The Solver crahes with no helpful error, but does give the following warning on the iteration before failure:
+--------------------------------------------------------------------+
| ****** Notice ****** |
| Newtons method failed to converge in 100 iterations. This |
| occurred while computing the following variable: |
| |
| Variable Name : Total Temperature |
| Location Name : sparks |
| Mesh location : VERTICES |
| Mesh entity : |
| Last 3 Changes : 1.26616E+03 1.26326E+03 1.26767E+03 |
| Tolerance : 1.0000E-02 |
| |
| The Newton iteration was diverging. The solver will continue |
| with the variable field as it was on the final iteration. If |
| this situation continues you might try decreasing the Netwon |
| iteration under relaxation factor. This can be changed by |
| setting one of the following parameters: |
| |
| Temperature : "Constitutive Relation Under Relaxation" |
| Pressure : "Newton Pressure Under Relaxation" |
| |
| for your mixture using the definition file editor. |
+--------------------------------------------------------------------+
|
Check the CCL for your combustion calculation. For each domain, the combustion model section might read as follows: In dom1: FLUID MODELS: COMBUSTION MODEL: Eddy Dissipation Model Coefficient B = 0.5 Extinction Temperature = 5000[K]*(1-fcomb1)+700[K]*fcomb1 Option = Eddy Dissipation END In dom2: FLUID MODELS: COMBUSTION MODEL: Eddy Dissipation Model Coefficient B = 0.5 Extinction Temperature = 5000[K]*(1-fcomb2)+700[K]*fcomb2 Option = Eddy Dissipation END In dom3: FLUID MODELS:COMBUSTION MODEL: Eddy Dissipation Model Coefficient B = 0.5 Extinction Temperature = 5000[K]*(1-fcomb3)+700[K]*fcomb3 Option = Eddy Dissipation END Finally, in sparks: FLUID MODELS: COMBUSTION MODEL: Eddy Dissipation Model Coefficient B = 0.5 Extinction Temperature = 5000[K]*(1-fcombs)+700[K]*fcombs Option = Eddy Dissipation END The expression fcombs = fcomb1 + fcomb2 + fcomb3 should be added to the CEL section. |
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