论文标题
液体泡沫中的粗糙度引起的摩擦
Roughness-induced friction in liquid foams
论文作者
论文摘要
已知复杂的液体流量会受到界面处的粗糙度条件的巨大影响。我们结合了应力测量和在干燥液体泡沫中不同粗糙表面运动过程中流动的观察。我们从视觉上表明存在三种不同的摩擦机制：打滑，滑动运动和锚定肥皂膜。根据现有模型，我们的压力测量值对滑板和锚定状态进行了验证，我们提出了一项杠杆规则，以描述粘性滑移状态期间的应力。我们发现，棒状滑移或锚定状态的发生由粗糙度因子控制，该因子定义为表面浅层大小与高原边界的曲率半径之间的比率。
Complex liquids flow is known to be drastically affected by the roughness condition at the interfaces. We combined stresses measurements and observations of the flow during the motion of different rough surfaces in dry liquid foams. We visually show that three distinct friction regimes exists: slippage, stick-slip motion, and anchored soap films. Our stress measurements are validated for slippage and anchored regimes based on existing models, and we propose a leverage rule to describe the stresses during the stick-slip regime. We find that the occurrence of the stick-slip or anchored regimes is controlled by the roughness factor, defined as the ratio between the size of the surface asperities and the radius of curvature of the Plateau borders.
