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A dissipative scale-similarity model

Lars Davidson (Institutionen för tillämpad mekanik, Strömningslära)
Direct and Large-Eddy Simulations 7, ERCOFTAC Series. 7th International ERCOFTAC Workshop on Direct and Large-Eddy Simulation. Univ Trieste, Trieste, ITALY. SEP 08-10, 2008 (1382-4309). Vol. 13 (2010), p. 261-266.
[Konferensbidrag, refereegranskat]

When Bardina in 1980 developed the scale-similarity model it was found that the gradient of the scale-similarity stress tensor was not sufficiently dissipative. They had to add a Smagorinsky SGS model. The present paper presents a scale-similarity model which is dissipative; this is achieved by using the fact that the viscous diffusion term is always dissipative. We include the gradient of the scale-similarity stress tensor only when its sign agrees with that of the viscous diffusion term, otherwise it is set to zero.



Denna post skapades 2010-11-29. Senast ändrad 2016-06-14.
CPL Pubid: 129782

 

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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Strömningslära

Ämnesområden

Strömningsmekanik

Chalmers infrastruktur