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For high temperature liquids where the bubble growth is heat diffusion controlled, the performance of a thermal non-equilibrium bubble dynamics model is analyzed. The model is based on thermal energy balances of a single bubble within a fixed mass of fluid (elementary cell). A constant mass of undissolved air is considered in the bubble. A spatially homogeneous temperature for both the vapor–air mixture within the bubble interior and the surrounding liquid is assumed. The model accuracy is compared to the wellestablished Rayleigh–Plesset equation in combination with the heat transfer model by Plesset and Zwick. The results of both models agree very well. Due to the embedding of a bubble in a finite amount of surrounding liquid and its harmless numerical properties, the model is assumed to be very suitable for the straightforward implementation in 3D-CFD codes as a cavitation model which will be carried out in future work.

wit transactions on engineering sciences

A study on thermally controlled bubble growth in a superheated liquid with a thermal non-equilibrium cavitation model based on energy balances on a fixed fluid mass