Author(s)

K Adamiak, A Jaworek & A Krupa

Abstract

The paper presents a numerical algorithm to simulate the deposition of small dust particles on much larger liquid droplets distorted by the electric field. It involves three steps. First, the droplet distortion in the electric field is determined by balancing the capillary and electric forces (Laplace-Young equations). The electric force is proportional to the square of the electric field intensity and is calculated using the Boundary Element Method. In the second step, the gas flow velocity distribution around the droplet, with a shape as previously determined, is simulated. Finally, the particle trajectories are calculated by numerical integration of the equation resulting from the Newton equation of motion. Numerical results of the deposition efficiency are presented for different values of non-dimensional parameters governing the problem: the electrical Bond, the Stokes, the electrical Stokes and the Reynolds numbers. It has been shown, that the droplet elongation can seriously change the deposition efficiency for the dust particles.

Keywords