[Nek5000-users] Marangoni flow

[nek5000-users at lists.mcs.anl.gov]

Hi Frank,

the 3-fold mesh looks to be the best resolved -- What happens
if you increase N in the other cases?

Paul



On Fri, 16 Jul 2010, nek5000-users at lists.mcs.anl.gov wrote:

> On Thu, 2010-07-15 at 19:21 -0500, nek5000-users at lists.mcs.anl.gov
wrote:
> Hi Frank,
> 
> So the 4 and 5 symm. meshes yield correct, non-chaotic results,
> but the 3-fold symm. mesh gives a chaotic, and incorrect, result.
> 
> Is that a correct summary ?

Hi Paul,

Yes, that is what I'm seeing.

Cheers,
Frank

> 
> Thanks,
> 
> Paul
> 
> 
> On Fri, 16 Jul 2010, nek5000-users at lists.mcs.anl.gov wrote:
> 
> > On Thu, 2010-07-15 at 18:47 -0500, nek5000-users at lists.mcs.anl.gov
> wrote:
> > Hi Frank,
> > 
> > Does the chaotic behavior go away when you raise N ?
> 
> Hi Paul,
> 
> I have used N=6 and N=8 with that grid, with little difference in the
> results.  There are more elements (120) in the xy plane than for the m=4
> (48 elements in xy) mesh
> http://www.cct.lsu.edu/~fmuldoo/temp/m-4.png
> or for the m=5 (60 elements in xy) mesh
> http://www.cct.lsu.edu/~fmuldoo/temp/m-5.png
> 
> Cheers,
> Frank
> > 
> > Paul
> > 
> > On Thu, 15 Jul 2010, nek5000-users at lists.mcs.anl.gov wrote:
> > 
> > > Hello all,
> > 
> > At present we are working on understanding some rotating/traveling waves
> > that occur in a cylindrical geometry.  In particular, the effect of the
> > grid on the solution is of interest.  The results from the following
> > grid in the xy plane, (it is simply extruded in the z direction) exhibit
> > a somewhat unexpected (chaotic) behavior.  Would welcome any and all
> > comments concerning the quality of this mesh.
> > 
> > http://www.cct.lsu.edu/~fmuldoo/temp/m-3.png
> > 
> > P.S. The reason for looking at a mesh with m=3 symmetry is due to the
> > existence of either m=3 and m=4 rotating/traveling waves; meshes with
> > m=3 and m=5 symmetry have also been looked at and give identical (non
> > chaotic) results.
> > 
> > Cheers,
> > Frank
> > 
> > 
> > 
> > 
> > -- 
> > Frank Herbert Muldoon, Ph.D. Mechanical Engineering
> > Technische Universität Wien (Vienna Technical University)
> > Inst. f. Strömungsmechanik und Wärmeübertragung (Institute of Fluid
> > Mechanics and Heat Transfer)
> > Resselgasse 3
> > 1040 Wien
> > Tel: +4315880132232
> > Fax: +4315880132299 
> > Cell:+436765203470
> > fmuldoo (skype)
> > http://tetra.fluid.tuwien.ac.at/fmuldoo/public_html/webpage/frank-muldoon.html
> > 
> > _______________________________________________
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> > _______________________________________________ Nek5000-users mailing list Nek5000-users at lists.mcs.anl.gov https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users
> -- 
> Frank Herbert Muldoon, Ph.D. Mechanical Engineering
> Technische Universität Wien (Vienna Technical University)
> Inst. f. Strömungsmechanik und Wärmeübertragung (Institute of Fluid
> Mechanics and Heat Transfer)
> Resselgasse 3
> 1040 Wien
> Tel: +4315880132232
> Fax: +4315880132299 
> Cell:+436765203470
> fmuldoo (skype)
> http://tetra.fluid.tuwien.ac.at/fmuldoo/public_html/webpage/frank-muldoon.html
> 
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> _______________________________________________ Nek5000-users mailing list Nek5000-users at lists.mcs.anl.gov https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users
-- 
Frank Herbert Muldoon, Ph.D. Mechanical Engineering
Technische Universität Wien (Vienna Technical University)
Inst. f. Strömungsmechanik und Wärmeübertragung (Institute of Fluid
Mechanics and Heat Transfer)
Resselgasse 3
1040 Wien
Tel: +4315880132232
Fax: +4315880132299 
Cell:+436765203470
fmuldoo (skype)
http://tetra.fluid.tuwien.ac.at/fmuldoo/public_html/webpage/frank-muldoon.html

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