Abstract
A study of leeward deposition of moving aerosols on cylinders was conducted by exposing glass rods of various dimensions to aerosols in a wind tunnel. Particles of several size ranges were carried to the target at three different wind velocities. For each exposure, the ratio, N L/N W, between the number of particles counted on the leeward side of the cylinder and the number counted over an equal area on the windward side was calculated, as was the impaction parameter, K, corresponding to the mean particle size. For K > 0.18, N L/N W = 0; for K < 0.085, 1.7% < N L/N W < 131%; and for 0.085 < K < 0.18, 0.3% < N L/N W < 1.7%. When K < 0.085, N L/N W did not vary with particle size, wind velocity, or cylinder diameter. However, when K < 0.085, the ratio did vary, generally showing an increase with decreasing particle size and wind velocity but with increasing cylinder size.