Meng Fanlong, Luo Ling, Doi Masao, Ouyang Zhongcan
State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, 100190, Beijing, China.
Kavli Institute for Theoretical Physics China, 100190, Beijing, China.
Eur Phys J E Soft Matter. 2016 Feb;39(2):22. doi: 10.1140/epje/i2016-16022-9. Epub 2016 Feb 26.
We develop a new dynamical model to study the drying process of a droplet of soft matter solutions. The model includes the processes of solute diffusion, gel-layer formation and cavity creation. A new scheme is proposed to handle the diffusion dynamics taking place in such processes. In this scheme, the dynamics is described by the motion of material points taken on solute. It is convenient to apply this scheme to solve problems that involve moving boundaries and phase changes. As an example, we show results of a numerical calculation for a drying spherical droplet, and discuss how initial concentration and evaporation rate affect the structural evolution of the droplet.
我们开发了一个新的动力学模型来研究软物质溶液液滴的干燥过程。该模型包括溶质扩散、凝胶层形成和空洞产生的过程。提出了一种新的方案来处理这些过程中发生的扩散动力学。在该方案中，动力学由溶质上的物质点的运动来描述。将该方案应用于解决涉及移动边界和相变的问题很方便。作为一个例子，我们展示了干燥球形液滴的数值计算结果，并讨论了初始浓度和蒸发速率如何影响液滴的结构演变。
