OMG...
This ONLY applies to open loop my friend.

In a closed loop, you got 0 net movement.. because what is pulling up is being canceled by whats going down so you initially got 0 movement. The Kinetic Value in the system is negated by the potential value.
Once heat is added, you got convection (adding energy)... warm water wanting to go to the highest point while cold dropping.
explain please?
your saying that there is no movement?