E108 BUBBLING FEATURES FROM A SINGLE ARTIFICIAL CAVITY(Pool boiling)

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概要

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• One of the critical factors in boiling phenomena is the bubbling behavior of nucleation sites. Not many past researches deal with dynamical, spatio-temporal behavior of cavities, and only few experimental reports can be seen due to the difficulty of specifying shapes and locations of cavities. In this paper, a single artificial cavity was manufactured on a copper thin plate and was heated by laser in a water pool. Conical, cylindrical and reentrant type cavities were tested. Conical cavities showed highly intermittent bubbling with a large temperature fluctuation and required rather high superheat. Phase map was reconstructed from temperature time series and nonlinear analysis indicated a possibility of low dimensional chaos. Cylindrical cavities showed continuous and stable bubbling from rather low superheat. Return map was constructed from succeeding bubbling interval, showing highly nonlinear bubbling behavior. Reentrant cavities showed similar behavior to those of cylindrical type, but little more complicated.

• 一般社団法人日本機械学会の論文
• 2000-10-01

著者

• Shoji Masahiro

  Dept. Of Mech. Eng. The Univ. Of Tokyo

• TAKAGI Yuto

  Dept. of Mech. Eng., The Univ. of Tokyo

• Takagi Yuto

  Dept. Of Mech. Eng. The Univ. Of Tokyo

関連論文

• Miminum Heat Flux of Saturated Pool Boiling on a Horizontal Heated Surface : An Experiment for R 113 at Reduced and Elevated Pressures : Series B : Fluid Engineering, Heat Transfer, Combustion, Power, Thermophysical, Properties
• I103 CHAOTIC IDENTIFICATION OF GAS - LIQUID TWO- PHASE FLOW PATTERN IN A VERTICAL PIPE(Multiphase flow dynamics/non-linearity)
• E108 BUBBLING FEATURES FROM A SINGLE ARTIFICIAL CAVITY(Pool boiling)

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