[Eleven Leo]

Hi,

I want to inject some liquid/gas mixture in my simulation. Is it possible to make it in Converge, using an inlet boundary or other setups?
If an in-let boundary can work, how to inject both liquid and gas?
Any answer, link, or reference is thankful.

Best regards,
Yaopeng

[rvigneshwar]

Hi Yaopeng Li,

Yes, you can provide liquid+gas inlet BC. You first need to add the liquid and gas species to species. in. Then in the boundary.in you will be able to provide respective inflow BC and in "species BC" column you can add the gas and liquid species with the respective mass fraction. Hope this helps, let us know if you need further clarifications or additional support.

[Eleven Leo]

Originally Posted by rvigneshwar

Hi Yaopeng Li,

Yes, you can provide liquid+gas inlet BC. You first need to add the liquid and gas species to species. in. Then in the boundary.in you will be able to provide respective inflow BC and in "species BC" column you can add the gas and liquid species with the respective mass fraction. Hope this helps, let us know if you need further clarifications or additional support.

Hi Vigneshwar

Thank you very much for your kind help. I will try the setup according to your instruction.

Best wishes
Yaopeng

[Eleven Leo]

Hi Vigneshwar

When I use the inflow boundary, it shows a warning that "Length scale is greater than 20% of Hydraulic Diameter". What does it mean?
Thank you very much for your answer.

Best wishes
Yaopeng

Originally Posted by rvigneshwar

Hi Yaopeng Li,

Yes, you can provide liquid+gas inlet BC. You first need to add the liquid and gas species to species. in. Then in the boundary.in you will be able to provide respective inflow BC and in "species BC" column you can add the gas and liquid species with the respective mass fraction. Hope this helps, let us know if you need further clarifications or additional support.

[rvigneshwar]

Originally Posted by Eleven Leo

Hi Vigneshwar

When I use the inflow boundary, it shows a warning that "Length scale is greater than 20% of Hydraulic Diameter". What does it mean?
Thank you very much for your answer.

Best wishes
Yaopeng

Hi Yaopeng Li,

The studio warning is referring to the turbulence dissipation value provided at inflow BC. The warning is just based on general recommendations - relation between eps and inflow Hydraulic Diameter. You should still be able to run without any issues even with the waning, Generally, this warning shows up when a small inflow area is used.

[Eleven Leo]

Hi Vigneshwar,

Thank you very much for your answer, again.

Best wishes
Yaopeng

Originally Posted by rvigneshwar

Hi Yaopeng Li,

The studio warning is referring to the turbulence dissipation value provided at inflow BC. The warning is just based on general recommendations - relation between eps and inflow Hydraulic Diameter. You should still be able to run without any issues even with the waning, Generally, this warning shows up when a small inflow area is used.