Learning Forum

[Vicky]

Dear Sirs,

I am trying to simulate a two-phase flow in a horizontal pipe (air + solid particles), coupling Fluent software with Rocky software. It started with good results, but When the particle is 1 meter away from the starting point, it started to give me this type of message:

Please can you help me solve the problem why the particles are re-entering the CFD domain?

Thank you.

 

[Rob]

What do the two domains look like? Overlap generally means you're trying to add a new particle where an old one is already present (it's a Rocky solver check). 

[Vicky]

Hello Rob,

It looks like this:

 

So, should I let the Software itself solve it? or is there something I can do?

 

Thank you.

 

 

[Rob]

Check the inlet region: can you get the particle flow rate into the domain through the area you've set? Remember there's a packing limit as DEM particles in Rocky occupy a finite volume. 

[Amirhossein Fardi]

What is your version of Ansys and Rocky ? I had same error in Version 2022.2 while everything ok in 2022.1

[Vicky]

Hello, my version of Rocky is 2022.1 too.

Regarding my mass flow rate, it is 0.00351kg/s and the pipe diameter is 30.5mm

[Amirhossein Fardi]

you have two diameter. pipe diameter and cfd domain diameter. check the length and diameter of both geometries and sure both size are same.