Hi, To help me understand two phase cooling etc. I have some simplified heat pipe questions: If a sealed, vertical pipe, half filled with water has heat applied to its bottom half and the top half is held at 120C, is it safe to say that the inner surface of the bottom half of the pipe will also stay at 120C (assuming it stays under water)? Once the water reaches 120C, will the pressure remain the same regardless of how much heat is applied? Finally, what would be the effect of lowering the pressure inside the pipe before any heat is applied (as with real heat pipes)? Thanks, Y.