I should never post when im that drunk/tired.
Anyway quickly..
I was talking about effectiveenss (noncap epsilion), but couldnt remember the name. I was trying to get over how effectiveness would be more helpful in showing performance as a) it gives a baseline of possible performance b) shows how a block performs over a wide range, particularly for low flow where temprature graphs become asymtotic.
Oh and while i remember i found a paper by one of my lectures who is trying to use turbulators to improve cooling performance
. hes interested in cooling hot air with a cold plate but some of the same principals are going to apply. He used dimples (hemisperical extrusions) instead of machined more brick like surfaces.