Displaying fields

You can display fields whose independent domains contain spatial variables. When you display such a field, you can display the spatial portion of the independent domain only, the spatial variation of the dependent domain only, or both simultaneously. When the independent domain contains a non-spatial variable and spatial variables, you can specify the value of the non-spatial variable at which to create the display.

To display a field, in the Simulation Navigator, select the check box for the field. After you display the field, you can use the commands contained in the Field Display Properties dialog box to customize how the field is displayed. Some of these customization options are described below.

Visualizing the independent domain

When you display the independent domain of a field, you can:

• Specify whether the display is a grid (1) or points (2). You can also specify the type of symbol like an asterisk, plus sign, and so on, that the software uses to designate points in the display.

• Use the resolution options like coarse (1) and fine (2) to specify the density of points that the software uses in the display.

• Display the spatial extents of the field (1) or use the user-specified resolution option to limit the spatial range of the display (2).

Visualizing the dependent domain

When you display the dependent domain of a field, you can:

• Display one dependent variable at a time.If the dependent domain is a scalar quantity like pressure, the software automatically displays the magnitude of the scalar quantity.If the dependent domain is a vector quantity like component force, the software allows you to choose whether to display one of the components or the magnitude of the vector.If the dependent domain is a tensor quantity like stress, the software allows you to choose whether to display one of the components, a principal value, or quantities derived from the components like von Mises stress.If the dependent domain contains multiple scalar quantities like two frequencies, the software treats the scalar quantities as if they are the components of a vector. Thus, the software allows you to choose whether to display one of the scalar quantities or the magnitude of the two scalar quantities, where the magnitude is the square root of the sum of the squares of each scalar quantity.If the dependent quantity is complex, the software allows you to choose whether to display the magnitude, phase, real part, or imaginary part.

• Use either color-coded spheres (1), a contour plot (2), or a contour plot with edges to show how the dependent variable varies spatially. You can turn on the color bar to view the numerical values that are associated with each color in these displays.Note: In (1), the relative size of the spheres indicate the relative magnitude from point to point. Thus, the sphere size that corresponds to -100 is identical to the sphere size that corresponds to +100.

• Use the resolution options like coarse (1) and fine (2) to specify the density of points that the software uses in the display.

• Display the spatial extents of the field (1) or use the user-specified resolution option to limit the spatial range of the display (2).

• Display values of the dependent variable that are below a minimum value (underflow) or over a maximum value (overflow) in colors that you specify. In the figure, the overflow values are in black and the underflow values are in magenta.

Displaying table fields with independent domains that consist of a non-spatial variable and spatial variables

For table fields with independent domains that consist of spatial variables only, each set of spatial coordinates (a spatial location) maps to a single dependent variable value. Consequently, there is no ambiguity with regard to the values that the software uses when it displays the dependent variable.

For table fields with independent domains that consist of a non-spatial variable and spatial variables, each spatial location can map to multiple values of the dependent variable.

For example, if the non-spatial variable is time and the dependent variable is pressure, at each spatial location, there can be a different value for pressure at each time. Thus, you must specify which value for pressure the software uses when it creates the dependent variable display.

To do so, in the Field Display Properties dialog box, on the Results tab, in the Filtering Criterion group, from the Filter Options list, select the option for determining which value of a dependent variable to use at each spatial location. You can select from the following options:

• Use the arithmetic average of the dependent variable values.

• Specify the value of the non-spatial independent variable from which to obtain the values of the dependent variable.

• Use the dependent variable values that correspond to the first non-spatial independent variable listed in the tabular data.

• Use the dependent variable values that correspond to the last non-spatial independent variable listed in the tabular data.

• Use the minimum value of the dependent variable.

• Use the maximum value of the dependent variable.

• Display the value of the dependent variable at spatial locations where only a single tabular data point exists.

Displaying Delaunay triangularization or tetrahedralization

For table fields or fields whose source field is a table field, you can display a contour plot of a dependent variable directly from the tabular data when:

• The interpolation method is a Delaunay method.

• The independent domain is spatial.

• The interpolator exists.

You can display the contour plot with or without a wireframe grid. The wireframe grid represents the Delaunay triangularization or tetrahedralization of the tabular data. By displaying the Delaunay triangularization or tetrahedralization, you are able to assess the likelihood that the Delaunay method calculates meaningful table lookup values.

For example, for an independent domain that consists of two variables or consists of three spatial variables that either degenerate to a planar surface or are mapped to a surface, the Delaunay methods subdivide the independent domain into a mesh of triangles. The mesh of triangles is referred to as the Delaunay triangularization.

For a meaningful table lookup, you typically want to use the tabular data that lies in closest proximity to the lookup point in the interpolation calculation. However, if two legs of a triangle in the Delaunay triangularization are distinctly longer than the third, there is a likelihood that the three tabular data points closest to the lookup point are not those used in the interpolation calculation. A triangle that has such a shape is referred to as a sliver triangle. To improve the likelihood of a meaningful table lookup, you can remove sliver triangles from the Delaunay triangularization.

Note:

At present, you cannot remove sliver tetrahedrons.

For more information, see Removing sliver triangles.

Where do I find it?

Displaying a field

Application	Pre/Post
Prerequisites	A field with spatial variables in the independent domain in the Simulation Navigator under the Fields node
Simulation Navigator	Expand the Fields node→select the check box of the field

Editing the display of a field

Application	Pre/Post
Prerequisites	A field with spatial variables in the independent domain in the Simulation Navigator under the Fields node
Simulation Navigator	Expand the Fields node→right-click a field→Edit Display

Filtering dependent variable values

Application	Pre/Post
Prerequisites	A displayed table field with an independent domain that consists of a non-spatial variable and spatial variables
Simulation Navigator	Right-click the node of the displayed table field and choose Edit Display
Location in dialog box	Results tab→Filtering Criterion group→Filter Options list

Displaying the Delaunay triangularization or tetrahedralization

Application	Pre/Post
Prerequisites	A displayed table field or a field whose source field is a table field, the interpolation method is a Delaunay method, and the interpolator is created
Simulation Navigator	Right-click the displayed field node→Edit Display
Location in dialog box	Field Display Properties dialog box→Results tab→Source Table Values group→Display Type list→Contours With Edges

How do I

Create a 2D graph of a formula field

Create a 2D graph of a table field

Create a 3D graph of a formula field

Create a 3D graph of a table field

Create a 3D graph of structured 2D data

Learn more

Graphing fields

Quick links

Command reference

Pre/Post video examples

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Displaying fields, Simcenter 3D 2021.1 Series

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