I’ve been trying to simulate the flow inside and outside of a ramjet recently. The flow speed must be Mach 1.4, or 480m/s, at 100000pa. I’ve been having troubles obtaining results which made sense, and so decided to create a new project and ask for help here.
How should I set up the boundary conditions for this? Would a velocity inlet and a pressure outlet work fine?
I’ve tried doing this in the past, and got results which made no sense, such as negative temperatures (in kelvin) and pressures of -5e8 pa inside the inlet (which is supposed to compress air).
Below is a link to my current project, which I hope someone here can give advice on how to setup: