I am trying to study heat transfer between flue gases and air in a cross flow heat exchanger. I have a recuperator in which air is flowing and external shell in which flue gases are flowing. I have imported the geometry from solidworks and now I want to fill air within the recuperator and flue gas in the shell but I am unable to do so. Anyone with any idea how can I do that and proceed further with my problem will be of great help.
Below is the link to my project
if you need any further details regarding it, kindly let me know.