Vapour bubble growth and recondensation in subcooled boiling flow

Abstract A physical model for the dynamics of vapour bubbles is presented, which is applicable to bubbles generated at the heated wall of channels with boiling flow. By comparing the theory with experimental data from various sources, it is shown that simultaneous agreement can be obtained with regard to bubble size, bubble lifetime and recondensation rate within the error band of experimental data by the proper choice of one fitting parameter only. The proposed model is then compared with some previously published approaches. Correlations for the dependence of bubble lifetime and bubble size on local fluid conditions are derived which are suitable for the prediction of vapour contents in heated channels with subcooled inlet flow.

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