Hi, I´m with a problem to solve and I wish to know the better way to go. I get a hot gas inside a duct (300~400oC) wich will transfer heat to its wall and so to an external ambient (30°C) wich is next to another wall of concrete (300 mm thickness) and finally to another known ambient of air of 80°C. I wish to know the maximum temperature at the concrete wall. I believe the radiaton will be the principal heat transfer from the duct to the concrete wall. Can it be done in CFX 10? What are the basic steps for that? I will get 5 different regions. Thanks for any response, regards, Lucio