Microscale Heat Transfer Enhancement Utilizing EHD Effects

Kunio Hijikata, Hirokazu Kaneko, Kuniyasu Ogawa

Research output: Contribution to journalArticle

Abstract

The augmentation of direct heat removal from small-scale heating elements by an electrohy drodynamically (EHD)-induced flow was experimentally investigated. The shape of electrodes, polarity, electric field strength and electric conductivity of a working fluid were systematically changed to clarify the heat transfer mechanism. By applying electric field, the increase of the heat transfer coefficient of FC-72 (CFC) for a 25 mm2 heating element was enhanced 1.8 times at maximum compared to those with no electric field. For a 0.25 mm2 heating element, it remained at 1.2 times. However, the heat transfer coefficient for the 0.25 mm2 heating element is about 15 times greater compared with that for 25 mm2 due to the fin effect of the substrate. By using a mixture of R113 and ethanol, the heat transfer coefficient was increased about 10 times at maximum compared to those with no electric field, which was proportional to the power consumption.

Original languageEnglish
Pages (from-to)1386-1392
Number of pages7
JournalTransactions of the Japan Society of Mechanical Engineers Series B
Volume60
Issue number572
DOIs
Publication statusPublished - 1994
Externally publishedYes

Fingerprint

Electric heating elements
microbalances
heat transfer coefficients
heat transfer
Electric fields
Heat transfer coefficients
Heat transfer
heating
augmentation
electric fields
working fluids
electric field strength
fins
polarity
Electric power utilization
Ethanol
ethyl alcohol
heat
conductivity
Electrodes

Keywords

  • Electric Field
  • Electro-hydrodynamics
  • Forced Convection
  • Heat Transfer Enhancement
  • Microscale

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Microscale Heat Transfer Enhancement Utilizing EHD Effects. / Hijikata, Kunio; Kaneko, Hirokazu; Ogawa, Kuniyasu.

In: Transactions of the Japan Society of Mechanical Engineers Series B, Vol. 60, No. 572, 1994, p. 1386-1392.

Research output: Contribution to journalArticle

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