On plane laminar two-phase jet flow with full expansion

Laminar mixing of a two-dimensional jet of particulate suspension in an incompressible carrier fluid with a free stream moving in direction of the jet axis has been considered. The basic equations are of the boundary layer type and include the diffusion equation for the solid particles. The governing equations have been linearized by employing perturbation method and they have been solved by finite difference technique. It is found that the effect of increase in the parameter K, which is the ratio between the Reynolds number of the fluid flow and the particle relaxation parameter, is to quicken the attainment of the particle velocity to that of the carrier fluid. The parameter epsilon, the ratio of particle diffusion coefficient and the kinematic viscosity of the carrier fluid, has both damping and spreading effects on the jet. The effect of increasing the concentration of dust particles is to widen the mixing region. It is also found that the migration of the finer particles away from the jet axis is greater than that of the coarse particles.