Yochelis A, Knobloch E, Pismen L M
Department of Physics, University of California, Berkeley, CA 94720-7300, USA.
Eur Phys J E Soft Matter. 2007 Jan;22(1):41-9. doi: 10.1140/epje/e2007-00011-4. Epub 2007 Feb 21.
A mesoscale fluid film placed on a solid support may break up and form droplets. In addition, droplets may exhibit spontaneous translation by modifying the wetting properties of the substrate, resulting in asymmetry in the contact angles. We examine mechanisms for droplet formation and motion on uniform and terraced landscapes, i.e., composite substrates. The fluid film stability, droplet formation and velocity are studied theoretically in the isothermal case using a lubrication approach in one spatial dimension. The droplet properties are found to involve contributions from both the terraced layer thickness and molecular interactions via the disjoining potential.
置于固体支撑物上的中尺度流体薄膜可能会破裂并形成液滴。此外，通过改变基底的润湿性，液滴可能会表现出自发平移，从而导致接触角不对称。我们研究了在均匀和梯田状地形（即复合基底）上液滴形成和运动的机制。在等温情况下，使用一维润滑方法从理论上研究了流体薄膜稳定性、液滴形成和速度。发现液滴特性涉及梯田层厚度和通过分离势的分子相互作用的贡献。
