ejector 3D
 

Attachment 26229Hi my friends

I'm working on ejector 3d.I had some questions.please help me.

1.The ejector is s.s or u.ss.if it's uss.what number do I consider for time step size?

2.Air is ideal gas or has canstant density?

3.what kind of mesh do I have to use? I used hex and tet.

I consider symmetry 3d.but it doesn't converge. I have attached the geometry file

salam agha mehdi
ahle kojayi?
etefaghan manam daram model mikonam ejector liquid gas
khob midoni ghatan bedon ke nemitoni density ro sabet begiri chon motagheyere dar navahie mokhtalefe ejector
man fek mikonam ss bashe
sharayete marzit chie?

Guys,
Maybe we'll discuss it in English. I have almost the same task, but I have water and methane in Jet Compressor.

Gas Ejector
 

Hi

I am also performaing CFD in CFX for gas ejector. the flow after primary nozzle is not symmetric into secondary nozzle, the eccentric flow restricts flow from one end please see pic.

Any help is highly appreciated.

Thank you

Hi!

I don't see any problem here. The asymmetry of gas flow calls "Koand's Effect".