... The first term on the right-hand side represents the rate of formation of particles of volume v due to coagulation, and the second term that rate of loss of particles of volume v by coagulation ... of operation of an impactor Collection efficiency of one stage of an impactor as a function of Stokes number, Stk, Reynolds number, Re, and geometric ratios a particle and air at the outlet of ... Design and Evaluation of a New Low-Pressure Impactor Environmental Science & Technology, 13, 184–188 Kousaka, Y., Okuyama, K., Adachi, M (1985) Determination of Particle Size Distribution of Ultra-Fine...