air content in cfx post processing

zandi · December 22, 2012, 16:28

Hi all,
can anyone help me with finding the amount of air content or concentration in fluid?! in post processing part .
thanks friends

ghorrocks · December 23, 2012, 05:39

Do you mean mixed at a micro-scale (ie bubbles)? Then you can see it as the air volume fraction in a multiphase simulation.

Do you mixed at a molecular level (ie air dissolved in water)? Then you can see it as the air mass fraction in a multi-component simulation, or possibly as an additional variable for a simpler approach.

zandi · December 23, 2012, 07:49

thank you very much Glenn, as always,
not mulecular, and maybe bubbly!
I ment in air entrainment like as self aeration in water jets, I need the concentration of air content in the water.
I hope I could clarify myself.
does CFX have such ability?
thanks again

ghorrocks · December 23, 2012, 17:28

If the air is in bubble then you have a multiphase model. And the air content will be the air volume fraction.

Yes, CFX has many multiphase models. It is just a matter of choosing the correct one for your application.

zandi · December 24, 2012, 02:17

thank you very much for useful advice

December 22, 2012, 16:28	air content in cfx post processing	#1
zandi Senior Member Fatema Zandi Goharrizi Join Date: Mar 2009 Posts: 158 Rep Power: 17	Hi all, can anyone help me with finding the amount of air content or concentration in fluid?! in post processing part . thanks friends

December 23, 2012, 17:28		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,852 Rep Power: 144	If the air is in bubble then you have a multiphase model. And the air content will be the air volume fraction. Yes, CFX has many multiphase models. It is just a matter of choosing the correct one for your application. zandi likes this.

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December 23, 2012, 05:39		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,852 Rep Power: 144	Do you mean mixed at a micro-scale (ie bubbles)? Then you can see it as the air volume fraction in a multiphase simulation. Do you mixed at a molecular level (ie air dissolved in water)? Then you can see it as the air mass fraction in a multi-component simulation, or possibly as an additional variable for a simpler approach.

December 23, 2012, 07:49		#3
zandi Senior Member Fatema Zandi Goharrizi Join Date: Mar 2009 Posts: 158 Rep Power: 17	thank you very much Glenn, as always, not mulecular, and maybe bubbly! I ment in air entrainment like as self aeration in water jets, I need the concentration of air content in the water. I hope I could clarify myself. does CFX have such ability? thanks again

December 24, 2012, 02:17		#5
zandi Senior Member Fatema Zandi Goharrizi Join Date: Mar 2009 Posts: 158 Rep Power: 17	thank you very much for useful advice