[RedAdmiral]

Hello

Currently I'm using cfd to determine the efficiency of a liquid-solid phase separator.

The software uses a lagrangian particle tracking model.

I have one main question:

1. In the book "cfd for engineers" it's mentioned that the particles have to be much smaller then the fluid phase grid cells. Are there any guidelines in choosing the right mesh size? The particle sizes I use range from Ø50 µm to 400 µm.

And are there any other important subjects that you need to consider when using this kind of particle tracking model?




At the moment my results are quite odd, I could use tips.


Thankss

[bouloumag]

Originally Posted by RedAdmiral

Hello

Currently I'm using cfd to determine the efficiency of a liquid-solid phase separator.

The software uses a lagrangian particle tracking model.

I have one main question:

1. In the book "cfd for engineers" it's mentioned that the particles have to be much smaller then the fluid phase grid cells. Are there any guidelines in choosing the right mesh size? The particle sizes I use range from Ø50 µm to 400 µm.

And are there any other important subjects that you need to consider when using this kind of particle tracking model?




At the moment my results are quite odd, I could use tips.


Thankss

Langrangian stochastic models are used frequently in atmospheric science for plume modeling. You might want to look at what they do. A good place to start is

Rodean, Howard C., 1996: Stochastic Lagrangian Models of Turbulent Diffusion. Meteorological Monographs, 26, 1–84.
doi: http://dx.doi.org/10.1175/0065-9401-26.48.1

and

http://faculty.eas.ualberta.ca/jdwil..._bls_blm96.pdf

and look on google scholar who cite them.

[RedAdmiral]

I will take a look at your information tomorrow