Droplet migration, deformation, and orientation in the presence of a plane wall: A numerical study compared with analytical theories
Droplet migration, deformation, and orientation in the presence of a plane wall: A numerical study compared with analytical theories
复制标题
存在平面壁时的液滴迁移、变形和方向：与分析理论比较的数值研究
DOI：
10.1063/1.858629
复制
发表时间：
1993
影响因子：
4.6
通讯作者：
R. Heethaar
中科院分区：
文献类型：
--
作者：
W. Uijttewaal;E. Nijhof;R. Heethaar
使用斯托克斯流边界积分技术考虑靠近固定壁的线性单向剪切流中可变形液滴的运动。这个问题通过数值求解来规避现有分析模型的局限性，特别是在靠近壁面的区域。计算了颗粒的横向和纵向扰动速度，并与解析近似值进行了比较。尽管分析理论给出了合理的预测，但在壁距较小和颗粒变形较大时会出现较大偏差。这主要是由于所有分析模型都忽略了由于壁的存在而引起的粒子方向和变形的改变。
The motion of a deformable drop in linear unidirectional shear flow close to a fixed wall is considered using a boundary integral technique for Stokes flow. This problem is solved numerically to circumvent the limitations of existing analytical models, especially in the region near the wall. The lateral and longitudinal disturbance velocities of the particle were calculated and compared with analytical approximations. Although analytical theories give reasonable predictions, large deviations occur at small wall distances and large particle deformations. This is mainly due to the fact that the altered orientation and deformation of the particle, arising from the presence of a wall, is disregarded in all analytical models.