Find in Library
Search millions of books, articles, and more
Indexed Open Access Databases
Consistent Velocity–Pressure Coupling for Second-Order <i>L</i><sup>2</sup>-Penalty and Direct-Forcing Methods
oleh: Arthur Sarthou, Stéphane Vincent, Jean-Paul Caltagirone
Format: | Article |
---|---|
Diterbitkan: | MDPI AG 2020-06-01 |
Deskripsi
The present work studies the interactions between fictitious-domain methods on structured grids and velocity–pressure coupling for the resolution of the Navier–Stokes equations. The pressure-correction approaches are widely used in this context but the corrector step is generally not modified consistently to take into account the fictitious domain. A consistent modification of the pressure-projection for a high-order penalty (or penalization) method close to the Ikeno–Kajishima modification for the Immersed Boundary Method is presented here. Compared to the first-order correction required for the <inline-formula> <math display="inline"> <semantics> <msup> <mi>L</mi> <mn>2</mn> </msup> </semantics> </math> </inline-formula>-penalty methods, the small values of the penalty parameters do not lead to numerical instabilities in solving the Poisson equation. A comparison of the corrected rotational pressure-correction method with the augmented Lagrangian approach which does not require a correction is carried out.