SYMPTOM:
If a definition file is read into CFX-Pre and then re-written, then convergence behaviour can be different even if nothing was changed that ought to affect convergence.
PROBLEM:
CFX-Pre is not consistent about what order it writes the region data into the definition file. If this order changes, then the solver may solve things in a slightly different order which can affect convergence (although not the converged solution). This is only likely to be a significant effect when the convergence of the case is particularly sensitive.
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WORKAROUND: In some cases it may be possible to avoid rewriting the definition file i.e. by editing the command file directly instead of using CFX-Pre to re-write the whole definition file. FIXED IN: ANSYS CFX 11.0 Update 1. |
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