[FLASH-USERS] Mach number evolution with time

[Robert Fisher]

Hi Kezman :

  You can extract it from the global information in the flash.dat file. The
writing of the integral quantities are handled in
IO_writeIntegralQuantities. You can combine the global kinetic energy
(sixth column) with the global mass (first column) to determine the 3D RMS
velocity. This 3D RMS velocity, normalized to the sound speed (set by the
runtime parameter c_ambient, which defaults to 1) determines the 3D RMS
Mach number.

  You should find that it takes ~ 3 large-scale eddy turnover times to
drive to an approximate steady state. The default driving parameters are
derived from a large-scale run which was published in several papers,
including here :

http://adsabs.harvard.edu/abs/2010JFM...653..221B

  Best wishes,

  Bob

On Fri, Mar 24, 2017 at 8:26 AM, Kezman Saboi <ksaboi at asu.edu> wrote:

> Dear Flash-users,
>
> I recently ran a StirTurb problem. Could anyone briefly explain to me
> where I would get information about the evolution of the mach number with
> time. Is it from the .log file?
>
> Thank you,
>
> Kezman
>



-- 
Dr. Robert Fisher
Associate Professor / Graduate Program Director
University of Massachusetts/Dartmouth
Department of Physics
285 Old Westport Road
North Dartmouth, Massachusetts 02747
robert.fisher at umassd.edu
http://www.novastella.org
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