Arrow Positioning
Under Arrow Positioning, first select a Placement of the arrows: Gauss points, Mesh nodes, and, for Arrow Volume plots in 3D and Arrow Surface plots in 2D, Grid. For Arrow Surface plots in 3D and Arrow Line plots on edges in 2D and 3D, and plots of principal stresses and strains on surfaces you can further choose Mesh elements, Uniform, or Uniform anisotropic.
Select Gauss points to position the arrows in the elements’ Gauss points when a solution is available. For Arrow Volume plots in 3D and Arrow Surface plots in 2D you can further enter a Maximum number of points (default: 100,000 points). For other plots, specify the order of the Gauss points in the Gauss point order field (default: 1). A higher order increases the arrow density in each element.
Select Mesh nodes for arrows positioned in the mesh element nodes (that is, more densely placed arrows where the mesh density is high). This option is available for Arrow Volume, Arrow Surface, and Arrow Edge plots. For Arrow Volume plots in 3D and Arrow Surface plots in 2D you can further enter a Maximum number of points (default: 100,000 points).
The following options are only available for Arrow Surface plots in 3D and Arrow Line plots on edges in 2D and 3D, and plots of principal stresses and strains on surfaces:
Select Mesh elements for arrows positioned in the mesh element centroids (that is, more densely placed arrows where the mesh density is high). This option is only available for Principal Stress plots.
Select Uniform (the default) for arrows positioned uniformly on the surface. Then enter the number of arrows to plot in the Number of arrows field (default: 200).
Select Uniform anisotropic to position the arrows using an anisotropic density (that is, more arrows in some directions than in others). In addition to entering the number of arrows to plot in the Number of arrows field (default: 200), use the x weight, y weight, and (in 3D) z weight fields to give weights for the arrow density in the different directions (using positive scalar weights). The default weights are 1 in all directions. A higher value increases the arrow density in the corresponding direction.
For Arrow Volume plots in 3D and Arrow Surface plots in 2D, you can also choose Grid and then, based on space dimension, in the x grid points, y grid points, and z grid points fields (r grid points and z grid points in 2D axial symmetry), select an Entry method: Number of points or Coordinates:
If Number of points is selected, enter the number of Points in each direction (default: 15).
If Coordinates is selected, enter Coordinates or click the Range button () to select and define specific coordinates.