Least-squares finite-element lattice Boltzmann method.
A new numerical model of the lattice Boltzmann method utilizing least-squares finite element in space and Crank-Nicolson method in time is presented. The new method is able to solve problem domains that contain complex or irregular geometric boundaries by using finite-element method's geometric flexibility and numerical stability, while employing efficient and accurate least-squares optimization. For the pure advection equation on a uniform mesh, the proposed method provides for fourth-order accuracy in space and second-order accuracy in time, with unconditional stability in the time domain. Accurate numerical results are presented through two-dimensional incompressible Poiseuille flow and Couette flow.
Li
Yusong
Y
Department of Civil and Environmental Engineering, Vanderbilt University, Nashville, Tennessee 37325, USA.
LeBoeuf
Eugene J
EJ
Basu
P K
PK