Subashni Ravichandran
Ansys Employee
Hello John Monaghan You can broadly select faces that enclose the Fluid region and use the 'Select seed face' option to extract the volume. I would recommend you to go through the below videos for a better understanding. You can use keywords such as 'Volume Extract' in the Search bar to look for more examples on the Discovery Forum Please let me know if these suggestions works out for you.