Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2009-07-16
J. Stat. Mech. (2009) P09017
Physics
Condensed Matter
Soft Condensed Matter
13 pages, 11 figures, 1 table
Scientific paper
10.1088/1742-5468/2009/09/P09017
A velocity boundary condition for the Lattice Boltzmann simulation technique has been proposed recently by Hecht and Harting[arxiv:0811.4593]. This boundary condition is independent of the relaxation process during collision and contains no artificial slip. In this work, this boundary condition is extended to simulate slip-flows. The extended boundary condition has been tested and it is found that the slip length is independent of the shear rate and the density, and proportional to the BGK relaxation time. The method is used to study slip in Poiseuille flow and in linear shear flow. Patterned walls with stripes of different slip parameters are also studied, and an anisotropy of the slip length in accordance with the surface pattern is found. The angle dependence of the simulation results perfectly agrees with theoretical expectations. The results confirm that the proposed boundary conditions can be used for simulating slip-flows in micro fluidics using single relaxation time lattice Boltzmann, without any numerical slip, giving an accuracy of the second order.
Ahmed Nayaz Khalid
Hecht Martin
No associations
LandOfFree
A boundary condition with adjustable slip length for Lattice Boltzmann simulations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A boundary condition with adjustable slip length for Lattice Boltzmann simulations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A boundary condition with adjustable slip length for Lattice Boltzmann simulations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-622463