Dissipative particle dynamics simulation for the density currents of polymer fluids
作者： Yanggui Li , Xingguo Geng , Zhijun Liu , Qingsheng Liu , Jie Ouyang
DOI: 10.1140/EPJP/I2016-16388-7
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摘要: In this work, the two-dimensional lock-exchange density currents of polymer fluids are numerically investigated using dissipative particle dynamics (DPD) at mesoscale level. A modified finitely extensible nonlinear elastic (FENE) chain model is chosen to describe system, which perfectly depicts not only tension but also repulsion between adjacent beads with bond length as equilibrium one segment. Through and numerical simulation, we analyze behavior fluids. comparison its Newtonian counterpart suggests that interface two more smoothed, front structure different from case because Kelvin-Helmholtz instability cleft suppressed by polymer. Besides, probe influences volume concentration, extensibility on currents. These simulation results show increasing any parameters, length, extensibility, inhibiting effect becomes significant.
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