Two transportModels in same solver
 

Hi foamers,
How to define, implement and use Two different transportModels in the same solver let's say simpleFoam, and how their two different viscosities can be called back inside this solver?

the idea is let's say i need to use:
transportModel1 powerLaw
transportModel2 crossPowerLaw

how to define transportModel1, and transportModel2
and how can i use their two different viscosities of the two Laws used ?

Help pleaaaaaase

thanks a lot