Abstract: In the paper, a numerical study on symmetrical and asymmetrical laminar jet-forced flows is carried out by using a lattice Boltzmann method (LBM) with a special boundary treatment. The simulation results are in very good agreement with the available numerical prediction. It is shown that the LBM is a  competitive method for the laminar jet-forced flow in terms of computational efficiency and stability.

Key words: lattice Boltzmann method;shallow water equations;laminar jet-forced flow