CFD Online Logo CFD Online URL
Home > Forums > CFX

Fatal overflow in linear solver

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   June 2, 2012, 03:11
Default Fatal overflow in linear solver
New Member
Join Date: Apr 2011
Posts: 13
Rep Power: 8
James113 is on a distinguished road
Hi all,
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,
James113 is offline   Reply With Quote

Old   June 2, 2012, 06:29
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 14,076
Rep Power: 109
ghorrocks is a jewel in the roughghorrocks is a jewel in the roughghorrocks is a jewel in the roughghorrocks is a jewel in the rough
No, this error means the linear solver has diverged. See FAQ:
ghorrocks is offline   Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Fatal overflow in linear solver error. Why? zaidun CFX 7 August 11, 2016 05:59
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
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

All times are GMT -4. The time now is 02:21.