Abstract
Homogeneous mixture models are widely used to predict the hydrodynamic cavitation. In this study, the constant-transfer coefficient model is implemented into a homogeneous cavitation model to predict the heat and mass diffusion. Modifications are made to the average bubble temperature and the Peclet number for thermal diffusivity in the constant-transfer coefficient model. The evolutions of a spherical bubble triggered by negative pressure pulse are simulated to evaluate the prediction of heat and mass diffusion by the homogeneous model. The evolutions of three bubbles inside a rectangular tube are simulated, which show good accuracy of the homogeneous model for multibubbles in stationary liquid.
Highlights
Cavitation is usually caused by pressure decrease, leading to the growth of bubbles and followed by their rapid collapse
The constant-transfer coefficient model [19] is a theoretical model for spherical bubble dynamics that considers the effects of heat and mass transfer
The constant-transfercoefficient coefficientmodel modelisisimplemented implementedinto intoa a homogeneous cavitation model
Summary
Cavitation is usually caused by pressure decrease, leading to the growth of bubbles and followed by their rapid collapse. Preston et al [19] proposed a theoretical model named constant-transfer coefficient model, which can capture the effect of heat and mass transfer efficiently for a spherical bubble In this model, two transport equations are used to, respectively, record the pressure (pGV ) and the mass of vapor (mV ) inside the bubble, and two constant-transfer coefficients are used to estimate the heat and mass flux at the bubble wall. Two transport equations are used to, respectively, record the pressure (pGV ) and the mass of vapor (mV ) inside the bubble, and two constant-transfer coefficients are used to estimate the heat and mass flux at the bubble wall In this study, this model is implemented into the homogeneous mixture. Comparisons with the predictions by the VOF method and the full computation (uses six equations to predict the heat and mass transfer) are made
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