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How to specify the patch for yPlus calculation

Hello everyone

I have an already finished simulation of flow around Naca 0012 airfoil inside a tunnel with k-wSST turbulence model. Can you please tell me how to calculate y+ for the airfoil ?
is it possible to use this syntax:

Code:

pimpleFoam -postProcess -func "yPlus(airfoil)"

I need your help please
Another question, if I have many walls, and I want to calculate y+ only at a specific wall say the airfoil, how to proceed?