The effect of Brownian diffusion as well as finite volume fraction of suspended particulate matter on axially symmetrical jet mixing of incompressible dusty fluid has been studied. Assuming the velocity and temperature in the jet to differ only slightly from that of the surrounding stream, a perturbation method has been employed to linearize the basic equations. The linearized boundary layer equations have been solved by using Hankel transform technique and Crank- Nicolson finite difference technique. Numerical computations have been made to discuss the profiles of velocity and temperature of the fluid and particle. It is observed that the consideration of Brownian diffusion helps in migration of particles through a longer distance and decreases the magnitude of velocity of the particles considerably which helps in the settling of suspended particulate matter.

particulate suspension, boundary layer characteristics, volume fraction, diffusion, incompressible fluid.