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Can any of the openfoam CFD solver be used for nano-scale geometry modelling?

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Old   April 27, 2012, 01:29
Default Can any of the openfoam CFD solver be used for nano-scale geometry modelling?
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Chen Xiaobing
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For the nano-scale flow, e.g., water, can CFD still be valid? The geometry scale is 100 nm.

I just tried, the CFD solvers in openfoam just gave random/unreasonable flow pattern results and it seems un-converged.

Thanks.
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Old   April 27, 2012, 03:09
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Matthias Voß
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Check for the Knudsen number Kn. I suppose you are out of range for continuum mechanics. But strange results often appear because of bad bc.

Good luck!

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Old   April 27, 2012, 05:03
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u said it. thanks!!!!!!!!
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Old   April 28, 2012, 02:14
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Alberto Passalacqua
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For high-Knudsen number flows in nanochannels you can use DSMC or MD solvers, which OpenFOAM provides. If you need a continuum treatment, you might want to consider alternative approaches like moment methods or Lattice-Boltzmann.

Best,
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