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+ | ====== Intelligent Troubbleshooting via Relaxation ====== | ||
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+ | To avoid numerical oscillations during the initialisation phase, ENVI-met can " | ||
+ | This means that the new results of the equation are only partly used to obtain the solution. | ||
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+ | The principle mathematical formulation is | ||
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+ | <WRAP centeralign>'' | ||
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+ | where //X// is the variable (TKE or e in this case) and //relax// is the relaxation factor ranging from 1.0 to 0.0. \\ | ||
+ | For a relaxation factor of 1.0 the new result //X(new)// will be taken as a final result of the calculation. For relaxation factors below 1.0, the old value //X(old)// will be mixed with the new result to a certain extend, e.g. 30% for //relax// = 0.7. \\ | ||
+ | This method ensures, that short-time numerical oscillations will not crash the complete system. | ||
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+ | ENVI-met realises, if problems with the TKE-e equation system occur and dynamically adjusts the relaxation factor until the problem is solved or a factor of 0.1 is reached. | ||