PISO algorithm
PISO algorithm (Pressure implicit with splitting of operator) proposed by Issa in 1985 without iterations and with large time steps and less computing effort. it is extension of SIMPLE algorithm which use in CFD computational fluid dynamics to solve Navier-stock equation.PISO Is a pressure velocity calculation procedure for Navier-stock equation developed originally for noniterative computation of unsteady compressible flow.but it has been adapted successfully on steady state problems.
PISO involves one predictor step and two corrector steps and In this conservation of mass is design to satisfy within the predictor corrector steps.