引入了一种二元Lattice boltzmann Model(LBM),实现了两种液体组成的混合流的模拟.不同于其它的类似模型,它区分考虑了流体的粘性和扩散特性,可以很容易地模拟各种互溶或者不互溶的混合流现象.此外,由于LBM的运算大都是线性的局部运算,这使得它很容易在可编程图形处理器(Graphics Process Unit,GPU)上进行加速,从而进行实时模拟.给出了若干二元混合流的模拟结果.
A multispecies, multispeed lattice boltzmann model is presented to study the mass diffusion properties. At each node the total momentum of all particles and the partial masses of the particles of same species are cons...
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A multispecies, multispeed lattice boltzmann model is presented to study the mass diffusion properties. At each node the total momentum of all particles and the partial masses of the particles of same species are conserved. Using the Chapman-Enskog method, we have derived from the BGK boltzmann equation the N-S equation and partial mass conservation equations. We have compared the measured diffusivities with the theoretical values for different single relaxation time, showing good agreemellt. We have carried out the 2-D convection-diffusion simulations on a 16o × 100 hexagonal lattice. At the initial time we inject a bubble of radius r(= l6 nodes), at rest, filled with particles of one species into a uniform flow of particles of the other species. The mean velocity v = 0.5 is along the horizontal axis. One clearly observes the deformation and the diffusion of the bubble.
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