i want to simulate an liquid cooler for a CPU. For that I had a look into the solvers and thought that the solver
For that I have to change the transportProperties file from air into water (25°C)
In my case I calculated the turbulent prandtl with that equation:
After that I calculated mu/mu_t and then nu_t = mu_t/rho.
Is that correct?
Thanks in advance
The turbulent Prandtl number is not really a property of the liquid. You obtain it from the Boussinesq (or gradient diffusion) hypothesis (not to be confused with the Boussinesq approximation) from the turbulent heat flux,
and then it is assumed that scales wit or , but this is by no means a way to estimate the turbulent Prandtl number. It is a property of the turbulence more than a property of the liquid. I think in general, is somewhere in the range 0.7 to 0.9. But please read a bit more on this in books or papers to be absolutely sure.
a good start could be from a neighbor case multiRegionLiquidHeater .it contains a file for water properties.
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