A modified lattice Boltzmann model with a stochastic relaxation mechanism mimicking "virtual" collisions between free-streaming particles and solid walls is introduced. This modified scheme permits to compute plane channel flows in satisfactory agreement with analytical results over a broad spectrum of Knudsen numbers, ranging from the hydrodynamic regime, all the way to quasi-free flow regimes up to Kn ~ 30.
EPL (Europhysics Letters)
- Pub Date:
- February 2005
- Nonlinear Sciences - Chaotic Dynamics;
- Nonlinear Sciences - Cellular Automata and Lattice Gases;
- Physics - Fluid Dynamics
- 4 pages, 4 figures