How to calculate the gas slug length?

mhsaadanym · May 16, 2012, 08:29

I am simulating two-phase (gas and liquid) flow in micromixer. I am using Fluent (VOF ethod). I already obtained the slug flow. I want to know how can I calculate the gas and liquid slug lengths usig UDF or anyother metod.

Thank you..

fevi84 · May 17, 2012, 08:37

I need to do something similar. I have to determine the position of the nose of Taylor bubble . I thought making a UDF for determine the maximum axial position where of the volume fraction of gas is zero, but I don't know how introduce it in FLuet.

If you know another form for determine the position of the nose of Taylor bubble, please help me

Mechaniker · July 15, 2012, 00:04

help me please, how you got the slug flow? what were your input parameters? and configuration of the model?

Mechaniker · July 15, 2012, 00:05

Quote:

Originally Posted by mhsaadanym

I am simulating two-phase (gas and liquid) flow in micromixer. I am using Fluent (VOF ethod). I already obtained the slug flow. I want to know how can I calculate the gas and liquid slug lengths usig UDF or anyother metod.

Thank you..

help me please, how you got the slug flow? what were your input parameters? and configuration of the model?

mhsaadanym · July 17, 2012, 12:16

Hi,

I solved unsteady gas-liquid flow in micromixer. The boundary conditions are inlet velocity for the two inlets and outlet flow at the outlet. The gas is the primary phase and the liquid is the secondary. I have pictures for the flow contour but i donot know how to send it to you.

Regards,

Mohamed

Mechaniker · July 17, 2012, 12:33

Thanked by your answer, this is my email, if you have any paper to guide me I would appreciate you let him go, I would like to know how did you see the flow patterns in fluent animations? which is the configuration of time-step tensai.s2000@gmail.com

zainab · July 27, 2012, 14:06

Hi
please, help me how do you get the slug shape or configuration, I working on slug flow in horizontal pipe, i cant get the true slug phases distribution.

Mechaniker · July 27, 2012, 15:51

Greetings, and got the slug flow in horizontal pipelines, measurements? speeds? I think I can help.

May 16, 2012, 08:29	How to calculate the gas slug length?	#1
mhsaadanym New Member mhsaadanym Join Date: May 2012 Posts: 2 Rep Power: 0	I am simulating two-phase (gas and liquid) flow in micromixer. I am using Fluent (VOF ethod). I already obtained the slug flow. I want to know how can I calculate the gas and liquid slug lengths usig UDF or anyother metod. Thank you.. Mechaniker likes this.

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May 17, 2012, 08:37		#2
fevi84 Member Fer Villa Join Date: Apr 2012 Posts: 35 Rep Power: 13	I need to do something similar. I have to determine the position of the nose of Taylor bubble . I thought making a UDF for determine the maximum axial position where of the volume fraction of gas is zero, but I don't know how introduce it in FLuet. If you know another form for determine the position of the nose of Taylor bubble, please help me

July 15, 2012, 00:04		#3
Mechaniker New Member Beann Carlos Join Date: Jul 2012 Posts: 17 Rep Power: 13	help me please, how you got the slug flow? what were your input parameters? and configuration of the model?

July 17, 2012, 12:16		#5
mhsaadanym New Member mhsaadanym Join Date: May 2012 Posts: 2 Rep Power: 0	Hi, I solved unsteady gas-liquid flow in micromixer. The boundary conditions are inlet velocity for the two inlets and outlet flow at the outlet. The gas is the primary phase and the liquid is the secondary. I have pictures for the flow contour but i donot know how to send it to you. Regards, Mohamed

July 17, 2012, 12:33		#6
Mechaniker New Member Beann Carlos Join Date: Jul 2012 Posts: 17 Rep Power: 13	Thanked by your answer, this is my email, if you have any paper to guide me I would appreciate you let him go, I would like to know how did you see the flow patterns in fluent animations? which is the configuration of time-step tensai.s2000@gmail.com

July 27, 2012, 14:06		#7
zainab New Member zainab Join Date: Mar 2012 Posts: 17 Rep Power: 14	Hi please, help me how do you get the slug shape or configuration, I working on slug flow in horizontal pipe, i cant get the true slug phases distribution.

July 27, 2012, 15:51		#8
Mechaniker New Member Beann Carlos Join Date: Jul 2012 Posts: 17 Rep Power: 13	Greetings, and got the slug flow in horizontal pipelines, measurements? speeds? I think I can help.