Improved SPH Approach to Branched Polymer Free Surface Flows Based on the XPP Model

In this work, an improved smoothed particle hydrodynamics (IMSPH) method is presented to simulate a polymer-free surface based on XPP model. The IMSPH is a coupled approach between smoothed particle hydrodynamics (SPH) method and the finite particle method (FPM), which possesses higher accuracy and better stability than SPH, especially on boundary. An artificial stress term is added to IMSPH for removing the unphysical phenomenon. The examples of impacting drop and jet buckling are investigated, and the influence of the physical parameters on moving free surface with high Weissenberg number is considered. All the numerical results agree well with the available data.