[csmistry]

I am doing heat transfer analysis inside the tube. i modeled cylindrical domain and analys the problem then i though of inserting plate (insert) in tube to enhance heat transfer so i modeled tube with insert in three ways... 1. cut the portion from tube2. frozen the strip and 3. freedge the strip but non of that is giving me idea to define region...lioke inlet,outlet,outerwall,strip but while solving problem it gives error of more parameter and not permitting me to solve... how to move ahead...