|June 2, 2012, 03:11||
Fatal overflow in linear solver
Join Date: Apr 2011
Posts: 13Rep Power: 6
I am trying to solve a two way FSI Problem in CFX (Ansys 13).
First I will explain the CFX problem:
Blood simulator flows in an elastic pipe (latex).
The elastic pipe is deformed by an external pressure acting on the surface
(limitted area). The pressure is a time dependent function -- P0*sin(F0*t).
Now, to my problem:
The CFX is working great on frequencies (F0) varying from 6Hz to 21Hz, but when I am trying to apply a 22Hz pressure, the simulation crashes after 1,500 iterations (nothing is changed except the frequency).
I read a little about this error and I know it's related to unphysical boundary conditions. But the boundary conditions haven't changed.
Thanks in advance,
|June 2, 2012, 06:29||
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 10,929Rep Power: 85
No, this error means the linear solver has diverged. See FAQ: http://www.cfd-online.com/Wiki/Ansys...do_about_it.3F
|Thread||Thread Starter||Forum||Replies||Last Post|
|solution diverges when linear upwind interpolation scheme is used||subash||OpenFOAM||0||May 29, 2010 01:23|
|free C code for large sparse matrix linear solver||ztdep||Main CFD Forum||7||May 24, 2007 14:14|
|Fatal overflow in linear solver error. Why?||zaidun||CFX||3||June 9, 2006 09:12|
|Solver: Fatal Bounds error detected||hagupta||CFX||5||March 24, 2006 11:17|
|solver for linear system with large sparse matrix||Yangang Bao||Main CFD Forum||1||October 25, 1999 04:22|