help in using permeability coefficeint
 

In order to finalize my last test at university of florence as mechanical engineer, i'd like help for the following: scope: simulation of a vacuum stean condenser consisting of A-roof finned boundle by using Star-CD. My question is how to simulate a finned tube bank airside pressure drop as calculated by Robinson and Briggs formula. In particular my interest is in finding in the right way alpha and beta coefficient for Star-CD.

yours friendly, Michele