In this paper,we study a class of contact smoothed particle hydrodynamics(SPH)by introducing Riemann solvers and using high-order limiters.In particular,a promising concept ofWENO interpolation as limiter is presented...In this paper,we study a class of contact smoothed particle hydrodynamics(SPH)by introducing Riemann solvers and using high-order limiters.In particular,a promising concept ofWENO interpolation as limiter is presented in the reconstruction process.The physical values relating interactional particles used as the initial values of the Riemann problemcan be reconstructed by the Taylor series expansion.The contact solvers of the Riemann problem at contact points are incorporated in SPH approximations.In order to keep the fluid density at the wall rows to be consistent with that of the inner fluid wall boundaries,several lines of dummy particles are placed outside of the solid walls,which are assigned according to the initial configuration.At last,the method is applied to compressible flows with sharp discontinuities such as the collision of two strong shocks and the interaction of two blast waves and so on.The numerical results indicate that the method is capable of handling sharp discontinuity and efficiently reducing unphysical oscillations.展开更多
基金supported by the Fundamental Research Funds of Central University(B103093)Key Laboratory Foundation of Coastal Disasters.
文摘In this paper,we study a class of contact smoothed particle hydrodynamics(SPH)by introducing Riemann solvers and using high-order limiters.In particular,a promising concept ofWENO interpolation as limiter is presented in the reconstruction process.The physical values relating interactional particles used as the initial values of the Riemann problemcan be reconstructed by the Taylor series expansion.The contact solvers of the Riemann problem at contact points are incorporated in SPH approximations.In order to keep the fluid density at the wall rows to be consistent with that of the inner fluid wall boundaries,several lines of dummy particles are placed outside of the solid walls,which are assigned according to the initial configuration.At last,the method is applied to compressible flows with sharp discontinuities such as the collision of two strong shocks and the interaction of two blast waves and so on.The numerical results indicate that the method is capable of handling sharp discontinuity and efficiently reducing unphysical oscillations.
