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Procedure for the break-up of cavitation sheet

Aurelia Vallier ; Johan Revstedt ; Håkan Nilsson (Institutionen för tillämpad mekanik, Strömningslära)
4-th International Meeting on Cavitation and Dynamic Problems in Hydraulic Machinery and Systems, October, 26-28, 2011, Belgrade, Serbia p. 77-85. (2011)
[Konferensbidrag, övrigt]

The actual mass transfer cavitation models are limited by the grid size dependency of the Volume-Of-Fluid method. A new multi-scale approach is developed which can model the presence of bubbles smaller than the grid size. Using this method for simulations of cavitating hydrofoil will lead to a better modelling of the mixture of vapor and liquid in the transition region between the attached cavity and the shedding cloud. The principle of this approach is to complement the VOF method with a two-way coupling Lagrangian particle tracking method. The VOF-LPT coupling model is tested on simplified configurations for the breakup of an attached cavity. The results show that the model successfully displays the formation of small structures and gives a better description of the liquid/gas mixture.

Nyckelord: numerical simulation, VOF, LPT, multi-scale, cloud cavitation, OpenFOAM



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Denna post skapades 2011-11-17. Senast ändrad 2014-09-29.
CPL Pubid: 148649

 

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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Strömningslära

Ämnesområden

Energi
Hållbar utveckling
Strömningsmekanik

Chalmers infrastruktur