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Kelvin-Helmholtz and Rayleight-Taylor Instability

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Old   April 27, 2015, 07:39
Default Kelvin-Helmholtz and Rayleight-Taylor Instability
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Tobias Holzmann
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Dear Foamer,

as a fun project I simulated the Kelvin-Helmholtz and Rayleight-Taylor Instability during the weekend. Its nothing special but the results can be seen here:

Phenomena: Kelvin-Helmholtz Instability
https://www.youtube.com/watch?v=Nx4boZ2c974

Phenomena: Rayleight-Taylor Instability
https://www.youtube.com/watch?v=Pfo8pGkIOV4

Maybe I will prepare the FOAM files and upload it as a tutorial-case.
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Last edited by Tobi; April 27, 2015 at 10:26.
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Old   April 27, 2015, 16:47
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Very cool! What did you use to render the animations if you don't mind me asking? Paraview with some low opacity STL's to represent the solid geometries?

Cheers!
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Old   April 27, 2015, 16:50
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Hey,

thanks for the feedback. Yes it was paraview and exactly what you mentioned.
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Old   March 29, 2017, 05:45
Default Amazing~
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Hello, I am looking for a suitable case for KH-instability and find your amazing case in YouTube. Could you please send me your code for my noncommercial use? Thanks very much!
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Old   March 29, 2017, 07:41
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Are your labels correct in case of the Rayleigh-Taylor instability? Typically, the denser fluid is on top (otherwise the interface should be stable).
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Old   March 29, 2017, 07:46
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Hi Anton,

you are right, I made a label mistake and in the comment below it is already mentioned. I added the mistake to the description now. Thanks for your reply.
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Old   June 29, 2017, 09:55
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Hi Tobias,

May I ask which solver(s) did you use for Kelvin-Helmholtz case? also is the case is available at your website?

Best regards.
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Old   July 25, 2017, 03:57
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Hi,

I was using an own solver based on
  • pimpleDyMFoam
  • pimpleFoam
I am not sure right now because it is a long time ago but I guess it was something like that. A mixture model with a passive scalar to distinguish between salt water and normal water and then make the density, viscosity based on that scalar.
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Old   July 25, 2017, 09:22
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Quote:
Originally Posted by Tobi View Post
Hi,

I was using an own solver based on
  • pimpleDyMFoam
  • pimpleFoam
I am not sure right now because it is a long time ago but I guess it was something like that. A mixture model with a passive scalar to distinguish between salt water and normal water and then make the density, viscosity based on that scalar.
Thanks for the information.
Is this solver or case files available somewhere online?
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Old   July 25, 2017, 09:46
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Sorry I was missing that.
No.
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