Question

To overcome the performance issues of the PISO algorithm, which of these methods is used?

(a) Time-steps based on temporal schemes are used

(b) Large time-steps are used

(c) First-order temporal differencing is used

(d) Higher-order temporal differencing is used

Answer 1

Right option is (d) Higher-order temporal differencing is used

The explanation: The need for a small time-step in the PISO algorithm is overcome by using higher-order temporal differencing schemes. For example, a second-order implicit scheme with three time levels can be used.