高熱流束沸騰の固液接触構造のモデル化(熱工学,内燃機関,動力など)  [in Japanese] A Model for Liquid-Solid Contact in High Heat-Flux Boiling  [in Japanese]

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Abstract

The model for high heat-flux boiling, introduced in this paper, is based on a similarity between dropwise condensation and high heat-flux boiling, observed in simultaneous visualization experiment of liquid-solid contact and bubble structure. The bubble coalescing process in boiling on a horizontal flat surface is formulated into integral equations, assuming random positioning of dry patches and bubbles. Taking the nucleation site density and the activeness of nucleation sites, measured by image processing technique, into account, the equations are numerically solved to yield a dry patch diameter distribution as a result of cyclic process of bubble nucleation, transient bubble growth and bubble departure. The three-phase contact-line density, calculated from the dry patch distribution, has a maximum point, similar to that of experimental data. This model has a potential to explain the CHF as the extreme of smooth boiling curve, regarding wall superheat as the driving force of the CHF phenomenon.

Journal

Transactions of the Japan Society of Mechanical Engineers. B   [List of Volumes]

Transactions of the Japan Society of Mechanical Engineers. B 69(683), 1659-1665, 2003-07-25  [Table of Contents]

The Japan Society of Mechanical Engineers

References:  21

Cited by:  2

Codes

  • NII Article ID (NAID) :
    110002388222
  • NII NACSIS-CAT ID (NCID) :
    AN00187441
  • Text Lang :
    JPN
  • Article Type :
    Journal Article
  • ISSN :
    03875016
  • NDL Article ID :
    6653429
  • NDL Source Classification :
    ZN11(科学技術--機械工学・工業)
  • NDL Call No. :
    Z16-109
  • Databases :
    CJP  CJPref  NDL  NII-ELS