[justjhy]

Hi all,

I know that the solver Yplus is used in the wall function during calculation.
Recently, I read CFX Theory guide and i found that the solver Yplus of Scalable wall function is based on n/4
and that of Automatic wall treatment is based onn.

Where n is physical distance between first and second nodes from wall boundary.

Since CFX generates its control volumes around each mesh node including boundary nodes,
it makes sense that Scalable wall function uses n/4 for wall distance.

However, why does Automatic wall treatment adopt n as wall distance for the solver Yplus?

I referred [Chapter 2.8.1.2 Solver Yplus and Yplus, CFX Theory guide, (p. 143)].
No helpful explanation was found in the documentation.
I hope to have an answer from wise man...

Thank you in advance.

Best regards,

H. Chung