heat exchange

  1. F

    heat exchange between a tube and a box

    The problem is very easy but i cannot figure it out. I have a tube of L length, Dext and Dint. The tube is in a box of x,y,z dimensions. The box has a constant temperature of 37°C and it is full of water. The tube is inside the box and in the tube there is a flow of water. The Tin of the tube...