|April 17, 2013, 02:19||
momentum & x-vel convergence, and reverse flow problem
Join Date: Feb 2013
Posts: 31Rep Power: 4
I have been using FLUENT for a while, trying out my own calculations and looking at past posts here. I still have some questions:
1, I have know that even if continuity residue does not really converge (say, to 1e-6), I can use mass flow rate to check that mass is conserved by getting a small number (say 0.5% of inlet mass flow). What about x-velocity residue convergence problem?
2, Some of my calculations has "reverse flow in <how many> faces in pressure outlet" during the iterations. They are intermittent, I can get 50+ iterations with reverse flow then 100 normal lines, then reverse flow appear again. My calculation is steady atate, which I want to use it as the initial condition for transient state. Is this normal? Or I should do something?
3, If I am running a transient simulation. as long as the residue are falling down, or falling until a pleateau, but doesn't reach 1e-6, is that ok?
My questions may be too "beginner" to you all. I really hope to get some expert advice. Thanks a lot!
|Thread||Thread Starter||Forum||Replies||Last Post|
|Convergence problem||paudelrahul||FLUENT||2||January 4, 2013 17:11|
|On and Off of Reverse flow warning||prince_pahariaa||FLUENT||1||December 24, 2011 06:22|
|Icepak Reverse flow.||Ashish||Main CFD Forum||2||December 12, 2011 06:11|
|Problem in convergence for simulate wind flow around building||lalula2||FLUENT||2||June 8, 2009 03:13|
|reverse flow||kam||FLUENT||2||July 31, 2006 09:14|