Swing-like pool boiling on nano-textured surfaces for microgravity applications related to cooling of high-power microelectronics

Sumit Sinha-Ray, Wenshuo Zhang, Barak Stoltz, Rakesh P. Sahu, Suman Sinha-Ray, Alexander Yarin

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Here, we demonstrate that heat removed in pool boiling from a heater mimicking high-power microelectronics could be used to facilitate a swing-like motion of the heater before being finally dissipated. This swing-like motion could be beneficial for shedding a large vapor bubble that encapsulates high-power heaters in microgravity where buoyancy force is unavailable for vapor bubble removal. The swing-like motion is propelled by vapor bubble recoil, the force which exists irrespective of gravity and buoyancy. We also demonstrate that this force could be significantly enhanced by depositing on the heater surface supersonically blown polymer nanofibers with cross-sectional diameters below 100 nm. These nanofibers provide additional nucleation sites, resulting in much more frequent bubble nucleation and departure, and thus a higher overall vapor recoil force propelling the heater motion. Such nanofibers strongly adhere to the heater surface and withstand prolonged harsh pool boiling. The measured velocity of the model swing-like heater in Novec 7300 fluid is about 1 cm/s.

Original languageEnglish
Article number9
Journalnpj Microgravity
Volume3
Issue number1
DOIs
Publication statusPublished - 2017 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Space and Planetary Science
  • Medicine (miscellaneous)
  • Agricultural and Biological Sciences (miscellaneous)
  • Biochemistry, Genetics and Molecular Biology (miscellaneous)
  • Materials Science (miscellaneous)

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