[FLASH-USERS] 2.5D split hydro & centrifugal force

[Sean Couch]

Hi Mateusz,

This is something that is not implemented in the release version of FLASH, but I am aware of a few users that have implemented 2.5D cylindrical coordinates in their own versions.  It involves adding an advected angular momentum mass scalar that is used to compute the phi-velocity and centrifugal forces.  

Maybe a FLASH user with experience implementing this can chime in and give more details?

Cheers,
Sean


--------------------------------------------------------
Sean M. Couch
Hubble Fellow
Flash Center for Computational Science
Department of Astronomy & Astrophysics
University of Chicago
5747 S. Ellis Ave., Jo 315
Chicago, IL, 60637
773-702-3899 (office)





On Aug 10, 2011, at 10:02 AM, Mateusz Ruszkowski wrote:

> 
> 
> 
>   Hi all,
> 
> Does FLASH support 2.5D split hydro including a centrifugal force term? The users' manual clearly explains that 2D cylindrical support is available, and that the missing phi-coordinate implies that the solution is integrated around the symmetry axis (z-axis; all variables are independent of the phi-coordinate). But can one compute the velocity in the phi-direction v_phi, in addition to v_r and v_z, to account for the centrifugal forces in a system rotating around the z-axis? (obviously, such-defined v_phi would be independent of phi as the system is two-dimensional). Or is this something that still needs to be implemented?
> 
>   Thanks,
>     Mateusz