Adaptive generalized periodic boundary conditions for lattice Boltzmann simulations of pressure-driven flows through confined repetitive geometries.

摘要: An algorithm for an adaptive boundary condition the simulation of fully developed, pressure driven flows using lattice-Boltzmann method is introduced. The simulates effect solid walls confining a structure with dual periodicity, such as used in microfluidic devices. We combine recently introduced by Kim and Pitsch [Phys. Fluids 19, 108101 (2007)] treatment periodic structures controller loop that adjusts perpendicular gradient to suppress any net momentum outer walls. method's accuracy asymmetric geometries tested against array uses regularized zero-velocity conditions