seeta gunti
Ansys Employee

Hello Mantovani,

As Macro and Amine has mentioned, Pi is a non dimensional number which they should mention in the paper or they would have given some reference paper about this. If they did not discuss about the non-dimensional number, they should give the units of the domain right! So I suggest please go through the paper once again and check if they mentioned anywhere. If not, try to look at the reference papers.