Search Results

Showing results 1 to 4 of 4
Search took 0.00 seconds. Search: Posts Made By: scipy

Forum: Main CFD Forum

April 6, 2012, 16:59

Replies: 13

Convergence Problem

Views: 1,705

Posted By scipy

Yes, they oscilate. ANSYS says in their...

Yes, they oscilate. ANSYS says in their documentation that timestep choice is "correct" if the residuals fall by 2-3 orders of magnitude within 15-20 subiterations in a timestep. (sometimes they just...

Forum: Main CFD Forum

April 5, 2012, 06:02

Replies: 13

Convergence Problem

Views: 1,705

Posted By scipy

I'm afraid you're off a bit there. LES is...

I'm afraid you're off a bit there. LES is transient and you can get time averaged values, this part is correct, but a steady state simulation means solving just 1 "snapshot" in flow time.

Imagine...

Forum: Main CFD Forum

April 4, 2012, 14:12

Replies: 13

Convergence Problem

Views: 1,705

Posted By scipy

Because LES models the large eddies that form and...

Because LES models the large eddies that form and dissipate over time, so it requires a transient (time dependent) case ranging from t=0 seconds to t=X seconds and then the time difference split into...

Forum: Main CFD Forum

April 3, 2012, 17:29

Replies: 13

Convergence Problem

Views: 1,705

Posted By scipy

If these fluctuations are periodic/sinusoidal,...

If these fluctuations are periodic/sinusoidal, then the problem you are investigating might be inherently somewhat transient. As long as the velocity (or any other monitor) oscilates around a certain...

Showing results 1 to 4 of 4

Forum Jump

All times are GMT -4. The time now is 05:26.