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Unread 07-17-2002, 03:47 AM   #15
gmat
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Join Date: Mar 2001
Location: France
Posts: 1,221
Default CFD to the rescue

People, try a search on "CFD" in this forum (it was in the thread title).
You'll get a lot of answers.
(I'm at work so i don't have time to do it for U, sorry)
Ah and look at the K4.1 block (which is K4.2 now i think). It's a top performer, and has a design you'll find familiar... I think it has "stagnant flow" in some spots but somehow it doesnt hamper its performance.
Anyways, designing an efficient fluid system is very counter-intuitive. Thats where CFD or great math skillz help a lot (hello Bernouilli, Navier-Stokes...). There are *so* many important parameters that solving this by hand or intuition is impossible, unless you've got the skills of Newton or Enstein.

What you'll want to consider is
- flow restriction vs pressure and turbulence
- flow path length vs backpressure
- base plate thickness vs heat spreading / resistance / capacity
- channel cross section shape vs manufacturing costs
- channel pathway for optimal cooling (crossflow ?) vs flow path length and restriction
- inlet / outlet placement and multiple inlets or outlets ?
- flow path complexity (surface area) vs manufacturability and efficiency
- channel shape vs liquid properties (glycol, methanol, WW, etc...)
Each of these is solvable, but not easily, even with CFD. No wonder ppl are earning a living out of this.
The problem is heavily multi-dimensional , and I'm not sure there's only one solution to it. There's no such thing as "the ultimate block".
One good thing to do is, build it and experiment

V12:
point 3 - i dont get it. You could have a nuclear turbine as a pump, you'd still get "stagnant flow" spots (ok much less, but relatively speaking) ..?
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