Evolution of high concentration particle diffusion and coagulation in planar jet flow

High concentration particles with ultrafine diameter (d_p,=100nm) diffusion and coagulation in planar jet flow were simulated. The initial particle volume fraction is 10%. The Large Eddy Simulation (LES) was adopted to calculate the flow field. The Taylor-series expansion method of moments (TEMOM) model was used to transform and close the particle General Dynamic Equation (GDE) which can simulate the particle evolution. The results show that particle number concentration decreases rapidly as particle sprayed into flow field. At the upstream, the main effect of jet flow is carrying particles to downstream, but at the downstream, the particle coagulation is more obvious, so we can find the maximum particle size here.