cpu waterblocks thermal performance
cpu waterblocks thermal performance
(OP)
Howdy everyone,
I've been meaning to ask this question for a long time, but didn't know where to ask.
I have a question regarding the behavior of cpu water blocks thermal performance.
A typical thermal resistance vs flow rate graph is here: http ://www.swi ftnets.com /assets/im ages/produ cts/apogee /Single-Di e-TR_VS_FR -SMALL.PNG
My question is why is the relationship between flow and thermal resistance not linear, but pseudo inverse square?
I've been meaning to ask this question for a long time, but didn't know where to ask.
I have a question regarding the behavior of cpu water blocks thermal performance.
A typical thermal resistance vs flow rate graph is here: http
My question is why is the relationship between flow and thermal resistance not linear, but pseudo inverse square?





RE: cpu waterblocks thermal performance
http://www.swiftnets.com/products/APOGEEGT.asp
RE: cpu waterblocks thermal performance
Is this for school?
TTFN
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RE: cpu waterblocks thermal performance
So let me rephrase my question, why does the thermal performance trend taper off once above a few GPM and appear to be headed for a flat line?
RE: cpu waterblocks thermal performance
The convection heat transfer coefficient (htc) in plate heat exchangers is generally assumed to be proportional to G0.38 in laminar flow, and to G0.65 in turbulent flow, assuming the geometries and the thermophysical properties of the fluid don't change. Where G is the mass flow rate, generally incorporated in what is known as Re number.
In fact fluid properties change with temperatures (as a result of changing flow rates). For example, for water a drop in temperature increases the density, the viscosity and the Pr number, while decreasing the thermal conductivity. All of these factors also affect the value of the htc.
I wonder whether these considerations can be applied in the case of "cpu water blocks".
RE: cpu waterblocks thermal performance
Therefore, you'd expect asymptotic behavior.
TTFN
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