Purge helium in a pre-filled hydrogen tube in Ansys fluent (version 2019 r3)

chun9321md · April 19, 2020, 10:50

Hi,

I am doing a study that purging helium in a pre-filled hydrogen tube. How can i set that up in Ansys?

MKuhn · April 20, 2020, 02:05

Please read the section "Multiphase Model" in the manual first.

vinerm · April 20, 2020, 05:27

Are both in same phase, either gaseous or liquid? If yes, then all you need is to set up Species Transport, of course, without any reactions. Initialize with Hydrogen mass fraction of 1 and mass fraction of Helium as 1 at the inlet. Run it as transient.

chun9321md · April 21, 2020, 12:41

How about the helium and the hydrogen with different velocity?

vinerm · April 21, 2020, 13:16

If you have two inlets, then, of course, you can set different velocities. As far as the field within the domain is concerned, Fluent does it based on first principles. So, if those are supposed to be flowing at different velocities, then you will observe that. However, gases reach same velocity quite fast.

April 19, 2020, 10:50	Purge helium in a pre-filled hydrogen tube in Ansys fluent (version 2019 r3)	#1
chun9321md New Member Tim Yick Join Date: Apr 2020 Posts: 3 Rep Power: 5	Hi, I am doing a study that purging helium in a pre-filled hydrogen tube. How can i set that up in Ansys?

April 20, 2020, 05:27	Phase	#3
vinerm Senior Member Vinerm Join Date: Jun 2009 Location: Nederland Posts: 2,946 Blog Entries: 1 Rep Power: 35	Are both in same phase, either gaseous or liquid? If yes, then all you need is to set up Species Transport, of course, without any reactions. Initialize with Hydrogen mass fraction of 1 and mass fraction of Helium as 1 at the inlet. Run it as transient. __________________ Regards, Vinerm PM to be used if and only if you do not want something to be shared publicly. PM is considered to be of the least priority.

April 21, 2020, 13:16	Gases	#5
vinerm Senior Member Vinerm Join Date: Jun 2009 Location: Nederland Posts: 2,946 Blog Entries: 1 Rep Power: 35	If you have two inlets, then, of course, you can set different velocities. As far as the field within the domain is concerned, Fluent does it based on first principles. So, if those are supposed to be flowing at different velocities, then you will observe that. However, gases reach same velocity quite fast. __________________ Regards, Vinerm PM to be used if and only if you do not want something to be shared publicly. PM is considered to be of the least priority.

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April 20, 2020, 02:05		#2
MKuhn Senior Member Moritz Kuhn Join Date: Apr 2010 Location: Germany, Dresden Posts: 207 Rep Power: 16	Please read the section "Multiphase Model" in the manual first.

April 21, 2020, 12:41		#4
chun9321md New Member Tim Yick Join Date: Apr 2020 Posts: 3 Rep Power: 5	How about the helium and the hydrogen with different velocity?