Prashanth
Ansys Employee

For liqH2 and vapH2 refporp nist properties, you need to create RGP files and use it. Also, you can model this CHT application, need to just patch and solve the other channel or region with only air. Check the Fluent user and beta manuals for instructions.

8.16.6. Using Real Gas Property (RGP) Table Files

7.1. Real Gas Property (RGP) Table Files