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-   -   calculation stops and BICGStab did not converge (http://www.cfd-online.com/Forums/star-ccm/98206-calculation-stops-bicgstab-did-not-converge.html)

vandermessi March 5, 2012 21:38

calculation stops and BICGStab did not converge
 
When I try to run the calculation, it failed and the output is as below, who has met this problem and solved it?


BiCGStab did not converge !
* CFL 5.00000e+00 -> 5.00000e-01...
BiCGStab did not converge !
A floating point exception has occurred: floating point exception [Invalid operation]. The specific cause cannot be identified. Please refer to the troubleshooting section of the User's Guide.
Command: RunSimulation
CompletedCommand: RunSimulation
In: [Machine::main, SimulationIterator::startSimulation, SteadySolver::step]
error: Server Error

siara817 March 6, 2012 04:19

I had this problem, and it was because of the mesh quality. check the cell quality by Threshold. Find the worst cells. choose the Cell quality remediation model in the Physics models. Also you can right click on your regions and remove the low quality cell if they are few.
good luck


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