Unsymmetric CG method failed
Unsymmetric CG method failed
(OP)
Hello guys,
I am trying to run the cfd-thermal analysis. My model was working fine until, I changed the specific heat of the fluid and I started getting this error message.
"Unsymmetric CG method failed catastrophically"
I checked all the boundary conditions and constraints. They seem to be correct as the previous model was running fine. Only modification was the value of the specific heat.
Does anyone why does this occur and how to resolve this error?
I am trying to run the cfd-thermal analysis. My model was working fine until, I changed the specific heat of the fluid and I started getting this error message.
"Unsymmetric CG method failed catastrophically"
I checked all the boundary conditions and constraints. They seem to be correct as the previous model was running fine. Only modification was the value of the specific heat.
Does anyone why does this occur and how to resolve this error?





RE: Unsymmetric CG method failed
RE: Unsymmetric CG method failed
RE: Unsymmetric CG method failed
RE: Unsymmetric CG method failed
RE: Unsymmetric CG method failed
wouldn't it be possible that the new value of specific heat causes a physical nonsense somewhere, such as reaching negative absolute pressure or non-positive temperature (in K)? This could only be the case if there is a fixed-power heat sink or source somewhere, otherwise I can't see it...
Never used the fluid part of ANSYS, so I don't know, but would it be possible to solve the problem for small intermediate timesteps and see at what point it is running into troubles?
Regards
RE: Unsymmetric CG method failed