[David Artemyev]

Who could help me with set up of initial boundary conditions for an ejector in ANSYS CFX?

I am trying to wet the following:

1. Primary nozzle (Boundary type - inlet):

- Total pressure (stable) = 200 kPa, where reference pressure is 100 kPa;
- Static temperature is 280 K;

2. Secondary nozzle (Boundary type - inlet):

- Normal speed is 0.3 m/s;
- Static temperature is 280 K;

3. Diffuser ((Boundary type - outlet):

- Average static pressure is 90 kPa;

The results (https://drive.google.com/file/d/1vIR...ew?usp=sharing) show that there is a pressure rate less than the pressure in the secondary nozzle inlet what is absolutaly incorrect. I would be pleased if you point me on correct boundary set up. Somewhere I read that the secondary nozzle must be set as opening boundary type but when I try it the primary flow comes in both directions. Thank you for your help in advance!

[ghorrocks]

FAQ: https://www.cfd-online.com/Wiki/Ansy..._inaccurate.3F

I do not know what you are modelling or what the boundary conditions are representing so cannot help you. I also do not know what you mean by "there is a pressure rate less than the pressure in the secondary nozzle inlet".

[David Artemyev]

[QUOTE=ghorrocks;831273]FAQ: https://www.cfd-online.com/Wiki/Ansy..._inaccurate.3F

Dear user,

Please see the link to the file:

https://drive.google.com/file/d/1AeT...ew?usp=sharing

If you have any other questions, do not hesitate to ask me.

[ghorrocks]

I do not have time to look at your files. Please do not post to third party download sites, and post images directly on the forum (see https://www.cfd-online.com/Wiki/Ansy...n_the_forum.3F for how to do this)