Y+ value for K epsilon turbulence model

Jagan

Hello experts,

I'm trying to perform a steady state conjugate heat transfer simulation with K epsilon turbulence model.

In my problem, water glycol mixture flows through a liquid cooling channel of cross section 5*15mm at a flow rate of 10LPM. For the Y+ value of 30 the first layer height is over 0.5mm for the specified condition which seems pretty coarse.

Need your advice regarding whether is it strictly required to maintain Y+ values above 30 while using K epsilon model?

Thanks.

acupro

The wall functions in AcuSolve are valid through the entire boundary layer, so there really is no lower Y+ limit.

As a side note, if you really want to say with k-epsilon models, the realizable is typically better than the standard.