Aerosol coagulation in the plume from a cross-wind line source

Various numerical schemes for approximating advection, diffusion and aerosol coagulation have been tested for the plume from a cross-wind line aerosol source. On the basis of these tests, it is concluded that Fromm's method for advection and orthogonal collocation on finite elements for diffusion are among the best means currently available. For numerical simulation of coagulation in a plume from a cross-wind line source, cubic spline interpolation and quadrature are very accurate in conserving aerosol mass concentration. Also, the numerical results for coagulation provide proof of the capability of the method of fractional steps to simulate accurately aerosol coagulation and transport.