Abstract
In this work, a multi-scale modeling of cavitation-erosion phenomena performed in an Eulerian–Lagrangian two-way coupling approach is developed. Cavitation-erosion phenomena are widely seen in multi-phase flow with different sizes of time and length scale. Based on the multi-scale concepts, the information obtained at the level of small length scales can be used to provide closure information at the level of larger length scales. First of all in our implementation, a two-phase mixture flow model and a temperature dependent homogeneous equilibrium saturation models are used simulate phase transitions and steamwater interfaces. Subsequently, solid particle trajectories caused by the translation and rotation and particle-wall collisions are evaluated by a Lagrangian approach based on the continuum flow information. Then, an Eulerian–Lagrangian two way coupling are used to evaluate the interactions between the gas-liquid mixture and dispersive solid particles such as the drag, virtual mass and lift forces.
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