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Originally posted by Dieter@be
1) I think that my system resembles the jet impingement, in my design the water is also pressend on the bottom, but in my design the water can get away better, then in jet impingement blocks...so I think.
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The "water getting away better" is not what you want. Let's think of it this way. The easier it is for the water to "get away", means that the water isn't really smashing into stuff and helping to strip away the boundary layer.
By very nature of physics, one simply must make the block restrictive in order to get the water to attempt to break-down the boundary layer.
The challenge of course is making it restrictive in the correct places where the heat is.
Quote:
Originally posted by Dieter@be
2) Is it true dat copper can deform when in use (because the center is hotter ?)
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Yes. When the copper gets warmer above the CPU die, it will very slightly become more convex.
Quote:
Originally posted by Dieter@be
3)Could I do without an O-ring? I think I would just do some silicone between the top and bottom part and then bolt it tightly together...
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Design choice. I like O-rings. O-rings are harder to implement than a simple gasket, but they make for a better mating between two surfaces and are easier to work with when disassembling and reassembling.
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Originally posted by Dieter@be
4) What kind of fittings should I use? (considering the water is pushed on the block in the shape of the core-->need good pressure)
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Your choice. I favor brass barbs.
Quote:
Originally posted by Dieter@be
5)What kind of pump should I use?
Eheim 1048 (600l/hour), Eheim 150 (1200l/hour), Eheim 1046 (300l/hour),... so much to chose from 
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Again, this is a design choice. The pump you choose will dictate the optimal design parameters for your block.
There's no such thing as "overkill" when it comes to radiators.
