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在耗散粒子动力学(DPD)中施加无滑移边界条件是较困难的,本文提出了一种新的处理方法来实现无滑移边界条件.通过选取合适的壁面与流体粒子之间的保守力系数可以控制近壁面区的粒子数,从而可以使密度波动降低至极小值,实现无滑移边界条件.通过该方法模拟泊肃叶流动求得的流体性质与通过使用Lees-Edwards边界条件模拟剪切流动所求得的流体性质一致,证明了该方法的可靠性.
It is more difficult to apply the non-slip boundary condition in dissipative particle dynamics (DPD). In this paper, a new method is proposed to realize the non-slip boundary condition. By choosing the appropriate wall between the fluid particle and the conservative The force coefficient can control the number of particles near the wall, which can reduce the density fluctuation to the minimum and realize the non-slip boundary condition.Through this method, the fluid properties obtained from the Poiseuille flow simulation are compared with those obtained by using the Lees-Edwards boundary conditions The fluid obtained by shear flow has the same properties, which proves the reliability of this method.