Dynamic Particle Accumulation Structure (PAS) due to Thermocapillary Effect in Half-Zone Liquid Bridge - Effect of temperature gradient on free surface due to volume ratio

摘要

We focus on the dynamic particle accumulation structure (PAS) due to thermocapillary effect in a half-zone liquid bridge. Effect of volume ratio of liquid bridge upon shape of the PAS itself and motion of particle on the PAS were discussed in the present study by tracking of particle in liquid bridge and by measuring of temperature on the free surface. It is found that the variation of the volume ratio leads a significant variation of the temperature gradient on the free surface, which results in difference of the shape of the PAS. The variation of the PAS shape is mainly explained by drastic change of the axial velocity of the particle and less change of its azimuthal velocity near the free surface.