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High-Performance Numerical Simulation in Heat Transfer
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High-Performance Numerical Simulation in Heat Transfer

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "J1: Heat and Mass Transfer".

Deadline for manuscript submissions: 27 January 2025 | Viewed by 4110

Special Issue Editors

Dr. Marzena Iwaniszyn

E-Mail Website
Guest Editor
Institute of Chemical Engineering, Polish Academy of Sciences, Bałtycka 5, 44-100 Gliwice, Poland
Interests: catalytic combustion; CFD modeling; fluid flow; transport phenomena; structured reactor; reaction engineering
Special Issues, Collections and Topics in MDPI journals
Dr. Mateusz Korpyś

E-Mail Website
Guest Editor
Institute of Chemical Engineering, Polish Academy of Sciences, Bałtycka 5, 44-100 Gliwice, Poland
Interests: catalytic combustion; CFD modeling; fluid flow; transport phenomena; structured reactor; reaction engineering
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Thermal management plays a crucial role in various energy systems, including air conditioning, heating and cooling, chemical processing, energy storage, and electricity production. Heat transfer determines energy saving, taking into account energy generation, utilization, conversion, storage, and transmission. Additionally, developments in this field promise to reduce greenhouse gas emissions, especially of carbon dioxide and methane. Heat transfer is also essential in many other physical and chemical phenomena such as fluid flow, mass transfer, phase change, chemical reaction, combustion, radiation, ultrasound propagation, etc. Computational simulations are still widely applied to the optimization of these issues and to improving overall system performance and efficiency.

This Special Issue aims to collect articles focused on the numerical modeling of heat transfer in industrial and natural systems alike. Both review and research papers are welcome.

Dr. Marzena Iwaniszyn
Dr. Mateusz Korpyś
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

  • CFD modeling and simulation
  • heat transfer
  • fluid flow
  • thermal management
  • transport phenomena
  • conversion
  • environmental and industrial processes
  • energy systems
  • theoretical and experimental analysis

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Published Papers (4 papers)

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Research

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15 pages, 2756 KiB  
Article
Comparative and Sensibility Analysis of Cooling Systems
by Érick-G. Espinosa-Martínez, Sergio Quezada-García, M. Azucena Escobedo-Izquierdo and Ricardo I. Cázares-Ramírez
Energies 2024, 17(17), 4452; https://doi.org/10.3390/en17174452 - 5 Sep 2024
Viewed by 494
Abstract
As the global average temperature has increased due to climate change, the use of air conditioning equipment for cooling homes has become more popular. Inverter equipment is advertised as a better energy option than systems with an on/off control; however, there is a [...] Read more.
As the global average temperature has increased due to climate change, the use of air conditioning equipment for cooling homes has become more popular. Inverter equipment is advertised as a better energy option than systems with an on/off control; however, there is a lack of sufficient studies to prove this. This work aims to analyze and compare the electricity consumption associated with cooling equipment with an on/off control and inverter equipment. A heat transfer model coupled with energy balance for a room is developed and implemented in Python 3.12. The indoor temperature is controlled by simulating an on/off control and a PID control for the inverter system. Subsequently, the electricity consumption of the two systems is compared, and a sensitivity analysis is performed to determine which variables have the greatest impact on electricity consumption. The results show that the inverter equipment has lower electricity consumption compared to the equipment with the on/off control. However, the sensitivity analysis shows that the indoor temperature set point plays a more relevant role since a 15% variation in its value impacts electricity consumption by up to 77%. Full article
(This article belongs to the Special Issue High-Performance Numerical Simulation in Heat Transfer)
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11 pages, 2734 KiB  
Article
Innovative Fixed-Bed Reactor Integrated with Heat Transfer System for Lean Methane Mixture Removal
by Marzena Iwaniszyn, Mateusz Korpyś, Adam Rotkegel, Zenon Ziobrowski, Andrzej Kołodziej, Katarzyna Sindera, Mikołaj Suwak and Anna Gancarczyk
Energies 2024, 17(17), 4408; https://doi.org/10.3390/en17174408 - 3 Sep 2024
Viewed by 474
Abstract
A new type of compact, portable fixed-bed reactor integrated with a heat transfer system was developed for the removal of volatile and flammable air pollutants such as lean methane and volatile organic compounds (VOCs). The reactor may operate in catalytic or thermal combustion [...] Read more.
A new type of compact, portable fixed-bed reactor integrated with a heat transfer system was developed for the removal of volatile and flammable air pollutants such as lean methane and volatile organic compounds (VOCs). The reactor may operate in catalytic or thermal combustion conditions with the purpose of achieving autothermal processes with the possibility of energy recovery. An excess heat recovery point was designed behind the reactor bed at the place where the gas temperature is the highest to enable its usage. The mathematical model is presented together with a number of simulation calculations performed for the assessment of the developed reactor. The case study in this paper was for catalytic methane oxidation at a temperature of 400 °C, a methane concentration between 0.1% and 2% by weight, a gas flow rate of 1 m3/s STP, and a heat exchange surface for the assumed plate exchanger from 10 to 200 m2. The calculations show that the thickness of the insulation is of little importance for the operation of the equipment, and a sufficient thickness was about 20–50 mm. The optimal area for the considered case is 80–100 m2. It was found that recovery of thermal energy is possible only for higher methane concentrations, above 0.3% by weight. Using an appropriate surface for the exchanger, it is possible to recover even 50% of the combustion enthalpy at a methane concentration of 0.45% by weight. For an exchanger area below 50 m2, the recoverable energy drops rapidly. It was found that the exchanger area is the most important equipment parameter under consideration. Full article
(This article belongs to the Special Issue High-Performance Numerical Simulation in Heat Transfer)
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28 pages, 13282 KiB  
Article
Large-Eddy vs. Reynolds-Averaged Navier–Stokes Simulations of Flow and Heat Transfer in a U-Duct with Unsteady Flow Separation
by Kenny S. Hu and Tom I-P. Shih
Energies 2024, 17(10), 2414; https://doi.org/10.3390/en17102414 - 17 May 2024
Cited by 2 | Viewed by 830
Abstract
Large-eddy simulation (LES) and Reynolds-Averaged Navier–Stokes (RANS) equations were used to study incompressible flow and heat transfer in a U-duct with a high-aspect-ratio trapezoidal cross section. For the LES, the WALE subgrid-scale model was employed, and its inflow boundary condition was provided by [...] Read more.
Large-eddy simulation (LES) and Reynolds-Averaged Navier–Stokes (RANS) equations were used to study incompressible flow and heat transfer in a U-duct with a high-aspect-ratio trapezoidal cross section. For the LES, the WALE subgrid-scale model was employed, and its inflow boundary condition was provided by a concurrent LES of incompressible fully-developed flow in a straight duct with the same cross section and flow conditions as the U-duct. LES results are presented for turbulent kinetic energy, Reynolds stresses, pressure–strain rate, turbulent diffusion, turbulent transport, and velocity–temperature correlations, with a focus on how they are affected by the U-turn region of the U-duct. The LES results were also used to assess three commonly used RANS models: the realizable k-ε with the two-layer model in the near-wall region, the two-equation shear-stress transport model, and the seven-equation stress-omega Reynolds stress model. Results obtained show steady and unsteady RANS to incorrectly predict the effects of unsteady flow separation. The results obtained also identified the terms in the RANS models that need to be modified and suggested how turbulent diffusion should be modeled when there is unsteady flow separation. Full article
(This article belongs to the Special Issue High-Performance Numerical Simulation in Heat Transfer)
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Review

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30 pages, 5431 KiB  
Review
Achievements and Prospects of Molecular Dynamics Simulations in Thermofluid Sciences
by Yunmin Ran and Volfango Bertola
Energies 2024, 17(4), 888; https://doi.org/10.3390/en17040888 - 14 Feb 2024
Cited by 2 | Viewed by 1751
Abstract
In the last decades, molecular dynamics (MD) simulations established as an important tool for solving fluid flow and heat transfer problems at the nanoscale, with a significant perspective impact on a wide range of industrial and scientific applications. As usual, this happened with [...] Read more.
In the last decades, molecular dynamics (MD) simulations established as an important tool for solving fluid flow and heat transfer problems at the nanoscale, with a significant perspective impact on a wide range of industrial and scientific applications. As usual, this happened with several scholarly papers on this topic being published in the same period. The present article provides a thorough review of molecular dynamics (MD) simulations in the domain of fluid flow and heat transfer. In the first section, a survey of the physical modelling of heat transfer phenomena by MD simulations is presented, focusing on bubble and droplet nucleation and interfacial thermal behaviours. Subsequently, MD simulations of fluid flow and heat transfer in nanochannels are discussed, including adiabatic flow, convective heat transfer, and two-phase flow. Particular emphasis was placed on critical phenomena such as evaporation and condensation, to assess the effects of confinement within nanochannels. Finally, some of the current and emerging challenges in MD simulations and suggests future research directions are discussed. Full article
(This article belongs to the Special Issue High-Performance Numerical Simulation in Heat Transfer)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Design and optimization of the fireplace inserts, with a closed combustion chamber, by CFD modelling
Authors: A.Klimanek 1, M.Rojczyk 1, M. Lemanowicz 2, M.Stec 2, R.Kubica 2
Affiliation: 1. Department of Thermal Technology, Silesian University of Technology 2. Department of Chemical Engineering and Process Design, Silesian University of Technology
Abstract: The paper provides the results of research on design and optimization of the furnace geometry by CFD modelling, with the use a simplified model of combustion process. At first, the CFD model was validated based on experimental measurements performed on a full scale fireplace insert. Such approach resulted in a rapid prototyping tool used to redesign the number of different types of fireplace inserts. The simulations were performed for four selected construction variants, including straight, sided and vertical inserts as well as an insert with a water jacket. The newly developed design solutions were subjected to product testing according to relevant standards which proved that all devices fulfill strict ECODESIGN requirements.

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