A new lattice Boltzmann method is proposed for constructing a 1-D scheme by using bi distribution functions and Godunov scheme of decomposition. The Ideal Case(IC) problem has been hence removed.

Based on the equivalence between the aerdynamical Euler equation and the shallow water long wave equation, the equilibrum distribution function of the orginal LBM is improved, and hence the macrodynamical equation of shallow water long waves is derived. The resoults of one dimentional numerical test are compaired with those obtained by discrete velocity model.

A new lattice Boltzmann model is proposed for treating Euler equations. The numerical example shows that it can be used to simulate shock wave and contact discontinuity. The results are comparable with those obtained by traditional methods.

A Lattice Gas Method has been used for conservation equation in a model equation by defined general distribution function. The model became a bridge between Lattice Gas Method and Finite Difference Method. It is shown that the method is effective by simulating model equation with MacCormark and Warming Beam schemes.

The 7-Bit model of Lattice Boltzmann Method is used for simulation the porous media. Darcy law are found and the relationships of void ratio coefficient of viscosity and density with permeabilities are obtained as well.

In this paper, a lattice gas mode! is proposed to simulate gravity. We evaluated the average of gravity and obtained a macroscopic parameter k.When 0≤k≤0.02, The pressure distribution obtained is in agreement with the theoretical predictions.

We discuss a alternative technique to the lattice gas automata for the study of viscous flows. It is shown that the lattice gas automata with real number population deriving from the HPP model being free from microscopic fluctuations. provides a new appealing tool to simulate viscous flows. Numerical results pertaining to a two-dimensional flow past a square cylinder are reported and compared with experimental data available in the literature.

The first part of this paper gives complete collision rules for FHPⅡ 7-bits model of lattice gas automata. Some of them are irreversibe, them are different from the extension given by other authors.The second part is an example computed by the LGS method. Initial and boundary conditions are treated appropriately A random method is to ensure the conservation of the total particles number with a little stochastic fluctuation. Macro-velocitis are got through averaging over a time interval and smoothing on space. The results are in good agree ment with the classical concepts.