Jabo I've read what you have written a few times now and still don't understand what you are getting at.
You seem to be suggesting that a water blocks performance is not just a function of the flow rate but also related to the absolute pressure in the block. This suggests to me that you are talking about the density of the water. i.e. the higher the absolute pressure, the greater the density of the water, thus the water needs to travel at a higher velocity to maintain the same flow rate. Is that right?
In my limited experience I have always dealt with water as incompressible and I wouldn't have thought that there would be much change in the specific volume of the water at the kind of pressures we are dealing with. However, I may have completely misunderstood. If so, any clarification would be appreciated
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