Y plus
 

Hi,

I'm using a k-epsilon turbulence model to simulate duct flow. I calculate Yplus from Y*Utau/Nu

Is the viscosity Nu the laminar viscosity or the sum of laminar and turbulent viscosities?

Thanks

Re: Y plus
 

I believe it is the laminar kinematic viscosity.

Re: Y plus
 

nu is kinematic viscosity. there is not such a thing as laminar kinematic viscosity, there is kinematic viscosity and eddy viscosity. Mikael Ersson is right.

Re: Y plus
 

Just to add to the forum: I believe, sometimes kinematic viscosity is called molecular viscosity and any other modelled viscosity is refered to differently, e.g. hyperviscosity, eddy-viscosity, etc.