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Originally Posted by Groth
No Jabo, you've got it wrong. Since flow is the same through all components in a series system, order will not affect their performance. It is true that the first bit will have higher pressure (at both inlet and outlet), but the pressure drop across it is what is related to its flow rate. I think you are looking at the pressure relative to atmospheric, and thinking that higher pressure there implies higher water velocities, but what matters in the delta-P from inlet to outlet.
And Bernoulli's equation is about energy conservation - the conversion of pressure energy or kinetic energy or gravitational potential energy into an equal amount of one of the others. It also relies on conservation of mass indirectly, in that it is built on conservation of volume of an incompressible fluid.
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I always pathetic at explaining my ideas and even worse at what I am trying to do here.
From what you are saying groth it transpires that doesn't matter the pressure and the only thing which counts is delta-P, right?
My use of basic Bernoulli was to say the least unfortunate and to imprecise for the level of knowledge of members here,
Butcher ->yes you are right, blocks aperture doesn't change
I was taling about whole loop where vessles diameter changes from one block/rad/reservoir etc to the other. Velocity of coolant decreases after each unit in a loop due to kinetic energy of coolants paticles being used to combat viscous forces+gravitational forces.