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首页> 外文期刊>Bulletin of the American Physical Society >APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - The role of convective acceleration in determining the velocity and dynamic angle at the contact line
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APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - The role of convective acceleration in determining the velocity and dynamic angle at the contact line

机译：APS-APS流体动力学分部第70届年会-事件-对流加速度在确定接触线上的速度和动态角度方面的作用

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摘要

The major challenges associated with the moving contact line problem are in determining the velocity and the dynamic contact angle at the contact line. Our theoretical and numerical studies show that the key factor common to both is the role of convective acceleration in the vicinity of the moving contact line. We present our unified slip boundary condition, which demonstrates that slip velocity near a contact line is not just dependent on shear rate, but also on linear strain rate. Also, we present a microscopic dynamic contact angle model that shows dependency not only on surface tensions of respective interfaces, but also on their gradients. The presence of both the linear strain rate and surface tension gradient in the vicinity of the contact line is attributed to convective acceleration.
机译：与移动接触线问题相关的主要挑战在于确定接触线的速度和动态接触角。我们的理论和数值研究表明，两者共同的关键因素是在移动接触线附近的对流加速作用。我们提出了统一的滑移边界条件，该条件表明接触线附近的滑移速度不仅取决于剪切速率，还取决于线性应变率。此外，我们提出了微观动态接触角模型，该模型不仅显示了各个界面的表面张力的依赖性，还显示了其梯度的依赖性。接触线附近同时存在线性应变率和表面张力梯度，这归因于对流加速度。

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