Predicting Aerially Applied Particle Deposition by Computer

This paper is a status report on a NASA effort to develop a computer code capable of simulating the deposition of materials in the wake of fixed or rotary wing aircraft operating under realistic atmospheric conditions. The deposition code “Ag Disp” is novel in that the mean particle trajectory, as well as the variance from the mean resulting from fluid fluctuations are simultaneously predicted. Sample calculations are undertaken to demonstrate the versatility of this code.