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Advances in Thermal and Fluid Science
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Advances in Thermal and Fluid Science

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "J: Thermal Management".

Deadline for manuscript submissions: closed (30 November 2022) | Viewed by 4236

Special Issue Editor

Prof. Dr. Amir Shooshtari

E-Mail Website
Guest Editor
Advanced Heat Exchangers and Process Intensification Laboratory, Department of Mechanical Engineering, University of Maryland, College Park, MD 20742, USA
Interests: thermal management; additive manufacturing; thermal energy conversion; process intensification; multidisciplinary modeling, optimization and integration; electronics cooling
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Many aspects in our day-to-day life are directly related to heat transfer and fluid flow phenomena.  Creative and innovative thinking along with daily progress in both hardware and software has greatly helped in emergence of new approaches, techniques, and methods in this field.  The Special Issue in Advances in Thermal and Fluid Science provides an open-access forum specifically devoted to latest advances in all areas of heat transfer and fluid science. This Special Issue aims to provide opportunities to investigators, engineers and the public worldwide to exchange novel ideas and disseminate knowledge and impactful discoveries in this field. The scope of this Special Issue includes empirical, theoretical, and numerical studies on all emerging areas including (not limited to) multidisciplinary heat and mass transfer,  micro- and nanoscale science, microfluidic, multiscale and multiphysics modeling and simulation, advanced thermal management techniques, manufacturing processes, materials science, and engineering.

We invite scientists, researchers, and research scholars to contribute to this Special Issue with innovative research articles. In addition to research papers, we welcome state-of-the-art and original research reviews on relevant topics.

Dr. Amir Shooshtari
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. 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
  • fluid flow
  • microfluidics
  • thermal management
  • micro-/nano-fluid dynamics
  • computational fluid dynamics
  • nanofluid
  • heat exchangers
  • electronics cooling

Published Papers (3 papers)

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Research

20 pages, 4148 KiB  
Article
Experimental Characterization of an Additively Manufactured Inconel 718 Heat Exchanger for High-Temperature Applications
by Fabio Battaglia, Martinus Arie, Xiang Zhang, Michael Ohadi and Amir Shooshtari
Energies 2023, 16(10), 4156; https://doi.org/10.3390/en16104156 - 17 May 2023
Cited by 2 | Viewed by 1230
Abstract
This work presents the experimental results of a novel, air-to-air, additively manufactured manifold-microchannel heat exchanger with straight fins on both sides. The heat exchanger was made of Inconel 718 using a direct metal laser sintering technique. The overall core size of the heat [...] Read more.
This work presents the experimental results of a novel, air-to-air, additively manufactured manifold-microchannel heat exchanger with straight fins on both sides. The heat exchanger was made of Inconel 718 using a direct metal laser sintering technique. The overall core size of the heat exchanger was 94 mm × 87.6 mm × 94.4 mm, with a fin thickness of 0.220 mm on both the hot and cold sides. The heat exchanger was tested with pressurized nitrogen gas at 300 °C and 340 kPa for the hot side, while air at an ambient condition was used for the cold side. An overall heat transfer of 276 W/m2K was obtained for Reynolds number values of 132 and 79 for the cold and hot sides, respectively. A gravimetric heat transfer density (Q/m∆T) of 4.7–6.7 W/kgK and a volumetric heat transfer density (Q/V∆T) of 6.9–9.8 kW/m3K were recorded for this heat exchanger with a coefficient of performance value that varied from 42 to 52 over the operating conditions studied here. The experimental pressure drop results were within 10% of the numerical values, while the corresponding heat transfer results were within 17% of the numerical results, mainly due to imperfections in the fabrication process. Despite this penalty, the performance of the tested heat exchanger was superior to the conventional plate-fin heat exchangers: more than 60% of improvements in both gravimetric and volumetric heat transfer densities were recorded for the entire range of experimental data. Full article
(This article belongs to the Special Issue Advances in Thermal and Fluid Science)
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13 pages, 6329 KiB  
Article
Study of the Aerodynamic Performance of Pantograph Bowhead with Serrated Lower Surface in the Thermal Management Systems of the High-Speed Train Electrical Devices
by Bo Cai, Zhongkai Wu, Jiyou Fei, Chang Liu and Zhongzhen Guan
Energies 2023, 16(5), 2234; https://doi.org/10.3390/en16052234 - 25 Feb 2023
Cited by 1 | Viewed by 1077
Abstract
The thermal management problems of traction drive systems for high-speed trains are of great importance for the operation reliability of high-speed trains. The thermal performance of transformer and traction rectifier are mainly affected by the aerodynamic performance of pantograph. Nine bowheads with different [...] Read more.
The thermal management problems of traction drive systems for high-speed trains are of great importance for the operation reliability of high-speed trains. The thermal performance of transformer and traction rectifier are mainly affected by the aerodynamic performance of pantograph. Nine bowheads with different sawtooth structures on the lower surface are proposed and a CFD numerical model is built with Transition SST turbulence model. The influence of the number and height of sawteeth on the aerodynamic characteristics of the bowhead flow field are investigated. The results show that compared with the rectangular bowhead, the aerodynamic drag of the 5w3h-shaped bowhead is reduced by 8.6%, 8.7%, and 9.9% at train speeds of 250 km/h, 300 km/h, and 350 km/h, respectively. The promotion of aerodynamic performance of pantograph is beneficial to improve the thermal characteristics of traction drive systems for high-speed trains. Full article
(This article belongs to the Special Issue Advances in Thermal and Fluid Science)
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17 pages, 5275 KiB  
Article
Development of a Background-Oriented Schlieren (BOS) System for Thermal Characterization of Flow Induced by Plasma Actuators
by Miguel Moreira, Frederico Rodrigues, Sílvio Cândido, Guilherme Santos and José Páscoa
Energies 2023, 16(1), 540; https://doi.org/10.3390/en16010540 - 3 Jan 2023
Cited by 5 | Viewed by 1572
Abstract
Cold climate regions have great potential for wind power generation. The available wind energy in these regions is about 10% higher than in other regions due to higher wind speeds and increased air density. However, these regions usually have favorable icing conditions that [...] Read more.
Cold climate regions have great potential for wind power generation. The available wind energy in these regions is about 10% higher than in other regions due to higher wind speeds and increased air density. However, these regions usually have favorable icing conditions that lead to ice accumulation on the wind turbine blades, which in turn increases the weight of the blades and disrupts local airflow, resulting in a reduction in wind turbine performance. Considering this problem, plasma actuators have been proposed as devices for simultaneous flow control and deicing. These devices transfer momentum to the local airflow, improving the aerodynamic performances of the turbine blades while producing significant thermal effects that can be used to prevent ice formation. Considering the potential application of plasma actuators for simultaneous flow control and deicing, it is very important to investigate the thermal effects induced by these devices. However, due to the significant electromagnetic interference generated by the operation of these devices, there is a lack of experimental techniques that can be used to analyze them. In the current work, a background-oriented Schlieren system was developed and is presented as a new experimental technique for the thermal characterization of the plasma-induced flow. For the first time, the induced flow temperatures are characterized for plasma actuators with different dielectric materials and different dielectric thicknesses. The results demonstrate that, due to the plasma discharge, the temperature of the plasma-induced flow increases with the increase of the applied voltage and may achieve temperatures five times higher than the room temperature, which proves the potential of plasma actuators for deicing applications. The results are presented and discussed with respect to the potential application of plasma actuators for simultaneous flow control and deicing of wind turbine blades. Full article
(This article belongs to the Special Issue Advances in Thermal and Fluid Science)
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