基于SPH-SDPD耦合方法的液滴定向输运多尺度数值研究

Study on the droplet dynamic wetting based on SPG-SDPD coupled multiscale algorithm

利用SPH-SDPD耦合方法对液滴定向输运现象进行多尺度数值计算,研究得出:当基底速度保持不变时,液滴疏水性越好,液滴承受剪切力的能力越差,在惯性力作用下,越容易发生定向输运;液滴在运动基底上的定向输运主要驱动力是惯性力,而恢复平衡的过程主要由表面张力和接触角滞后产生的力共同作用。

Multi-scale numerical calculations of the droplet directional transport phenomenon using the SPH-SDPD coupling method are carried out.It is concluded that:the better the droplet hydrophobicity,the worse the droplet's ability to withstand the shear force,the easier the directional transport occurs under the action of inertial force when the substrate velocity is kept constant;the main driving force for the directional transport of the droplet on a moving substrate is the inertial force,whereas the recovery of the equilibrium is mainly caused by the surface tension and contact angle.The forces generated by hysteresis act together.