[HectorRedal]

Hi,


I would like to raise the following question from my side:
Does relaxation factor apply in transient problems?


I am currently studying the CBS algorithm for transient problem in fluids:
https://onlinelibrary.wiley.com/doi/...3E3.0.CO%3B2-7


The algorithm uses two factors: theta1 and theta2.
They are used in the follwoing manner:
Velocity: V(t=n+theta1) = V(t=n) * (1-theta1) + V(t=n+1) * theta1
Pressure: P(t=n+theta2) = P(t=n) * (1-theta2) + P(t=n+1) * theta2


Which value of theta1 and theta2 should I use for transient problems?
Is there any recommended value?
Can these parameters be considered "relaxation factors"?


Thanks for your kind support.


Best regards
Hector