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Forum: OpenFOAM Running, Solving & CFD

January 2, 2008, 23:40

Replies: 41

Attempting to validate force code with 2D cylinder

Views: 10,722

Posted By gtg627e

Srinath, I think you may ge

Srinath,

I think you may get decent results using low-Re models. For example, I am looking at the drag for a sphere at Re = 1e6 - 1e7 and I get reasonable results with kOmegaSST (low-Re...

Forum: OpenFOAM Running, Solving & CFD

December 13, 2007, 20:20

Replies: 41

Attempting to validate force code with 2D cylinder

Views: 10,722

Posted By gtg627e

Andrew, Do you enforce the

Andrew,

Do you enforce the following boundary conditions?

z-constant plane towards you (type empty)
z-constant plane away from you (type empty)

Since you problem is 2-D, the pancake...

Forum: OpenFOAM Running, Solving & CFD

December 13, 2007, 20:15

Replies: 41

Attempting to validate force code with 2D cylinder

Views: 10,722

Posted By gtg627e

Andrew, I think nu stands f

Andrew,

I think nu stands for kinematic viscosity.

Alessandro

Forum: OpenFOAM Running, Solving & CFD

December 13, 2007, 20:10

Replies: 41

Attempting to validate force code with 2D cylinder

Views: 10,722

Posted By gtg627e

Andrew, I forgot to mention

Andrew,

I forgot to mention the following:

nu = mu / rho

so your value of viscosity already includes information about density.

This means that:

Forum: OpenFOAM Running, Solving & CFD

December 13, 2007, 20:05

Replies: 41

Attempting to validate force code with 2D cylinder

Views: 10,722

Posted By gtg627e

Andrew, What is the depth o

Andrew,

What is the depth of your model the z-direction?
If it is large, it can introduce error in your force estimates. This is due to a really large aspect ratio of the cells closed to your...

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