Expert Parametrs doubt CFX
Guys, I'm working on a hard reactive system monofasico.Logo at the beginning occurs the following problem:
Newton's method warnings at: END OF TIME STEP | + ------------------------------------------------- ------------------- + + ------------------------------------------------- ------------------- + | | | Newton's method failed to converge while computing the variables | | Listed below. In each case, the solver continued with the variable | | The field it was on the last iteration. | | | | If this situation persists, you might try decreasing the Newton | | Iteration underrelaxation factor. This can be changed by setting | | Following one of the parameters for your mixture: | | | | Temperature: "Constitutive Relation Under Relaxation" | | Pressure: "Newton Under Pressure Relaxation" | | | + ------------------------------------------------- ------------------- + | | | Location Name: Serpentine | | Mesh location: Vertex | | Routine: UPD_LOCALE_PROP1 | | Partition: 12 | | Variable Name: Temperature | | Last 3 Changes: 1.01653E 1.15153E + 30 + 30 + 30 1.09939E | | Tolerance: 1.0000E-02 | | Status: Diverging | | Max Iterations: 100 already checked the fluid properties, expressions, boundary conditions. one option would be acting on expert parameters Does anyone know where I can change the expert parametrs the following variables pressure and temperature? |
I would look at numerical stability problems before the expert parameters. Try double precision numerics, better mesh quality, a better initial condition and/or smaller time steps.
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It is unlikely you got this problem from the same method as the previous post. As I said before, this is a sign of numerical instability, so you should look at issues which contribute to numerical instability.
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