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Forum: Main CFD Forum April 27, 2012, 10:43
Replies: 32
Views: 8,142
Posted By cdegroot
That is what I was thinking as well. It seems...

That is what I was thinking as well. It seems like you definitely need two chambers for periodicity. Thanks for the sketch by the way. That was what I was trying to explain above but was too lazy...
Forum: Main CFD Forum April 26, 2012, 20:45
Replies: 32
Views: 8,142
Posted By cdegroot
As an example, let's say you were computing the...

As an example, let's say you were computing the gradient of a quantity PHI on the east face of a volume adjacent to the outflow boundary. To do this implicitly it would be (PHI(1)-PHI(N))/DELTAX,...
Forum: Main CFD Forum April 26, 2012, 20:04
Replies: 32
Views: 8,142
Posted By cdegroot
Hmm... so this is not your standard periodic...

Hmm... so this is not your standard periodic problem since the outflow and inflow are not in line with one another. I would make two suggestions:

(i) I would suggest simulating two chambers such...
Forum: Main CFD Forum April 25, 2012, 11:44
Replies: 32
Views: 8,142
Posted By cdegroot
Sounds like you are probably correctly setting a...

Sounds like you are probably correctly setting a reference pressure. Monitor your residuals though and make sure this isn't the place where the simulations starts diverging. I have found though...
Forum: Main CFD Forum April 25, 2012, 09:51
Replies: 32
Views: 8,142
Posted By cdegroot
You definitely need to specify a pressure drop...

You definitely need to specify a pressure drop then across the domain. However, you might be seeing the simulation diverge if you aren't setting the pressure level anywhere in the domain. If you...
Forum: Main CFD Forum April 23, 2012, 16:36
Replies: 32
Views: 8,142
Posted By cdegroot
As stated before it is a matter of connecting...

As stated before it is a matter of connecting your inlets and outlets as neighbours in your code. However, if you want to specify a certain mass flow you need to be able to determine the appropriate...
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