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Re: Glitches around cylinder boundary layer

OpenLB – Open Source Lattice Boltzmann Code › Forums › on Lattice Boltzmann Methods › General Topics › Glitches around cylinder boundary layer › Re: Glitches around cylinder boundary layer

July 26, 2018 at 11:36 am #2902
Eric
Participant

Hi Marc,

Thanks for your reply.

However, the bounce-back condition doesn’t seems to work. Are these strips around the cylinder reasonable in simulation? I mean, how do these strips and glitches arise in the vorticity contour?

I tried SmagorinskyBGK and SmagorinskyMRT as well. It seems these glitches can be tuned somewhat by adjusting Cs but they cannot be fully diminished. Also, at very high Re (50,000 in this case), there are upstream vortex formed in front of the cylinder, as can be show in the following plot:
[img]https://imgur.com/a/WSpVwEs[/img]

Best regards,
Eric