Abstract
A method for calculating the coefficient of capture of small (dust) particles by a drop that allows one to take into account the influence of the surface tension and the hydrodynamic resistance of a particle being immersed in a drop is proposed. The dependence of the critical particle velocity necessary to overcome the surface tension forces and the pressure resistance on the governing parameters is found. The existence of a critical Stokes number limiting the region of particle capture is demonstrated. The calculated dependences of the coefficient of capture on the Stokes number are compared with the experimental data. It is found that in comparison with the conventional method, the relation obtained using the proposed method is in better agreement with the experimental data.