Modelling of single bubble-dynamics and thermal effects

9th International Symposium on Cavitation

Papoulias, D.^1 ; Gavaises, M.^2

CD-adapco, 200 Shepherds Bush Road, London

W6 7NL, United Kingdom^1

Department of Mechanical Engineering and Aeronautics, City University London, Northampton Square, London

EC1V 0HB, United Kingdom^2

关键词: Cavitation bubble;    Compressibility correction;    Equation of state;    Rayleigh-Plesset model;    Reynolds-averaged navier-stokes simulations;    Single-bubble sonoluminescence;    Solution effects;    Thermal behaviours;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012098/pdf
DOI  :  10.1088/1742-6596/656/1/012098

来源: IOP

【 摘 要 】

This paper evaluates the solution effects of different Rayleigh-Plesset models (R-P) for simulating the growth/collapse dynamics and thermal behaviour of homogeneous gas bubbles. The flow inputs used for the discrete cavitation bubble calculations are obtained from Reynolds-averaged Navier-Stokes simulations (RANS), performed in high-pressure nozzle holes. Parametric 1-D results are presented for the classical thermal R-P equation [1] as well as for refined models which incorporated compressibility corrections and thermal effects [2, 3]. The thermal bubble model is coupled with the energy equation, which provides the temperature of the bubble as a function of conduction/convection and radiation heat-transfer mechanisms. For approximating gas pressure variations a high-order virial equation of state (EOS) was used, based on Helmholtz free energy principle [4]. The coded thermal R-P model was validated against experimental measurements [5] and model predictions [6] reported in single-bubble sonoluminescence (SBSL).