[CFD] The PISO Algorithm

[CFD] The PISO Algorithm

An overview of the key stages in the PISO (Pressure-Implicit Splitting of Operators) Algorithm that was proposed by Issa (1986). The algorithm is used to solve unsteady incompressible flows in a segregated manner. The following topics are covered:

1) 1:16 What is the pressure-velocity coupling problem for incompressible flows?

2) 19:34 How is the PISO algorithm different to the SIMPLE algorithm?

3) 22:44 Why is under-relaxation not used in the PISO algorithm?

4) 33:07 How are non-orthogonal correctors employed in the PISO algorithm?

#pisoAlgorithm #fluidmechanics101 #cfd

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Disclaimer
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The methods, algorithms, equations, formulae, diagrams and explanations in this talk are for educational and demonstrative purposes only. They should never be used to analyse, design, accredit or validate real scientific / engineering / mathematical structures and flow systems. For such applications, appropriate trained, qualified and accredited (SQEP) engineers / scientists should be consulted along with the appropriate documentation, procedures and engineering standards. Furthermore, the information contained within this talk has not been verified, peer reviewed or checked in any way and is likely to contain several errors. It is therefore not appropriate to use this talk itself (or any of the algorithms, equations, formulae, diagrams and explanations contained within this talk) as an academic or technical reference. The reader should consult the original references and follow the verification and validation processes adopted by your company / institution when carrying out engineering calculations and analyses. Fluid Mechanics 101 and Dr. Aidan Wimshurst are not accountable or liable in any form for the use or misuse of the information contained in this talk beyond the specific educational and demonstrative purposes for which it was intended.