Survey on Smoothed Particle Hydrodynamics and the Particle Systems <s> C. COUPLING OF SPH WITH OTHER METHODS <s> The body of bird is much weaker than aluminium alloy,so it performs more liquid characteristic when it impacts on aluminium alloy leading edge.A method is introduced to simulating the bird impact on aircraft leading edge with SPH and FEM coupling method by PAM-CRASH.By using SPH element to simulate the bird and PLINK element to simulate the rivet between skin and ribs,from the analysis a perfect result can be get.The SPH bird model increases the stability of the calculation and correctly simulates the splash phenomenon of bird in impact process. <s> BIB001 </s> Survey on Smoothed Particle Hydrodynamics and the Particle Systems <s> C. COUPLING OF SPH WITH OTHER METHODS <s> In this paper,a coupling smoothed particle hydrodynamics(SPH) and molecular dynamics (MD) method is constructed.Using this numerical scheme,the liquid argon flow is simulated under different driving force for different micro-channel width.The results of velocity distribution and viscosity distribution reveal that the microscale effect is very strong when the channel is narrow. Furthermore,while the width becomes wider,the microscale effect grows weaker and the flow characteristic is closer to the macroscale Poiseuille flow. <s> BIB002 </s> Survey on Smoothed Particle Hydrodynamics and the Particle Systems <s> C. COUPLING OF SPH WITH OTHER METHODS <s> To study the touchdown explosion in sand foundation,a coupled smooth particle hydrodynamic-finite element method(SPH-FEM) was undertaken in the frame of LS-DYNA.The coupled SPH-FEM method combined with high efficiency of FEM and superiority of SPH in dealing with large deformation is appropriate for the description of large deformation induced by explosion.It can reproduce the whole evolution of crater through the moving of the particles.The numerical results show that the blast waves show the similar features of strong discontinuous shock in the close-in region of explosion.Large deformation of sand is significantly induced by compression.Variability of soil properties has certain influence on crater sizes and should be considered in design and application.Simulation results of crater shapes and sizes have a good coincidence with the empirical values predicted by ConWep.The coupled method is applicable to blasting simulations. <s> BIB003
The SPH method can be coupled with the grid method; thus, it has respective advantages. The coupling of SPH and FEM has been very common, which is suitable for solving large deformation problems, such as collision impact BIB003 - BIB001 . The SPH method could be coupled with the discrete element method (DEM) to solve the problem of particle and droplet impact  . SPH can also be coupled with other particle methods, such as MD BIB002 (molecular dynamics coupling) and DSMC (direct simulation Monte Carlo) for chemical separation flow simulation.