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Forum: OpenFOAM

November 30, 2011, 15:11

Replies: 63

nutWallFunction

Views: 24,116

Posted By idrama

As you can probably see is the this formula just...

As you can probably see is the this formula just a fixed point formula which is being solved in 10 iteration. Take a pen and paper and compute a couple of steps by using k=0.4 and E=9.8 then you...

Forum: OpenFOAM

October 28, 2011, 07:06

Replies: 63

nutWallFunction

Views: 24,116

Posted By idrama

Loop up in Versteeg pp. 275ff; there is a...

Loop up in Versteeg pp. 275ff; there is a description about the entire procedure. I used by my self yesterday.
...

Forum: OpenFOAM

March 20, 2011, 18:15

Replies: 63

nutWallFunction

Views: 24,116

Posted By idrama

You dont have to calculate the nut values for...

You dont have to calculate the nut values for inlet and outlet. You just have to set:

inlet
{
type calculated;
value uniform 0;
}

wall
{

Forum: OpenFOAM

March 18, 2011, 08:06

Replies: 63

nutWallFunction

Views: 24,116

Posted By idrama

The wall function are only used at the wall and...

The wall function are only used at the wall and not at a inlet or outlet patch. Since the nut value is composed of k and epsilon, you should set a "calculated" BC at the inlet and the outlet,...

Forum: OpenFOAM

March 18, 2011, 06:52

Replies: 63

nutWallFunction

Views: 24,116

Posted By idrama

Hey kurne, wall functions are used to model...

Hey kurne,

wall functions are used to model the velocity profile at the first node to the wall. Model based on magnitudes such as k, epsilon, nut, wall shear stress, friction velocity and so on....

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