Question

Which of these equations are altered by the transient term in the PISO algorithm?

(a) both the first and second pressure-correction equations

(b) only the first pressure-correction equation

(c) only the second pressure-correction equation

(d) neither the first nor the second pressure-correction equations

I got this question by my college professor while I was bunking the class.

My query is from Transient SIMPLE and PISO Algorithms in portion Transient Flows of Computational Fluid Dynamics

Answer 1

The correct choice is (a) both the first and second pressure-correction equations

For explanation I would say: The transient PISO algorithm has two corrector steps and hence two pressure-correction equations. Both of these equations are affected by the transient term. The source terms of these equations are altered.