[FLASH-USERS] FLASH 4.0 and 2.5 d geometry

[Sean Couch]

Hi Phil,

FLASH4 has implemented support for 1.5D spherical and 2.5D cylindrical in the unsplit family of solvers.  Angular momentum should indeed be conserved.  Again, this is only implemented for the unsplit solvers so make sure to use +uhd or +usm in your setup line.

Cheers,
Sean


--------------------------------------------------------
Sean M. Couch, Ph.D.
Hubble Fellow
Flash Center for Computational Science
Department of Astronomy & Astrophysics
The University of Chicago
5747 S Ellis Ave, Jo 315
Chicago, IL  60637
(773) 702-3899
www.flash.uchicago.edu/~smc


On Sep 20, 2012, at 1:18 PM, Philip Chang <chang65 at uwm.edu> wrote:

> Hello,
> 
> I have previously used FLASH 3.1 and 3.2, but these versions didn't have 2.5 d properly implemented.  In particular, the v_phi component in a r-z (cylindrical) geometry didn't conserve angular momentum as it was being advected (along the r direction).  Has this been resolved in flash 4?  I wouldn't have thought so, but a quick glance at the flash 4 documentation reveals that the magnetic accretion torus test problem (which demands angular momentum conservation) to get the MRI or so I would think.
> 
> So has FLASH 4 implemented conservation of angular momentum for the v_phi component in cylindrical geometry? Or does it do it only for a limited number of solvers?
> 
> Thanks,
> Phil
> 

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