The three-dimensional (3D) lattice Boltzmann models,3DQ15,3DQ19 and 3DQ27,under different wall boundary conditions and lattice resolutions have been investigated by simulating Poiseuille flow in a circular cylinder for a wide range of Reynolds numbers.The 3DQ19 model with improved Fillippova and Hanel (FH) curved boundary condition represents a good compromise between computational efficiency and reliability.Blood flow in an aortic arch is then simulated as a typical haemodynamic application.Axial and secondary fluid velocity and effective wall shear stress profiles in a 180 bend are obtained,and the results also demonstrate that the lattice Boltzmann method is suitable for simulating the flow in 3D large-curved vessels.
