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-   -   How to calculate the gas slug length? (http://www.cfd-online.com/Forums/fluent/101886-how-calculate-gas-slug-length.html)

How to calculate the gas slug length?

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 (Post 361410) 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?

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.

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