Ji-Hyun Jeon
Thanks to your help, I was able to read the document. 
But it's my first time writing a command, so I don't know how to start it. I want to give Heat flux to face 2 (top), Heat flux 2 to face 1 (bottom), and each Radiation to face 1 and 2 (top, bottom). Is there an example to look at and refer to? 
Please help me. Thank you.