Improved SPH simulation of the bouncing behavior of Oldroyd-B viscoelastic droplet
Based on the smoothed particle hydrodynamics(SPH)method,the bouncing behavior of an Oldroyd-B viscoelastic droplet impacting a solid wall was simulated and analyzed.Firstly,in order to resolve the tension instability exhibited in SPH simulations of viscoelastic free surface flows,an improved SPH method was proposed by combining the particle shifting technology.Then,the spreading behavior of the Oldroyd-B viscoelastic droplet impacting the solid wall was simulated by improved SPH,and the effectiveness of the method was verified by comparing the SPH results with some literature data.Furthermore,the bouncing behavior of the Oldroyd-B droplet was captured by decreasing the Reynolds number.On this basis,the effects of the viscosity ratio,Weissenberg and Reynolds numbers on the bouncing behavior of the droplet were analyzed.The results show that the improved SPH method could effectively simulate viscoelastic free surface flows.The viscosity ratio,Weissenberg and Reynolds numbers have significant effects on the maximum rebound height of the droplet.
万方数据
维普
