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Search: Posts Made By: vwibaut
Forum: OpenFOAM June 12, 2013, 10:31
Replies: 17
Views: 2,959
Posted By vwibaut
According to the Fluent user guide, the...

According to the Fluent user guide, the performance of a high-Re model decreases when you have y+<30. So I think it is the same with OpenFOAM.
Spalding wallFunction allows y+<30. In my case it is...
Forum: OpenFOAM June 12, 2013, 09:40
Replies: 17
Views: 2,959
Posted By vwibaut
In my opinion, typically for high Reynolds number...

In my opinion, typically for high Reynolds number model with the use of the spalding wallFunction: kwall = kqRWallFunction
eps wall: epsilonWallFunction
muwall: mutUSpaldingWallFunction


When...
Forum: OpenFOAM June 6, 2013, 13:30
Replies: 17
Views: 2,959
Posted By vwibaut
1) & 2) omegaWallFunction assigns the good value...

1) & 2) omegaWallFunction assigns the good value for omega at the wall regardless the type of turbulence model (low or high)

3) Where? (inlet, outlet, wall)?
Forum: OpenFOAM June 6, 2013, 12:49
Replies: 17
Views: 2,959
Posted By vwibaut
I see this in an other post but it seems that in...

I see this in an other post but it seems that in several cases, k-omegaSST (with low-Re) works fine
Forum: OpenFOAM June 6, 2013, 12:46
Replies: 17
Views: 2,959
Posted By vwibaut
for high Reynolds, you have to choose...

for high Reynolds, you have to choose wallfunction for k, epsilon (or omega). The choice of wallFunction is made in the mut file. You can choose spaldingWallFunction which allows mesh with y+< 30...
Forum: OpenFOAM June 6, 2013, 11:06
Replies: 17
Views: 2,959
Posted By vwibaut
omega on walls: although for a k-eps model you...

omega on walls: although for a k-eps model you have to set k = 0 and eps=0 on walls. According to my understanding for a k-omega omega isn't 0 on walls. If you use the omega WallFunction it will...
Forum: OpenFOAM June 6, 2013, 03:31
Replies: 17
Views: 2,959
Posted By vwibaut
Hi eshan :) Yes I would like to make a...

Hi eshan :)

Yes I would like to make a low-Reynolds simulation in a nozzle. I attached a case with k-omegaSST model with boundary conditions for low-Reynolds simulations (I think).
Forum: OpenFOAM March 11, 2013, 16:03
Replies: 17
Views: 2,959
Posted By vwibaut
Hi sebastian, Did you find something? I have...

Hi sebastian,

Did you find something? I have to simulate a flow in a nozzle and I would like to use this turbulence model.
Other question: Could you post your boundary condition for the k-omega...
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