|July 26, 2011, 14:31||
Problem with Mixing plane
Join Date: Feb 2011
Posts: 20Rep Power: 8
I am trying desperately to run a simulation of a centrifugal compressor with ideal gas CO2. The machine is running at operating condition (around 80 bar) with ideal gas.
I managed to have a converged solution with density based solver, Implicit formulation and second order upwind schemes for all the fluid properties. However, I am using Axial AREA Averaged mixing plane.
If I try to restart the simulation switching to Mixed-out mixing plane (as recommended by the fluent manual), even with very small CFL and under relaxation parameters, the simulation blows up.
If I look at the results just after applying the mixing-out average mixing plane it seems like a very high pressure is generating around the mixing plane.
Does anyone have any experience using mixed-out mixing plane? I do not see a solution to this problem: The mixed-out mixing plane seems very unstable and as soon as an adverse pressure gradient is built the simulation crashes because of backflow!!! Please, help
|Thread||Thread Starter||Forum||Replies||Last Post|
|mixing plane model: too much backflow and does not converge||sbhi||FLUENT||1||December 4, 2014 01:31|
|Total mass flow/flux through a plane problem||nwalters||FLUENT||1||December 18, 2010 13:23|
|Air & water mixing problem||praveenkumar||FLUENT||0||April 15, 2010 02:14|
|Unable to switch from Rotating Reference Frame to Mixing Plane||bwg||FLUENT||0||July 10, 2009 14:56|
|Turbine stage mixing plane calculation||Knut||FLUENT||0||December 4, 2007 13:46|