Reply To: Stability and Convergence of 3D Ejector Simulations

[Rob]

If it's only Mach 2 or so I'd use PBCS over the Density based solver, the latter is for really fast or very tightly coupled flow systems. 

You may also need more mesh in the core, but I can't tell from the images:  we have zoom for a reason! I'd also review how much of the upstream domain you really need: what do you gain from including so much of the high & low pressure region? 

As an aside, ejectors (also called jet pumps) are anything but easy to get working well. They are very simple, but that doesn't mean it's easy! There's decades of research into them as the various flow pressures & dimensions are fairly critical. 

Another aside, I always find decimal inches to be highly amusing. I'm English, and even we use metric, well, most of the time........