Effective downstream boundary conditions for incompressible Navier–Stokes equations
- 30 October 1994
- journal article
- research article
- Published by Wiley in International Journal for Numerical Methods in Fluids
- Vol. 19 (8) , 693-705
- https://doi.org/10.1002/fld.1650190805
Abstract
The aim of this paper is to give open boundary conditions for the incompressible Navier–Stokes equations. From a weak formulation in velocity–pressure variables, some natural boundary conditions involving the traction or pseudotraction and inertial terms are established. Numerical experiments on the flow behind a cylinder show the efficiency of these conditions, which convey properly the vortices downstream. Comparisons with other boundary conditions for the velocity and pressure are also performed.Keywords
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