|October 21, 2010, 09:34||
Outlet BC:Fully developed flow
Join Date: Oct 2009
Posts: 28Rep Power: 7
I have a question about the BC's for the outlet of a straight pipe. Everywhere the OF tutorials (most of them), zeroGradient is used for both temperature and velocity at the outllet. By that, the code is assuming the flow is fully developed, right? So, what if I want to simulate a short pipe? Which BC's should I use for the outlet?
I'm asking that beacuse I was comparing the results from OF and CFX (using a short pipe), and they were very different. Then I reduced the diameter and the results are now very similar. I don't know which conditions CFX uses for the outlet, but I think that was the problem with my simulation.
|Thread||Thread Starter||Forum||Replies||Last Post|
|pressure outlet (open channel flow)||Willem Brantegem||Main CFD Forum||0||April 3, 2007 10:39|
|How Other Conditions Impact Mass Flow Rate Outlet||andy P.||Main CFD Forum||2||February 9, 2007 11:41|
|VOF Outlet boundary condition in cfd - ace||JM||Main CFD Forum||0||December 15, 2006 09:07|
|outlet boudary condition for a flow in the pipe||Atit||CFX||2||November 9, 2004 18:43|
|Define outlet with varying flow reistance in CFX||Coriolius||CFX||1||October 29, 2004 18:31|