version 4.2 authored by Udo Ziegler's avatar Udo Ziegler
......@@ -983,11 +983,10 @@ and *Δ*<sub>iz</sub> are given by
and (*Â*<sub>*x*</sub>, *Â*<sub>*y*</sub>, *Â*<sub>*z*</sub>)
are the cell-edge integrals
![ic_A](uploads/d7670a3203d0f3a1e2a9a759e69e2e77/ic_A.png)
![ic_A](uploads/d7670a3203d0f3a1e2a9a759e69e2e77/ic_A.png){width=300px}
The *Â*'s
The $\hat{A}$'s are usually easier to compute than the face-averaged
magnetic field components directly. Even if the $\hat{A}$'s are
The *Â*'s are usually easier to compute than the face-averaged
magnetic field components directly. Even if the *Â*'s are
approximated but otherwise set *unambiguously* on cell edges in the grid
hierarchy, the magnetic field derived from the above discrete curl of
vector potential has a divergence-free mesh representation.
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