# How to calculate the gas slug length?

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 May 16, 2012, 08:29 How to calculate the gas slug length? #1 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.

 May 17, 2012, 08:37 #2 Member   Fer Villa Join Date: Apr 2012 Posts: 35 Rep Power: 6 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 New Member   Beann Carlos Join Date: Jul 2012 Posts: 17 Rep Power: 6 help me please, how you got the slug flow? what were your input parameters? and configuration of the model?

July 15, 2012, 00:05
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Beann Carlos
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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?

 July 17, 2012, 12:16 #5 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 New Member   Beann Carlos Join Date: Jul 2012 Posts: 17 Rep Power: 6 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 New Member   zainab Join Date: Mar 2012 Posts: 17 Rep Power: 6 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 New Member   Beann Carlos Join Date: Jul 2012 Posts: 17 Rep Power: 6 Greetings, and got the slug flow in horizontal pipelines, measurements? speeds? I think I can help.

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