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Outflow boundary conditions for the lattice Boltzmann method. (English) Zbl 1139.76045
Summary: We propose lattice Boltzmann implementations of several Navier-Stokes outflow boundary conditions like the zero normal-stress, the Neumann, and the do-nothing rule. A consistency analysis using asymptotic methods is given and the algorithms are numerically tested in two space dimensions with respect to accuracy and interaction with the inner flow field.

MSC:
76M28 Particle methods and lattice-gas methods
76D05 Navier-Stokes equations for incompressible viscous fluids
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