论文标题
从稀释悬浮液中撤出纤维期间的颗粒夹带
Entrainment of particles during the withdrawal of a fiber from a dilute suspension
论文作者
论文摘要
从稀颗粒悬浮液浴中撤出的纤维表现出不同的涂层状态，具体取决于液体的物理特性，提取速度，粒径和纤维的半径。我们的实验表明，只有没有颗粒的液体才能用于薄涂层膜。超过阈值毛细管数，纤维被带有夹带颗粒的液体膜覆盖。我们系统地表征了毛细管数，粒径和光纤半径在粒子夹带的阈值速度上的作用。我们讨论了这两个方案之间的边界，并表明停滞点处的液体膜的厚度控制着夹带过程。纤维的半径在毛细管滤波中提供了新的控制程度，从而可以更大地控制膜中夹带的颗粒的大小。
A fiber withdrawn from a bath of a dilute particulate suspension exhibits different coating regimes depending on the physical properties of the fluid, the withdrawal speed, the particle sizes, and the radius of the fiber. Our experiments indicate that only the liquid without particles is entrained for thin coating films. Beyond a threshold capillary number, the fiber is coated by a liquid film with entrained particles. We systematically characterize the role of the capillary number, the particle size, and the fiber radius on the threshold speed for particle entrainment. We discuss the boundary between these two regimes and show that the thickness of the liquid film at the stagnation point controls the entrainment process. The radius of the fiber provides a new degree of control in capillary filtering, allowing greater control over the size of the particles entrained in the film.
