K-1717 高熱流束沸騰における固液接触構造(S22-1 気液相変化に関する素過程と数値解析手法(1))(S22 気液相変化に関する素過程と数値解析手法)

概要

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Nishio et al. presented the concept of contact-line length density (CLLD) and showed that the critical heat flux (CHF) corresponds to the situation where CLLD reaches maximum. This report presents a model describing such situation. In general, a dry area generated on a boiling surface grows and then reaches its maximum diameter (D^*). In the model, it is assumed that CLLD reaches maximum if dry areas of diameter D^* are packed closely on the boiling surface. The value of D^* is determined by experimental data of the nucleation site density n^*. Finally, the value of CLLD at CHF is calculated and it is shown that the calculated value of CLLD is in good agreement with experimental data of CLLD at CHF.
2001-08-22