|March 11, 2013, 08:01||
Question about behaviour of the continuity converge accelerator observed
Join Date: Mar 2013
Location: London, UK
Posts: 3Rep Power: 4
I need help understanding why the following is happening.
I have a simulation of an aerofoil with a piccolo tube (for leading edge heating) in a free flow. I need to compare the results with and without the continuity convergence accelerator activated for coupled implicit solver.
The simulation runs fine without and gives expected results. Then, when I turn the CCA on the solution diverges, no matter what under-relaxation parameters I put in or if I ramp it for the CCA.
However if I initiate the problem and run it for 1 iteration without CCA then turn on CCA it solves. (If I initialise without then run with without having first run for even just 1 iteration it gives me a floating point error also).
I wondered if anyone could explain why this might be.
|Thread||Thread Starter||Forum||Replies||Last Post|
|AMI speed performance||danny123||OpenFOAM||19||October 24, 2012 07:44|
|Continuity question???||Jane||FLUENT||8||September 25, 2008 21:02|
|Simple Question Regarding Continuity Closure||RC||FLUENT||2||March 25, 2004 06:30|
|Continuity and the velocity-inlet b.c.||Ola Nordblom||FLUENT||0||October 20, 2002 15:07|
|question||K.L.Huang||CD-adapco||1||March 29, 2000 04:57|