[MrAndersDk]

Hello

I've tried to modify the snappyMultiRegionHeater example to make a simple heat plate exchanger. It consist of a side with a flow of cold water, and a side with a flow of hot water, and a thin plate seperating the two sides. (The flow is a cross flow configuration)

The case is setup kinda correct. Understood in the way that the solver starts, however, after a few iterations the temperature blows up, and it fails with errors.

I think that it may be my BC's that are setup wrong, but not sure.

Hopefully someone has time to take a look at my case, and give me some pointers on what could be going wrong?

heatExchanger5.zip