CFD Online Discussion Forums

CFD Online Discussion Forums (
-   OpenFOAM Running, Solving & CFD (
-   -   SimpleFoam pipe flow velocity blowup (

gzink June 9, 2006 16:52

Hi, In order to make sure I

In order to make sure I'm running OpenFoam correctly, I am running simpleFoam for a straight pipe with a small pressure differential that should induce a constant velocity through the pipe.

I use pressureInlet and pressureOutlet to specify the pressures on either end of the pipe and initialize the internal flow to the velocity I expect from Bernoulli.

What I keep seeing is that the velocity is constant through the pipe, but the magnitude just keeps rising with each iteration, and never converges. I can run this case in Fluent, and it converges very quickly.

Does anyone have any idea why the velocity field would increase in this way?

Greg Z.

All times are GMT -4. The time now is 01:42.