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-   -   streamline plot for multiphase problem (https://www.cfd-online.com/Forums/openfoam-post-processing/85966-streamline-plot-multiphase-problem.html)

 lionlove0903 March 10, 2011 12:04

streamline plot for multiphase problem

hello everyone,

I can't plot the proper streamline after I got the solution from interFoam with vof method. And I am using paraFoam and tecplot360. The problem is I want to plot the streamline in the liquid phase, but the softwares give out the streamline in the whole computational area.

this is the streamline I get in the tecplot360:
http://img6.imageshack.us/img6/7459/snap1ve.jpg

This is a picture in a published paper, and the author says he use the vof, too.
http://img233.imageshack.us/img233/9084/snap2o.jpg

Can anyone tell me how to remove the gas phase and get the streamline like the second picture?

Thanks!

 akidess March 10, 2011 14:02

You can filter the streamlines from the second face e.g. using the threshold filter with alpha before the streamline filter, but that will not give you the same image. The velocity field in both results is fundamentally different. OpenFOAM's VOF algorithm solves a mixture momentum equation and thus gives you one velocity field that applies to both phases (the mixture), whereas I guess your literature result solves a coupled set of momentum equations (one for each phase).

 nimasam March 14, 2011 16:25

stream function iso line

1 Attachment(s)
i want to compare my result from InterFOAM with a literature which use a level set method and a mixture transport equation,