Re: [sparta-users] Fw: z dimension question

[Steve P. <sj...@gm...>]

This is explained in Section 6.1 of the manual:


   - Using the create box
<https://sparta.sandia.gov/doc/create_box.html> command,
   set the z boundaries of the box to values that straddle the z = 0.0 plane.
   I.e. zlo < 0.0 and zhi > 0.0. Typical values are -0.5 and 0.5, but
   regardless of the actual values, SPARTA computes the "volume" of 2d grid
   cells as if their z-dimension length is 1.0, in whatever units
   <https://sparta.sandia.gov/doc/units.html> are defined. This volume is
   used with the global nrho
<https://sparta.sandia.gov/doc/global.html> setting
   to calculate numbers of particles to create or insert. It is also used to
   compute collision frequencies.

So, no, the zlo/zhi values you specify make no difference, so long as they
bracket 0.0.

Steve

On Fri, Nov 2, 2018 at 10:09 AM Runco, John J Capt USAF AETC AFIT/ENY <
Joh...@af...> wrote:

> Hey Steve,
>
>
> As promised from my previous email I sent a few minutes ago.
>
>
> ________________________________
> From: Runco, John J Capt USAF AETC AFIT/ENY
> Sent: Thursday, November 1, 2018 11:36 AM
> To: spa...@li...
> Subject: z dimension question
>
>
> Would reducing the z dimension to the size of the x and y-distance for a
> cell improve accuracy/decrease computational time for a 2d axisymmetric run
> for flow over a spherical nose cone?
>
>
>