[xisluke]

Hi guys! I have two different questions regarding how Fluents deals with PISO and SIMPLE algorithms:

1 - It seems that Fluent allows the user to set up a pressure-based transient problem implementing the PISO algorithm and contemporary defining under-relaxation factors... Does it make sense? I was pretty convinced that under-relaxation are related to SIMPLE or PIMPLE schemes...

2 - I saw also that for Fluent it's possible to perform transient analysis with SIMPLE algorithm, another time, does it make any sense? I always considered SIMPLE for steady state problems...

Could you guys correct me if I am wrong? I'm trying to understand if my CFD knowledge needs some improvements or simply Fluent allows the user to set up also non feasible settings ahah! Thank you!