Linearizing the destruction terms of the transport equations for 
and 
the ratio 
appears. It is reformulated to improve robustness when using high-Reynolds
number versions of the Standard-k-ε and RNG model. The formulation reads:
 | (4–63) |
The coefficient 
has a default value of 1 and can be accesses via the rpvar
'coeff-ke-mu-dok.
Note: if an UDF is used for the eddy viscosity, then this relation is not applied and instead
the ratio is evaluated directly.