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Showing results 1 to 7 of 7 Search took 0.00 seconds. Search: Posts Made By: cfdmarkus

Forum: OpenFOAM Running, Solving & CFD July 27, 2009, 12:31

Replies: 18 strange behaviour of the one-equation SGS model Views: 3,061 Posted By cfdmarkus yes, it seems to me that the failure is due to... yes, it seems to me that the failure is due to wall functions. In the figure, the shear layer is very stable and does not break down to turbulence quick enough. I suppose that the the contribution...

Forum: OpenFOAM Running, Solving & CFD July 27, 2009, 09:46

Replies: 18 strange behaviour of the one-equation SGS model Views: 3,061 Posted By cfdmarkus ok here is the figure ok here is the figure

Forum: OpenFOAM Running, Solving & CFD July 27, 2009, 09:42

Replies: 18 strange behaviour of the one-equation SGS model Views: 3,061 Posted By cfdmarkus I am aware that people adapt the Ck and also Cdes... I am aware that people adapt the Ck and also Cdes in DES to get the desired behaviour of the model. However, I also agree with Alberto's opinion and therefore try to avoid changing the constants if...

Forum: OpenFOAM Running, Solving & CFD July 24, 2009, 09:14

Replies: 18 strange behaviour of the one-equation SGS model Views: 3,061 Posted By cfdmarkus You are right, it seems that the turbulent... You are right, it seems that the turbulent viscosity near the wall is too high, which in turn is responsible for a significantly delayed separation point and hence the suppression of vortex...

Forum: OpenFOAM Running, Solving & CFD July 24, 2009, 07:58

Replies: 18 strange behaviour of the one-equation SGS model Views: 3,061 Posted By cfdmarkus The setting for both cases are exactly the same... The setting for both cases are exactly the same since I just copied the entire folder. Also, if I start the simulations from an solution of the dynOneeqnEddy with a resolved flow field, the...

Forum: OpenFOAM Running, Solving & CFD July 23, 2009, 03:45

Replies: 18 strange behaviour of the one-equation SGS model Views: 3,061 Posted By cfdmarkus Hi The Reynolds number is ReD=1.6*10^5. ... Hi The Reynolds number is ReD=1.6*10^5. In the plot you can see the velocity magnitude, it would have probably been better to plot somethings like vorticity. I guess thats why it looks a bit...

Forum: OpenFOAM Running, Solving & CFD July 22, 2009, 04:42

Replies: 18 strange behaviour of the one-equation SGS model Views: 3,061 Posted By cfdmarkus strange behaviour of the one-equation SGS model Hi all, I am simulating the flow around two tandem cylinders using the one-equation SGS model with wall-functions. I set the the wall boundary conditions for nuSgs to nuSgsWallFunction and k to...

Showing results 1 to 7 of 7

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