facing problem in heat transfer coefficient

dhiraj

is there any one who is working on heat exchanger simulation , i am facing problem in giving htc to convective heat transfer on both side of concentrict tube heat exchanger ,my model is double pipe heat exchanger with inner copper tubing inside flow is hot water and outer flow is cold water in counter direction , i hav to give htc i.e hi at innerside and ho at outer side . there is conjugate heat transfer ,is it possible that it is automatically taken by software or i hav to give , please give me solution my mtech dessertation is delayed due to this