Symmetry/Asymmetry in Micro/Nanoscale Heat and Mass Transfer, Phase Change and Multiphase Flow

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Physics".

Deadline for manuscript submissions: closed (31 July 2023) | Viewed by 1370

Special Issue Editor


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Guest Editor
Institute of Engineering Thermophysics, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Interests: heat transfer; multiphase flow; electronics cooling; interface and phase change

Special Issue Information

Dear Colleagues,

Heat and mass transport at the micro/nanoscale plays essential roles in many industrial and engineering applications, such as electronics cooling, microfluidics, material processing, biochemical analysis, chemical engineering and reactors, to name a few. At the micro/nanoscale, the surface tension, phase change and other interfacial characteristics together create complex but interesting symmetric/asymmetric transport phenomena, significantly different from those at macroscale. This Special Issue provides a vehicle for researchers to exchange their ideas regarding heat and mass transfer throughout the world, focusing on not only the physical fundamentals, but also novel applications and techniques developed based on the micro/nanoscale transport process.

Topics of interest in this Special Issue include:

  1. Symmetric/asymmetric transport phenomena and fundamentals at micro/nanoscale;
  2. Interface, phase change and multiphase flow;
  3. Fluid–structure interactions and particle–fluid interactions at microscale;
  4. Symmetric/asymmetric flow instabilities;
  5. Advancing techniques and applications based on the micro/nanoscale transport process, including, but not limited to, electronics cooling, biochemical analysis, microfluidics, material process, etc.

Dr. Zhenhai Pan
Guest Editor

Manuscript Submission Information

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Keywords

  • micro/nanoscale heat and mass transfer
  • interface and phase change
  • multiphase flow
  • fluid–structure interactions
  • droplets and bubbles
  • microchannel and nanochannel

Published Papers (1 paper)

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Research

15 pages, 7911 KiB  
Article
Numerical Investigation on the Symmetric Breakup of Bubble within a Heated Microfluidic Y-Junction
by Jingbo Chen, Wen Du, Bo Kong, Zhiguo Wang, Jun Cao, Weiran Wang and Zhe Yan
Symmetry 2022, 14(8), 1661; https://doi.org/10.3390/sym14081661 - 11 Aug 2022
Cited by 1 | Viewed by 1172
Abstract
This study numerically investigated the symmetric breakup of bubble within a heated microfluidic Y-junction. The established three-dimensional model was verified with the results in the literature. Two crucial variables, Reynolds number (Re) and heat flux (q), were considered. Numerical [...] Read more.
This study numerically investigated the symmetric breakup of bubble within a heated microfluidic Y-junction. The established three-dimensional model was verified with the results in the literature. Two crucial variables, Reynolds number (Re) and heat flux (q), were considered. Numerical results demonstrated that the bubble breakup was significantly affected by phase change under the heated environment. The “breakup with tunnel” and “breakup with obstruction” modes respectively occurred at the low and high q. The breakup rate in pinch-off stage was much larger than that in squeezing stage. As Re increased, the bubble broke more rapidly, and the critical neck thickness tended to decrease. The bubble annihilated the vortices existing in the divergence region and made the fluid flow more uniform. The heat transfer was enhanced more drastically as Re was decreased or q was increased, where the maximum Nusselt number under two-phase case was 6.53 times larger than single-phase case. The present study not only helps understanding of the physical mechanisms of bubble behaviors and heat transfer within microfluidic Y-junction, but also informs design of microfluidic devices. Full article
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