Heat Transfer Enhancement Mechanisms and Techniques

A special issue of Fluids (ISSN 2311-5521). This special issue belongs to the section "Heat and Mass Transfer".

Deadline for manuscript submissions: closed (1 December 2023) | Viewed by 1261

Special Issue Editors


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Guest Editor
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Interests: computational heat transfer; thermal control; machine learning
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Guest Editor
State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Interests: spray cooling; gas–liquid flow; heat transfer; droplet
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue is devoted to the mechanism and technique of heat transfer enhancement. These are central to industries such as the thermal power industry, nuclear power, food manufacturing, chemical industry, electronics and petroleum in the context of the global energy shortage. The main research objective of heat transfer enhancement technology is to improve heat transfer capacity and efficiency by enhancing heat conduction, convection or radiation heat transfer processes, among which the most widely studied is the enhancement of convection heat transfer. Convection heat transfer enhancement methods can be divided into active enhancement methods and passive enhancement methods. The former is mainly achieved by adding inserts, changing the geometry of pipe walls or heat transfer elements, rough wall surfaces, etc. Conversely, the latter requires external inputs to operate, such as mechanical agitation, surface vibration, fluid vibration, jet suction, etc. In addition, there are composite reinforcement techniques in which two or more of the above methods are applied simultaneously. Heat transfer enhancement is a complex problem that involves the multidisciplinary coupling of fluid, heat transfer and materials. In this Special Issue, we invite submissions that explore cutting-edge research and recent advances in the mechanism and techniques of heat transfer enhancement.

Prof. Dr. Wei-Tao Wu
Prof. Dr. Zhifu Zhou
Guest Editors

Manuscript Submission Information

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Keywords

  • heat transfer
  • fluid flow
  • design and optimization
  • thermal control

Published Papers (1 paper)

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Research

18 pages, 12716 KiB  
Article
Effects of Nozzle Pitch Adaptation in Micro-Scale Liquid Jet Impingement
by Georg Elsinger, Herman Oprins, Vladimir Cherman, Geert Van der Plas, Eric Beyne and Ingrid De Wolf
Fluids 2024, 9(3), 69; https://doi.org/10.3390/fluids9030069 - 07 Mar 2024
Viewed by 924
Abstract
With ever increasing integration density of electronic components, the demand for cooling solutions capable of removing the heat generated by such systems grows along with it. It has been shown that a viable answer to this demand is the use of direct liquid [...] Read more.
With ever increasing integration density of electronic components, the demand for cooling solutions capable of removing the heat generated by such systems grows along with it. It has been shown that a viable answer to this demand is the use of direct liquid jet impingement. While this method can generally be scaled to the cooling of large areas, this is restricted by the necessity of coolant flow rate scaling. In this study, the benefits and restrictions of using increased nozzle pitch to remedy the increasing demand for overall flow rate are investigated. To this end, a model is validated against experimental findings and then used for computational fluid dynamics simulations, exploring effects of the pitch change for micro-scale nozzle diameters and nozzle-to-target spacings. It is found that while this method is efficient in adjusting the tradeoff between total coolant flow rate and pressure drop up to a certain pint, the occurrence of a hydraulic jump in the cavity causes a deterioration of its effect for large nozzle pitches. Full article
(This article belongs to the Special Issue Heat Transfer Enhancement Mechanisms and Techniques)
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