Reply To: Sound Speed and Cv of Aungeir-Redlich-Kwong EOS in ANSYS Fluent 2020 R1

[Nilay Pedram]

Hello,
For real gases, no need to get the derivatives to get the speed of sound as you can get the information from post-processing (under contour or other instances). For Cv, you can probably get it using UDFs. 
Hope this helps. Thanks!