Learning Forum

[zain.qazi]

Update: The pressure peaks were probably due to the way I chose to initialize the solution by patching it at 24 bar and having a 21.4 bar outlet BC. I initialized with the outlet and reduced the wall temperature (150 K) as a starting point and the simulation runs very well with Global Time Step at Default URFs.

But this wall temperature needs to be ramped up to 463 K. and going to 190 K already shows fluctuating (within a specific range) monitors for e.g the pressure in the picture below. I am wondering if this could be a problem of the flavour of RPI that I am using which right now is the standard one. Any insights on this would be very helpful. 

Also, any tips on whether to use Psuedo Time Stepping (Global Time Step) is a good way to proceed or not or maybe playing around with Flow Courant number could be helpful here.

 

Thanks