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Search: Posts Made By: vkrastev
Forum: OpenFOAM Running, Solving & CFD February 10, 2011, 05:44
Replies: 21
Views: 13,059
Posted By vkrastev
Since for a given flow k and epsilon assume...

Since for a given flow k and epsilon assume different values in space and time, this formula can return only local informations about the turbulence level of the flow itself (which means that you can...
Forum: OpenFOAM Running, Solving & CFD December 13, 2010, 08:54
Replies: 21
Views: 13,059
Posted By vkrastev
In the first case, if you want to use a...

In the first case, if you want to use a roughWallFunction than you have to define properly the roughness parameter of your "landscape": since I have no practical experience with this kind of...
Forum: OpenFOAM Running, Solving & CFD December 10, 2010, 10:24
Replies: 21
Views: 13,059
Posted By vkrastev
Ok, so if I understand you properly you want to...

Ok, so if I understand you properly you want to model airflow over solid ground, am I right? If it so, than you have two options: 1) to use a High-Re turbulence model (such as, for instance, the...
Forum: OpenFOAM Running, Solving & CFD December 10, 2010, 09:54
Replies: 21
Views: 13,059
Posted By vkrastev
Yes, it would be generally ok. ...

Yes, it would be generally ok.



nutWallFunction and nutRoughWallFunction are quite standard stuff (the latter can take into account for wall roughness) and, in general, thay give satisfactory...
Forum: OpenFOAM Running, Solving & CFD December 10, 2010, 04:54
Replies: 21
Views: 13,059
Posted By vkrastev
Hi, I see a little bit of confusion here...You...

Hi, I see a little bit of confusion here...You are referring to nut as a "friction coefficient", am I right? Well, in the literature the friction coefficient (or, more properly, the skin friction...
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