Finite mass transfer effects in cavitation modelling


The prediction of cavitation is of large interest for the design of ship propellers. Cavitation influences the propeller efficiency and causes undesired phenomena such as noise, vibrations and erosion. While potential flow solvers are routinely used for propeller design, viscous CFD calculations are used when a higher fidelity is needed. Within a finite volume framework, the flow domain is subdivided into grid cells and the governing equations are solved numerically in every cell.

In this paper, effects of the finite mass transfer rate with special focus on condensation is studied in detail. First, a cavity collapse will be considered to demonstrate how the finite transfer source term must be modified to satisfy the equilibrium flow assumption. Second, a single bubble collapse is studied numerically and effects of the finite mass transfer rate will be discussed. Part of this work is a comparison of cavitating flow dynamics predicted with a structured and an unstructured mesh.

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For more information contact Tom van Terwisga.


February 3, 2017
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