[fengjq]

Hello,

I was running sonicFoam for a de Laval nozzle that has a throat radius around 0.2mm, and could not get it going (crashed right away). Then, I increased the scale such that the throat radius became 2cm, and it ran fine. Is there somewhere I can set for the sonicFoam solver such that it's independent of the length scale of my mesh? Thanks.

[fengjq]

Originally Posted by fengjq

Hello,

I was running sonicFoam for a de Laval nozzle that has a throat radius around 0.2mm, and could not get it going (crashed right away). Then, I increased the scale such that the throat radius became 2cm, and it ran fine. Is there somewhere I can set for the sonicFoam solver such that it's independent of the length scale of my mesh? Thanks.

Out of curiosity, I turned off the turbulence model and had successful run for the case of 0.2mm throat radius. So, I guess the length scale dependence must come from the turbulence BC such as the value of epsilon at inlet, etc.