On the Water Cooling of Hot Surfaces: (Analysis of Fog Cooling in the Region Equivalent to Film Boiling)

Takehiro Ito, Yasuyuki Takata, Zhen hua Liu

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A theoretical study has been conducted on air-atomized fog cooling in the region equivalent to film boiling with low mass velocity of water. In the analysis, total heat flux is expressed by the sum of three components, i.e. radiation, forced convection by air flow and evaporation of liquid droplets. The air flow is approximated by an axisymmetric laminar stagnation flow. It is assumed that spherical droplets float on the vapor film formed along the hot surface and move in the radial direction with a droplet is estimated by conduction through the vapor film. It has been derived that heat flux by evaporation increases linearly with the mass velocity of water and inversely with the square root of diameter and impinging velocity of the droplet. The prediction performance of the proposed analysis if fairly good.

Original languageEnglish
Pages (from-to)805-813
Number of pages9
JournalTransactions of the Japan Society of Mechanical Engineers Series B
Volume55
Issue number511
DOIs
Publication statusPublished - Jan 1 1989

Fingerprint

film boiling
hot surfaces
fog
liquid cooling
Surface analysis
Fog
Cooling water
Boiling liquids
air flow
Cooling
cooling
heat flux
evaporation
stagnation flow
vapors
Heat flux
performance prediction
Evaporation
floats
Air

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

On the Water Cooling of Hot Surfaces : (Analysis of Fog Cooling in the Region Equivalent to Film Boiling). / Ito, Takehiro; Takata, Yasuyuki; Liu, Zhen hua.

In: Transactions of the Japan Society of Mechanical Engineers Series B, Vol. 55, No. 511, 01.01.1989, p. 805-813.

Research output: Contribution to journalArticle

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