I created a new simulation project called 'PC Case':
Flow inside my PC case
More of my public projects can be found here.
nice idea for a simulation. You can use this tutorial as an inspiration for a convective heat transfer analysis: Convective Heat Transfer Analysis - Raspberry Pi
For a common CFD analysis the procedure is pretty straight forward. If you want to know anything related to that feel free to ask us or contact me privately anytime you like.
All the best,