Simulation of the 3D viscoelastic free surface flow by a parallel corrected particle scheme

In this work,the behavior of the three-dimensional(3D) jet coiling based on the viscoelastic Oldroyd-B model is investigated by a corrected particle scheme,which is named the smoothed particle hydrodynamics with corrected symmetric kernel gradient and shifting particle technique(SPH_CS_SP) method.The accuracy and stability of SPH_CS_SP method is first tested by solving Poiseuille flow and Taylor-Green flow.Then the capacity for the SPH_CS_SP method to solve the viscoelastic fluid is verified by the polymer flow through a periodic array of cylinders.Moreover,the convergence of the SPH_CS_SP method is also investigated.Finally,the proposed method is further applied to the 3D viscoelastic jet coiling problem,and the influences of macroscopic parameters on the jet coiling are discussed.The numerical results show that the SPH_CS_SP method has higher accuracy and better stability than the traditional SPH method and other corrected SPH method,and can improve the tensile instability.