Particle accumulation in high‐Prandtl‐number liquid bridges

Understanding Particle Accumulation Structures (PAS) in Thermocapillary Liquid Bridges

Particle accumulation structures (PAS) in liquid bridges are considered in a didactic approach. After reviewing the experimental results on PAS we explain PAS as a limit cycle of the particle motion in the frame of reference co-rotating with the hydrothermal wave. The limit cycles representing PAS are created by perturbations of the motion of perfect tracer particles. Therefore, the topology of...

Stability of Axisymmetric Liquid Bridges

We study stability of axisymmetric liquid bridges between two axisymmetric solid bodies in the absence of gravity under arbitrary asymmetric perturbations which are expanded into a set of angular Fourier modes. We determine the stability region boundary for every angular mode in case of both fixed and free contact lines. Application of this approach allows us to demonstrate existence of stable ...

Liquid Bridges between Contacting Balls

The problem studied is that of a rotationally symmetric liquid bridge between two contacting balls of equal radius, with the same contact angle with both balls, and in the absence of gravity. The bridge surface must be of constant mean curvature, hence a Delaunay surface. If the contact angle is less than π 2 , existence of a rotationally symmetric bridge is shown for a large range of the relev...

Experiments with Liquid Bridges in Simulated Microgravity

A feature of stability diagrams of liquid bridges between unequal disks subjected to small axial gravity forces is that, for each separation of disks, there is a value of microgravity for which an absolute minimum volume limit is reached. The dependence of such microgravity values on the liquid bridge geometry has been experimentally checked by using the neutral buoyancy technique, experimental...

Lattice Boltzmann simulations of particle-laden liquid bridges: Effects of volume fraction and wettability