FATAL: floating point exception (AMG divergence)
 

Hi, all.

I'm running a two-way FSI transient analysis. I have pressure at an inlet defined by a UDF. When the magnitude is 70 kPa, the simulation runs swimmingly; but when I use 100 kPa, Workbench yells about a floating point exception and says 'a solver failure occured during the run in the Structural system'. The structural system, however, points to Fluent which reports
"
Divergence detected in AMG solver: temperature
...
Error at Node 0: floating point exception"

Is there any way to work around this? Why does increasing the pressure value only result in some temperature error?

Any advice would be appreciated,
Kegan

Before this warning, an increasing number of cells were reported as reaching a temperature limit. I was able to view what cells were problematic by using an IsoSurface in CFD-Post. Changing the fluid domain geometry and initializing a dynamic remeshing scheme solved this problem.