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version 4.2
authored
Sep 26, 2025
by
Udo Ziegler
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@@ -359,48 +359,26 @@ NIRVANA, `g` contains structural superblock information (grid dimension,
spatial coordinates, etc.) as well as holds data arrays for the
following physical variables:
`g->`
variable
----------------------- ----------------------------------------------------------------------
`rho[iz][iy][ix]`
mass density $
\v
arrho$
`mx[iz][iy][ix]`
$x$-momentum density $m_x$
`my[iz][iy][ix]`
$y$-momentum density $m_y$
`mz[iz][iy][ix]`
(canonical) $z$-momentum density $m_z$
`e[iz][iy][ix]`
total energy density $e$ (if energy equation)
`bx[iz][iy][ix]`
magnetic field component $B_x$ (if MHD)
`by[iz][iy][ix]`
magnetic field component $B_y$ (if MHD)
`bz[iz][iy][ix]`
magnetic field component $B_z$ (if MHD)
`phi[iz][iy][ix]`
gravitational potential $
\P
hi$ (if selfgravity)
`nX[is][iz][iy][ix]`
species number densities $n_{s}$ (if species)
`C[ic][iz][iy][ix]`
tracer variables $C_{c}$ (if tracer)
`tfx[it][iz][iy][ix]`
$x$-component ${b_x}_{t}$ of testfields fluctuations (if testfields)
`tfy[it][iz][iy][ix]`
$y$-component ${b_y}_{t}$ of testfields fluctuations (if testfields)
`tfz[it][iz][iy][ix]`
$z$-component ${b_z}_{t}$ of testfields fluctuations (if testfields)
`p[iz][iy][ix]`
thermal pressure $p$
`T[iz][iy][ix]`
temperature $T$
`et[iz][iy][ix]`
thermal energy density $
\e
psilon$ (if dual energy mode)
`ne[iz][iy][ix]`
electron number density $n_e$
|
`g->`
| variable |
|:----------------------|:-----------------------------------------------------------------------------------------|
|
`rho[iz][iy][ix]`
| mass density $
\r
ho$ |
|
`mx[iz][iy][ix]`
| $x$-momentum density $m_x$ |
|
`my[iz][iy][ix]`
| $y$-momentum density $m_y$ |
|
`mz[iz][iy][ix]`
| (canonical) $z$-momentum density $m_z$ |
|
`e[iz][iy][ix]`
| total energy density $e$ (if energy equation) |
|
`bx[iz][iy][ix]`
| magnetic field component $B_x$ (if MHD) |
|
`by[iz][iy][ix]`
| magnetic field component $B_y$ (if MHD) |
|
`bz[iz][iy][ix]`
| magnetic field component $B_z$ (if MHD) |
|
`phi[iz][iy][ix]`
| gravitational potential $
\P
hi$ (if selfgravity) |
|
`nX[is][iz][iy][ix]`
| species number densities $n_s$ (if species) |
|
`C[ic][iz][iy][ix]`
| tracer variables $C_c$ (if tracer) |
|
`tfx[it][iz][iy][ix]`
| $x$-component
*b*
<sub>
*x*
</sub><sub>
*t*
</sub>
of testfields fluctuations (if testfields) |
|
`tfy[it][iz][iy][ix]`
| $y$-component
*b*
<sub>
*y*
</sub><sub>
*t*
</sub>
of testfields fluctuations (if testfields) |
|
`tfz[it][iz][iy][ix]`
| $z$-component
*b*
<sub>
*z*
</sub><sub>
*t*
</sub>
of testfields fluctuations (if testfields) |
|
`p[iz][iy][ix]`
| thermal pressure $p$ |
|
`T[iz][iy][ix]`
| temperature $T$ |
|
`et[iz][iy][ix]`
| thermal energy density $
\e
psilon$ (if dual energy mode) |
|
`ne[iz][iy][ix]`
| electron number density $n_e$ |
|
`rho[iz][iy][ix]`
| mass density 𝜚 |
|
`mx[iz][iy][ix]`
|
*x*
-momentum density
*m*
<sub>
*x*
</sub>
|
|
`my[iz][iy][ix]`
|
*y*
-momentum density
*m*
<sub>
*y*
</sub>
|
|
`mz[iz][iy][ix]`
| (canonical)
*z*
-momentum density
*m*
<sub>
*z*
</sub>
|
|
`e[iz][iy][ix]`
| total energy density
*e*
(if energy equation) |
|
`bx[iz][iy][ix]`
| magnetic field component
*B*
<sub>
*x*
</sub>
(if MHD) |
|
`by[iz][iy][ix]`
| magnetic field component
*B*
<sub>
*y*
</sub>
(if MHD) |
|
`bz[iz][iy][ix]`
| magnetic field component
*B*
<sub>
*z*
</sub>
(if MHD) |
|
`phi[iz][iy][ix]`
| gravitational potential
*Φ*
(if selfgravity) |
|
`nX[is][iz][iy][ix]`
| species number densities
*n*
<sub>
*s*
</sub>
(if species) |
|
`C[ic][iz][iy][ix]`
| tracer variables
*C*
<sub>
*c*
</sub>
(if tracer) |
|
`tfx[it][iz][iy][ix]`
|
*x*
-component
*b*
<sub>
*x*
</sub><sub>
*t*
</sub>
of testfields fluctuations (if testfields) |
|
`tfy[it][iz][iy][ix]`
|
*y*
-component
*b*
<sub>
*y*
</sub><sub>
*t*
</sub>
of testfields fluctuations (if testfields) |
|
`tfz[it][iz][iy][ix]`
|
*z*
-component
*b*
<sub>
*z*
</sub><sub>
*t*
</sub>
of testfields fluctuations (if testfields) |
|
`p[iz][iy][ix]`
| thermal pressure
*p*
|
|
`T[iz][iy][ix]`
| temperature
*T*
|
|
`et[iz][iy][ix]`
| thermal energy density
*ε*
(if dual energy mode) |
|
`ne[iz][iy][ix]`
| electron number density
*n*
<sub>
*e*
</sub>
|
| index | meaning | range |
|:------|:-----------------------------------------|:----------------------|
|
`ix`
| grid-index in $x$-direction | 0...
`g->nx`
|
...
...
...
...
