how to calculate the viscous dissipation rate for a turbulent pipe flow
The transport equation for the mean kinetic energy reads as follows:
if we apply Boussinesq hypothesis, the equation can be rewritten as:
and for a turbulent pipe flow, the dissipation rate can be defined as:
In which D is the diameter of the pipe, is the density of water, these parameter are known. My question is equals to which term in the equation, is it the last term?
and how can we compute it ?
thank you in advance,
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