Simulating compressibility in cavitating flows with an incompressible mass transfer flow solver

Simulating compressibility in cavitating flows with an incompressible mass transfer flow solver

Schenke, S. (TU Delft Ship Hydromechanics and Structures)
van Terwisga, T.J.C. (TU Delft Ship Hydromechanics and Structures; Maritime Research Institute Netherlands (MARIN))

Sánchez-Caja, Antonio (editor)

2017

The effect of finite mass transfer rate in combination with temporal resolution on the dynamics of caviting flows is subject of this study. It will be shown that global flow quantities exhibit convergent behaviour with respect to mass transfer rate and time step size in incompressible pressurebased simulation of cavitating flows. It is concluded that large mass transfer rates are required in combination with sufficiently small time steps to focus the local phase transition process to time intervals which are small with respect to both the time scale of the flow (Sezal 2009) and the characteristic cavity collapse time. Koukouvinis & Gavaises (2015) as well as Bhatt et al (2015) came to similar conclusions. The effect of finite mass transfer is demonstrated by numerical studies of an isolated bubble collapse and a cavitating wedge flow. It is further shown how a conventional finite mass transfer approach must be modified to achieve homogeneous equilibrium states as given by an arbitrary barotropic equation of state in the presence of advective density change.

Equilibrium flow
equilibrium state
mass transfer
cavitation dynamics

http://resolver.tudelft.nl/uuid:39bc5ac2-ee9b-4c4a-bfc4-97245aa3540c

VTT Technical Research Centre of Finland

978-951-38-8606-6

Proceedings of the 5th International Symposium on Marine Propulsion (SMP 2017)

SMP '17: 5th International Symposium on Marine Propulsors, 2017-06-12 → 2017-06-15, Espoo, Finland

Institutional Repository

conference paper

© 2017 S. Schenke, T.J.C. van Terwisga