# Arrows: about

## Plotting of arrows

Spatial vectorial quantities can be displayed by means of colored arrows on the different supports.

## Support

The support for the plotting of arrows are:

- unidirectional conductors
- bidirectional conductors
- 2D grids

## Spatial quantities

The spatial quantities that can be displayed by means of arrows are:

- the current density and its three components (X, Y or Z)
- the magnetic flux density and its three components (X, Y or Z)
- the Laplace force density (the average component as well as the 2ω pulsating component) and its three components (X, Y or Z)

## Meaning of the arrows

The spatial quantities considered are displayed by means of arrows according to the following rules:

- the color of the arrows is proportional to the modulus of the quantity
- the orientation of the arrows points the direction of this quantity*

## Computation points

The points where the arrows are computed depends on the spatial quantity selected but are in general highly linked to:

- for unidirectional conductors, to the mesh and the additional points due to the discretization in the length for the post-processing*
- for bidirectional conductors, to the mesh
- for 2D grids, to their own discretization as described in § 2D grids: about