  In this paper, a finite volume lattice Boltzmann method (FVLBM) based on
cell-center unstructured girds is presented and full studied to simulate the
incompressible laminar flows, which is simple modified from the cell-vertex
unstructured girds FVLBM proposed by Stiebler et al. [Computers & Fluids, 2006,
35(8): 814-819]. Compared with other complex flux reconstruct methods, the
computational cost of present scheme is little and can achieve second-order
spatial accuracy, the temporal accuracy is adjustable depending on the temporal
discretization methods. Different boundary conditions are illustrated and easy
implement to the complex geometries. Four cases are testified to validate the
present method, including one plate driven Couette flow for accuracy test, flow
in the square cavity, flow over the single circular cylinder and more complex
double circular cylinders. Numerical experiments show that the present scheme
can use relatively few grid cells to simulate relatively higher Reynolds number
flow, steady and unsteady flows, demonstrate the good capability of the present
method.
