Initial Condition for expanding Air

hotti24 · October 24, 2018, 05:07

Hey fellows!

I would like to simulate a pressurised outlet stream of air. In the simulation I'll have some kind of a container filled with an overpressure of 2 bar air and I would like to simulate the airflow through an outlet nozzle. My problem is, that I cannot set the initial pressure just for the region where the container is located. It is no problem at all to set every cell to this pressure, but I have to visualise the flow behaviour outside of my nozzle where the pressure is 2 bar less.

Any suggestions?

Hendrik

tomf · October 25, 2018, 05:34

Hi,

Short answer with some hints.
I would suggest to search for setFields, or funkySetFields (from swak4Foam).

Regards,
Tom

hotti24 · October 25, 2018, 08:12

Thanks! That is exactly what I was looking for.

October 24, 2018, 05:07	Initial Condition for expanding Air	#1
hotti24 New Member Hendrik Join Date: Jul 2013 Location: Germany Posts: 9 Rep Power: 13	Hey fellows! I would like to simulate a pressurised outlet stream of air. In the simulation I'll have some kind of a container filled with an overpressure of 2 bar air and I would like to simulate the airflow through an outlet nozzle. My problem is, that I cannot set the initial pressure just for the region where the container is located. It is no problem at all to set every cell to this pressure, but I have to visualise the flow behaviour outside of my nozzle where the pressure is 2 bar less. Any suggestions? Hendrik

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October 25, 2018, 05:34		#2
tomf Senior Member Tom Fahner Join Date: Mar 2009 Location: Breda, Netherlands Posts: 646 Rep Power: 32	Hi, Short answer with some hints. I would suggest to search for setFields, or funkySetFields (from swak4Foam). Regards, Tom

October 25, 2018, 08:12		#3
hotti24 New Member Hendrik Join Date: Jul 2013 Location: Germany Posts: 9 Rep Power: 13	Thanks! That is exactly what I was looking for.