CAJ | 학술논문

流体在固体表面的速度滑移对宏观流动的影响通常可以忽略,但在研究微尺度流动时,滑移速度可能对流动产生较大的影响.因此在研究微尺度流动时,需要考虑流动在边界上的滑移.耗散粒子动力学方法是模拟介观尺度下流体的动力学行为的计算方法,目前该方法一般使用无滑移的边界条件.提出一种在耗散粒子动力学中实现滑移边界条件的数值方法,得到了和Navier滑移边界条件的Poiseuille流精确解吻合的速度剖面.
류체재고체표면적속도활이대굉관류동적영향통상가이홀략,단재연구미척도류동시,활이속도가능대류동산생교대적영향.인차재연구미척도류동시,수요고필류동재변계상적활이.모산입자동역학방법시모의개관척도하류체적동역학행위적계산방법,목전해방법일반사용무활이적변계조건.제출일충재모산입자동역학중실현활이변계조건적수치방법,득도료화Navier활이변계조건적Poiseuille류정학해문합적속도부면.
Velocity slippage on a solid wall is usually neglected in macroscopic flow.However,the effect of slippage on the fluid dynamics can be significant in a microscopic scale.Therefore,slip condition at solid boundary should be considered in microscopic or mesoscopic hydrodynamics.Dissipative particle dynamics(DPD)is a promising approach to the study of mesoscale hydrodynamic behaviors.No-slip boundary conditions are widely used in previous DPD simulations.A numerical method for imposing slip boundary conditions was proposed in the DPD simulation.To show validity of the approach,velocity profiles obtained by DPD are found to be consistent with the analytic solutions based on Navier condition for the Poiseuille flow.