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Effect of Turbulence Closure on the Simulation of the Cavitating Flow on the Delft Twist11 Foil

Abolfazl Asnaghi (Institutionen för sjöfart och marin teknik) ; Andreas Feymark (Institutionen för sjöfart och marin teknik) ; Rickard Bensow (Institutionen för sjöfart och marin teknik)
Numerical Towing Tank Symposium Vol. 2013 (2013),
[Konferensbidrag, övrigt]

In this paper, we continue to test and evaluate different approaches of turbulence closures for the simulation of unsteady sheet cavitation. At the workshop on cavitating flows in connection with the 2nd International Symposium on Marine Propulsion, Bensow (2011) showed results for RANS, DES, and implicit LES, and some peculiarities regarding the behavior of the RANS and DES models were detected, especially in combination with the ad hoc correction by Reboud (3rd International Symposium on Cavitation, 1998) which is frequently used in connection with RANS modeling of cavitating flows. Following up on this, testing of another set of turbulence closures is in progress, as the Spalart-Almaras RANS model used for the RANS simulation in (Bensow, 2011) has also in other papers, e.g. Eskilsson and Bensow (2012), not giving as good results as has been published using other models. Here we present intermediate results using the k-Omega SST RANS model with and without Reboud correction.

Nyckelord: Cavitation, turbulence closure, unsteady flow



Denna post skapades 2014-01-12. Senast ändrad 2014-09-02.
CPL Pubid: 192157

 

Institutioner (Chalmers)

Institutionen för sjöfart och marin teknik

Ämnesområden

Strömningsmekanik

Chalmers infrastruktur