Paper presented to the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 14-16 July 2014.
This paper reports on the collision interaction between a
confined liquid film (water) and an impacting hydrophilic glass
particle of different diameters (1.1-2mm) and impact velocities
(0.2-1 m/s). Depending on the impact Weber number (1.4-23.9)
of the particles either complete capture of the particle inside the
film or complete penetration through the film were observed. In
the latter case a certain amount of liquid mass was found to
adhere to the particle surface which again depended on the
impact Weber number. A criterion was developed based on the
energy balance approach to demarcate between these two
regimes. Also, an analytical model was proposed to
approximately determine the liquid mass attached to the
particle. Computationally, a three dimensional CFD model was
developed using the VOF approach and dynamic meshing
technique which was found to be in good agreement with the
experimentally observed dynamics in these two regimes.
