[Gravity_13]

Hi ,
So right now I’m working on cooling ducts for a brake disc I’m really confused regarding how do I setup the problem to know how the brakes are being cooled at different inlet air velocities.
I was using the mesh motion and wall temperature but I don’t see any changes in the temperature of the brake.
Should i be doing the transient are steady state?

[CFDKareem]

It will depend on what you are trying to accomplish with the simulation. If you are looking at the brake cooling during constant breaking, you can do steady-state. In this case you will apply a constant heat generation rate on the face of the rotor modeing the heat generated from friction. The results of this model will tell you how much heat can be dissapted by the rotor and what steady state temperature they will reach under certain heat generation and cooling rates.

If you want to see how fast the rotor will cool (assuming you just let off the breaks and are moving again) you will have to do a transient simulation. In this case you can intialize the rotor to a certain temperature and monitor how fast the rotor cools to equlibrium.

For the modeling approach, a moving mesh should work.

[Gravity_13]

Hi thanks for the answer,
So i want to do a thermal equilibrium but how do i set up the problem in fluent as I already tried mrf zone but using transient state it reaches flotation point for some reason.
So can i get a info on how to setup the simulation.
Thank you