Hydraulic diameter & Reynolds number
 

Dear all,
I am simulating the fluid flow and heat transfer characteristics associated with cooling an in-line array of discrete protruding heat sources in a channel by using impinging jet.
How is FLUENT calculating hydraulic diameter for this channel?
How is FLUENT calculating Reynolds Number in this channel?


Thanks with regards,

Faisal

Hey guy
Regarding to hydraulic diameter, I think there's no difficulty, calculate it according to
(4*A)/P
A is the cross area and P is is wetted perimeter of your entrance geometry.
Regarding to the 2nd question, run your model, get the result and define Reynolds number via, define/ Custom field function. The only thing is to define your formula. Once you define it, it'll be available like other variable and you can postprocess it whatever you like.