[gdimitris]

Hey people,

I am having a gas turbine blade and I would like to calculate the spacing from walls to finally insert it to turbogrid. So I have the following questions about it:

1)Freestream velocity : which should be the free stream velocity, the absolute or the relative ?

2) reference length (m): which should be the reference length ?

I am using this calculator http://www.pointwise.com/yplus/

Thank you.