6533b7d4fe1ef96bd126308f
RESEARCH PRODUCT
A boundary condition for arbitrary shaped inlets in lattice-Boltzmann simulations
Tuomo RossiJari HyväluomaAmos FolarinKeijo Mattilasubject
geographygeography.geographical_feature_categorybusiness.industryApplied MathematicsMechanical EngineeringComputational MechanicsLattice Boltzmann methodsReynolds numberGeometryMechanicsComputational fluid dynamicsPhysics::Classical PhysicsInletBoltzmann equationPhysics::GeophysicsComputer Science ApplicationsPhysics::Fluid Dynamicssymbols.namesakeMechanics of MaterialssymbolsVector fieldBoundary value problembusinessLattice model (physics)Mathematicsdescription
We introduce a mass-flux-based inlet boundary condition for the lattice-Boltzmann method. The proposed boundary condition requires minimal amount of boundary data, it produces a steady-state velocity field which is accurate close to the inlet even for arbitrary inlet geometries, and yet it is simple to implement. We demonstrate its capability for both simple and complex inlet geometries by numerical experiments. For simple inlet geometries, we show that the boundary condition provides very accurate inlet velocities when Re less than or similar to 1. Even with moderate Reynolds number, the inlet velocities are accurate for practical purposes. Furthermore, the potential of our boundary condition to produce inlet velocities which convincingly adapt to complex inlet geometries is highlighted with two specific examples. Copyright (C) 2009 John Wiley & Sons, Ltd.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-01-01 | International Journal for Numerical Methods in Fluids |