBM-MRT: Effect of a Porous Separation
by Zouhira Hireche, Nabil Himrane, Lyes Nasseri, Yasmine Hamrioui and Djamel Eddine Ameziani
Computation 2022, 10(1), 4; https://0-doi-org.brum.beds.ac.uk/10.3390/computation10010004 - 10 Jan 2022
Cited by 3 | Viewed by 1975
Abstract
This article demonstrates the feasibility of porous separation on the performance of displacement ventilation in a rectangular enclosure. A jet of fresh air enters the cavity through an opening at the bottom of the left wall and exits through an opening at the [...] Read more.
This article demonstrates the feasibility of porous separation on the performance of displacement ventilation in a rectangular enclosure. A jet of fresh air enters the cavity through an opening at the bottom of the left wall and exits through an opening at the top of the right wall. The porous separation is placed in the center of the cavity and its height varies between 0.2 and 0.8 with three values of thickness, 0.1, 0.2, and 0.3. The heat transfer rate was calculated for different intervals of Darcy (10−6 ≤ Da ≤ 10), Rayleigh (10 ≤ Ra ≤ 106), and Reynolds (50 ≤ Re ≤ 500) numbers. The momentum and the energy equations were solved by the lattice Boltzmann method with multiple relaxation times (LB-MRT). Schemes D2Q9 and D2Q5 were chosen for the velocity and temperature fields, respectively. For porous separation, the generalized Darcy–Brinkman–Forchheimer model was adopted. It is represented by a term added in the standard LB equations. For the dynamic domain, numerical simulations revealed complex flow structures depending on all control parameters. The results showed that the thermal field, mainly in the second compartment, is very dependent on the size and permeability of the porous separation. However, they have no influence on the transfer rate. Full article
(This article belongs to the Special Issue Computational Heat, Mass, and Momentum Transfer—III)
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14 pages, 3187 KiB  
Article
On Numerical Modeling of Thermal Performance Enhancementof a Heat Thermal Energy Storage System Using a Phase Change Material and a Porous Foam
by Riheb Mabrouk, Hassane Naji, Hacen Dhahri and Zouhir Younsi
Computation 2022, 10(1), 3; https://0-doi-org.brum.beds.ac.uk/10.3390/computation10010003 - 10 Jan 2022
Cited by 2 | Viewed by 2215
Abstract
In this investigation, a comprehensive numerical analysis of the flow involved in an open-ended straight channel fully filled with a porous metal foam saturated and a phase change material (paraffin) has been performed using a single relaxation time lattice Boltzmann method (SRT-LBM) at [...] Read more.
In this investigation, a comprehensive numerical analysis of the flow involved in an open-ended straight channel fully filled with a porous metal foam saturated and a phase change material (paraffin) has been performed using a single relaxation time lattice Boltzmann method (SRT-LBM) at the representative elementary volume (REV) scale. The enthalpy-based approach with three density functions has been employed to cope with the governing equations under the local thermal non-equilibrium (LTNE) condition. The in-house code has been validated through a comparison with a previous case in literature. The pore per inch density (10≤PPI≤60) and porosity (0.7≤ε≤0.9) effects of the metal structure were analyzed during melting/solidifying phenomena at two Reynolds numbers (Re = 200 and 400). The relevant findings are discussed for the LTNE intensity and the entropy generation rate (Ns). Through the simulations, the LTNE hypothesis turned out to be secure and valid. In addition, it is maximum for small PPI value (=10) whatever the parameters deemed. On the other hand, high porosity (=0.9) is advised to reduce the system’s irreversibility. However, at a moderate Re (=200), a small PPI (=10) would be appropriate to mitigate the system irreversibility during the charging case, while a large value (PPI = 60) might be advised for the discharging case. In this context, it can be stated that during the melting period, low porosity (=0.7) with low PPI (=10) improves thermal performance, reduces the system irreversibility and speeds up the melting rate, while for high porosity (=0.9), a moderate PPI (=30) should be used during the melting process to achieve an optimal system. Full article
(This article belongs to the Special Issue Computational Heat, Mass, and Momentum Transfer—III)
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14 pages, 5447 KiB  
Article
Numerical Study on the Thermal Field and Heat Transfer Characteristics of a Hexagonal-Close-Packed Pebble Bed
by Leisheng Chen, Jiahao Zhao, Yuejin Yuan and Jaeyoung Lee
Computation 2022, 10(1), 1; https://0-doi-org.brum.beds.ac.uk/10.3390/computation10010001 - 05 Jan 2022
Cited by 4 | Viewed by 2192
Abstract
Fuel elements in a high-temperature gas-cooled reactor (HTGR) core may be stacked with a hexagonal close-packed (HCP) structure; therefore, analyzing the temperature distribution and heat transfer efficiency in the HCP pebble bed is of great significance to the design and safety of HTGR [...] Read more.
Fuel elements in a high-temperature gas-cooled reactor (HTGR) core may be stacked with a hexagonal close-packed (HCP) structure; therefore, analyzing the temperature distribution and heat transfer efficiency in the HCP pebble bed is of great significance to the design and safety of HTGR cores. In this study, the heat transfer characteristics of an HCP pebble bed are studied using CFD. The thermal fields and convective heat transfer coefficients under different coolant inlet velocities are obtained, and the velocity fields in the gap areas are also analyzed in different planes. It is found that the strongest heat transfer is shown near the right vertices of the top and bottom spheres, while the weakest heat transfer takes place in areas near the contact points where no fluid flows over; in addition, the correlation of the overall heat transfer coefficient with the Reynolds number is proposed as havg = 0.1545(k/L)Re0.8 (Pr = 0.712, 1.6 × 104 ≤ Re ≤ 4 × 104). It is also found that the heat transfer intensity of the HCP structure is weaker than that of the face-centered-cubic structure. These findings provide a reference for reactor designers and will contribute to the development of safer pebble-bed cores. Full article
(This article belongs to the Special Issue Computational Heat, Mass, and Momentum Transfer—III)
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17 pages, 8118 KiB  
Article
Numerical Analysis of a Novel Twin-Impeller Centrifugal Compressor
by Van Thang Nguyen, Amélie Danlos, Florent Ravelet, Michael Deligant, Moises Solis, Sofiane Khelladi and Farid Bakir
Computation 2021, 9(12), 143; https://0-doi-org.brum.beds.ac.uk/10.3390/computation9120143 - 18 Dec 2021
Cited by 1 | Viewed by 4750
Abstract
Centrifugal compressors are widely used in many industrial fields such as automotive, aviation, aerospace. However, these turbomachines suffer instability phenomenon when the flow rate is too high or too low, called rotating stall and surge. These phenomena cause the operation failure, pressure fluctuations [...] Read more.
Centrifugal compressors are widely used in many industrial fields such as automotive, aviation, aerospace. However, these turbomachines suffer instability phenomenon when the flow rate is too high or too low, called rotating stall and surge. These phenomena cause the operation failure, pressure fluctuations and vibrations of the thorough system. Numerous mechanical solutions have been presented to minimize these instabilities and expand the operating range towards low-flow rates like active control of the flow path, variable inlet guide vane and casing treatment. Currently, our team has developed a novel compressor composed of a twin-impeller powered by autonomous systems. We notice the performance improvement and instabilities suppression of this compressor experimentally. In this paper, an active control method is introduced by controlling the speed and rotation direction of the impellers to expand the operating range. A CFD study is then conducted to analysis flow morphology and thermodynamic characteristics based on the experimental observations at three special points. Numerical results and experimental measurements of compressor maps are consistent. Full article
(This article belongs to the Special Issue Computational Heat, Mass, and Momentum Transfer—III)
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14 pages, 3151 KiB  
Article
Darcy Brinkman Equations for Hybrid Dusty Nanofluid Flow with Heat Transfer and Mass Transpiration
by K. N. Sneha, U. S. Mahabaleshwar, Rachid Bennacer and Mohammed EL. Ganaoui
Computation 2021, 9(11), 118; https://0-doi-org.brum.beds.ac.uk/10.3390/computation9110118 - 09 Nov 2021
Cited by 25 | Viewed by 2601
Abstract
In the current work, we have investigated the flow past a semi-infinite porous solid media, after presenting a similarity transformation, governing equations mapped to a system of non-linear PDE. The flow of a dusty fluid and heat transfer through a porous medium have [...] Read more.
In the current work, we have investigated the flow past a semi-infinite porous solid media, after presenting a similarity transformation, governing equations mapped to a system of non-linear PDE. The flow of a dusty fluid and heat transfer through a porous medium have few applications, viz., the polymer processing unit of a geophysical, allied area, and chemical engineering plant. Further, we had the option to get an exact analytical solution for the velocity to the equation that is non-linear. The highlight of the current work is the flow of hybrid dusty nanofluid due to Darcy porous media through linear thermal radiation with the assistance of an analytical process. The hybrid dusty nanofluid has significant features improving the heat transfer process and is extensively developed in manufacturing industrial uses. It was found that the basic similarity equations admit two phases for both stretching/shrinking surfaces. The existence of computation on velocity and temperature profile is presented graphically for different estimations of various physical parameters. Full article
(This article belongs to the Special Issue Computational Heat, Mass, and Momentum Transfer—III)
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