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Forum: OpenFOAM Running, Solving & CFD

February 12, 2008, 03:07

Replies: 4

How to specify BCs to solve a Poiseuille flow

Views: 1,958

Posted By kar

Thank you, Niels! I was think

Thank you, Niels!
I was thinking in a quick way - take a plane of cylinder and calculate for it.. Actually different problem is solved in such way.

Forum: OpenFOAM Running, Solving & CFD

February 11, 2008, 16:14

Replies: 4

How to specify BCs to solve a Poiseuille flow

Views: 1,958

Posted By kar

I checked solution more carefu

I checked solution more carefully and .. trouble doesn't stop - I have almost exactly 2x greater U values comparing with analytical!

So in SI:
nu = 1e-4,
geometry: dx=0.01, dy=0.1,...

Forum: OpenFOAM Running, Solving & CFD

February 11, 2008, 14:55

Replies: 4

How to specify BCs to solve a Poiseuille flow

Views: 1,958

Posted By kar

Oh, I see a parabolic velocity

Oh, I see a parabolic velocity distribution now and it feels so good! The problem was - I forgot to take into account a fact, that for icoFoam pressure must be divided by density. So I tried to solve...

Forum: OpenFOAM Running, Solving & CFD

February 11, 2008, 14:01

Replies: 4

How to specify BCs to solve a Poiseuille flow

Views: 1,958

Posted By kar

Hello, I was trying to solv

Hello,

I was trying to solve a parabolic flow in 2D square-like domain.

* In blockMeshDict and boundary file I specified just "patch" for inlet and outlet,
* In /0/U I set zeroGradient on...

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