[FLASH-USERS] Mass scalar question

[Dean Townsley]

Hi William,

Just to supplement what John Zuhone said...

The advection equation for mass scalers is given in the flash user's 
guide here:
http://flash.uchicago.edu/website/codesupport/flash3_ug_3p2/node20.html#eq:massscalar
by equation 13.9.  Basically it is just as John said, but this might be 
a bit more clear.

Cheers,
Dean

William Gray wrote:
> Hello FLASH users,
>
> I have a hopefully simple question. I am wondering what is the correct method of defining a mass scalar. If I have a quantity Z (in my case I am using this to track metals) that I have defined as a mass scalar. Should it be defined as Z = Z_wanted*density or as Z = Z_wanted?  I am interested in this because I want to make sure that this quantity is advected correctly.
>
>
> Thanks for your help,
>
> William Gray
> PhD Candidate, Astrophysics
> Arizona State University
>
>