[RS@navier]

Hi,
I am simulating a spray injection through a concentric arrangement of fuel injector and air inlet. For this I am using a 2D axisymmetric domain represented by a rectangle and using the DPM model in Fluent to inject the fuel droplets from one of the vertices. The injector type selected is 'pressure-swirl atomizer'. The boundary conditions of the 4 sides of the rectangle are mass inlet, axis, outflow, wall.

I am facing a problem wherein no particles are being injected as it shows 0 particles tracked, 0 particles escaped . What could be the reason and how can I fix it?
Thank You