German standard methods for the examination of water , waste water and sludge ; sludge and sediments group s ; determination of the amenability to anaerobic digestion 德国检验水废水和污泥的标准方法.污泥和沉积物s
3.
Compared with traditional numerical methods such as the fem , fdm , etc , the lb method has several important features , including : simplicity in algorithm , easily programming , direct calculation of pressure from a state equation and amenability to simulate all kinds of flow field with complex boundaries , it also has much advantage in the respect of parallel computation because of its regional evolution 与传统的计算方法如fem 、 fdm等相比， lb方法具有算法简单、编程容易、压力可以通过状态方程直接求解、能够模拟各种复杂边界的流场等优点，并且计算的局域性使其在并行计算方面也具有很大的优势。
4.
At the same time , this thesis focuses on the theoretical research on the lbgk method and discusses the inner relation between the lbgk and the n - s equations . the relationship among the selection of velocity group , the forms of equilibrium distribution functions , and the macroscopic n - s equations is clearly revealed . lbgk method has many advantages , such as easy dealing with the complex boundary conditions and high amenability to parallel computing 本文系统地总结了各种lbgk模型，特别是对lbgk模拟二相流和多相流模型进行了认真地研究；同时从新的角度对lbgk进行了理论研究，用全新的方法探讨了lbgk和n - s方程的本质联系，清晰地揭示了速度族的选择、平衡态分布函数的形式和宏观ns方程三者之间的关系。
