Buoyancy and capillary effects on floating liquid lenses

Floating rings in vertical soap films : capillary driven bidimensional buoyancy

The present study aims to investigate the motion of buoyant rings in vertical soap films. Thickness differences and related bi-dimensional densities are considered as the motor leading to bi-dimensional buoyancy. We show how this effect can be re-interpreted thanks to surface tension profiles in soap films. We propose a model involving surface tension profiles in order to describe the motion of buoyant particles in vertical soap films, and compare it to experimental data.

受限气泡的连续生成：黏性对重力–毛细断裂的影响

Continuous generation of confined bubbles: viscous effect on the gravito-capillary pinch off

本文研究受限黏性液体中空气连续生成气泡的机制，通过标度分析揭示黏性耗散与浮力重力能量变化的平衡，并提出低 Reynolds 数下的新型重力–毛细断裂条件。

曲面间蒸发毛细桥的界面热流体粘附动力学

Interfacial-Thermo-Fluid-Adhesion Dynamics of Evaporating Capillary Bridges between Curved Surfaces

研究曲面间蒸发毛细桥的界面热流体粘附动力学，开发全耦合瞬态数值框架，综合分析多种因素影响，验证模拟方法，揭示蒸发特性受多种因素制约，明确马兰戈尼流主导及基板曲率等对毛细力和粘附力的影响。

Spreading of a 2D granular analogue of a liquid puddle: predicting the structure and dynamics through a continuum model

When sand flows out of a funnel onto a surface, a three dimensional pile that is stabilized by friction grows taller as it spreads. Here we investigate an idealized two dimensional analogue: spreading of a pile of monodisperse oil droplets at a boundary. In our system the droplets are buoyant, adhesive, and in contrast to sand, here friction is negligible. The buoyant droplets are added to the pile one-at-a-time. As the aggregate grows, it reaches a critical height and the 2D pile spreads out across the barrier. We find that, while granularity is important, the growth process is reminiscent of…

内部流动与颗粒-基底相互作用对胶体固着液滴蒸发沉积图案的影响

Impact of internal flow and particle-substrate interaction on deposit patterns during evaporation of a colloidal sessile droplet

本文通过有限体积数值模拟研究胶体液滴蒸发中的颗粒沉积，比较三种物理模型，揭示径向流主导咖啡环效应而马兰戈尼流使其均匀化，并阐明基底-颗粒相互作用及热浮力的影响。

The effect of viscous relaxation on the spatiotemporal stability of capillary jets

The linear spatiotemporal stability properties of axisymmetric laminar capillary jets with fully developed initial velocity profiles are studied for large values of both the Reynolds number, $Re=Q/(π\,a\,ν)$, and the Froude number, $Fr=Q^2/(π^2\,g\,a^5)$, where $a$ is the injector radius, $Q$ the volume flow rate, $ν$ its kinematic viscosity, and $g$ the gravitational acceleration. The downstream development of the basic flow and its stability are addressed with an approximate formulation that takes advantage of the jet slenderness. The base flow is seen to depend on two parameters, namely a S…