[Kevin88]

Trying to model high velocity flow (400m/s) through a pipe system in Fluent. Are there any specific models that should be turned on to aid convergence?
if not, can relaxation factors be tweaked in any way to help?

[Far]

Trying to model high velocity flow (400m/s) through a pipe system in Fluent. Are there any specific models that should be turned on to aid convergence?
if not, can relaxation factors be tweaked in any way to help?

use density based solver with hybrid initialisation and solution steering. In solution steering choose the min CLF = 0.1 (or lower) and max = 50 and choose the flow regime (transonic or supersonic)

[Kevin88]

Thanks for the reply Far. I was wondering what CLF stands for in the solution steering? I can't see anything that it might refer to.

Thanks again
Kevin

[Far]

min and max courant number

go to "more settings" and you find that option there.

https://www.sharcnet.ca/Software/Flu...ug/node840.htm

https://www.sharcnet.ca/Software/Flu...ug/node838.htm

[Kevin88]

Thanks Far. Much appreciated