Nanofluid: Dual Core Tests and Review

[relttem]

the density change is negligible, so the pumping power doesn't change. We looked into this. It will work fine with an all aluminum set-up. I think I mentioned, maybe in the WCG section, that your heat transfer at the block is based on this:

Q = h*A*(T2-T1)

Q is the power input..this will vary depending on what you are doing on the computer.
A is the area of the block..this is constant.
T2-T1 is the fluid temp difference between the exit of the block and the entrance.
h is the convective coefficient, which is higher for nanofluid than it is for water - that is what we found in our research, and other research projects have found the same thing.
So, straight up, based on the Q-equation, if h increases and A and (T2-T1) are constant. Then Q has to increase to balance the equation, which means you can dump more heat into the nanofluid.
If you look at the equations above, you have Nu = XRe^aPr^b, Pr is going to be pretty constant. If you increase Re your Nu will go up. Nu= (h*D)/k. If Nu goes up then h has to go up, because D(diameter) is constant, k(thermal conductivity of nanofluid) is constant - h has to change to balance. That is what that paper/quote above about pump power is talking about. But, your pressure drop is going to increase the faster you pump..so much that you might have leaks and other issues. It is a study. You have to find where everything can reach its highest point without any failures. And, it is a trade-off..bigger pumps, larger radiators, more fans = $$ and noise.