Independent domain options for reference fields

The independent domain options for a reference field depend on the following factors:

• Whether the results displayed in the post view are from a run that contains a single solve or a run that contains solves at multiple time or frequency steps

• The physical quantity type

• The result type

• Whether the results are averaged

• Whether the model is axisymmetric

The following table lists the independent domain options that are available for each combination of factors.

Physical quantity type	Result type	Example Result	Averaging(1)	Independent domain options
Cartesian(2)	Time, Cartesian(2)(3)	Frequency, Cartesian(2)(3)	Node ID	Element ID	Element-Node ID
Scalar	Nodal	Temperature	N/A	X	X	X	X
Vector	Nodal	Displacement	N/A	X	X	X	X
Elemental	Heat flux	Unaveraged		X(4)	X(4)		X
Averaged	X	X	X	X
Element-Nodal	Grid point force	Unaveraged	X(4)	X(4)	X(4)	X(4)		X
Averaged	X	X	X	X
Tensor	Elemental	Stress	Unaveraged		X(4)	X(4)		X
Averaged	X	X	X	X
Element-Nodal	Stress	Unaveraged	X(4)	X(4)	X(4)	X(4)		X
Averaged	X	X	X	X
(1) Averaging as specified with the Set Result command. (2) For axisymmetric models, Axisymmetric Plane, Time, Axisymmetric Plane, and Frequency, Axisymmetric Plane are available whenever Cartesian, Time, Cartesian, and Frequency, Cartesian, respectively are available. (3) Only available for runs that contain multiple time or frequency steps. (4) If the displayed result is unaveraged elemental or unaveraged element-nodal, and the independent domain is Cartesian, Axisymmetric Plane, Time, Cartesian, Time, Axisymmetric Plane, Frequency, Cartesian, Frequency, Axisymmetric Plane, or Node ID, the reference field automatically averages the results it accesses in the solver output file so that a unique result corresponds to each set of coordinates or node ID.

Coordinate basis of spatial independent domains

When you select an independent domain that includes spatial coordinates, you can specify whether the spatial coordinates are measured relative to the global coordinate system or a local coordinate system. To do so, in the Create Field dialog box, in the Spatial Map group, from the Type list, select from the following options:

• Select the Global option to measure the spatial coordinates relative to the global coordinate system.

• Select the Cartesian option, or for axisymmetric models, select the Cylindrical option to measure the spatial coordinates relative to a local coordinate system. When you choose one of these options, the reference field behaves like a linked field, but still retains the ability to update if the model is rerun.For information on linked fields, see Linked fields.Tip: Because you cannot select a local coordinate system in a post view, open a second viewport that displays the model. Select the local coordinate system from this viewport.

Cartesian independent domain option

The independent domain is the Cartesian coordinates of the nodes relative to the coordinate system specified in the spatial map.

Time, Cartesian independent domain option

The independent domain is the Cartesian coordinates of the nodes relative to the coordinate system specified in the spatial map at each time step.

For example, for two time steps, the reference field accesses two results for each node. There are:

• One result that corresponds to the first time step

• One result that corresponds to the second time step

Frequency, Cartesian independent domain option

The same as Time, Cartesian, except that the results are at each frequency step.

Node ID independent domain option

The independent domain is node ID.

Element ID independent domain option

The independent domain is element ID.

Element-Node ID independent domain option

The independent domain is both element ID and node ID.

For example, if elements 10 and 20 share node 50, the reference field accesses two results for node 50.

• One result that corresponds to an independent domain of element 10 and node 50

• One result that corresponds to an independent domain of element 20 and node 50

Axisymmetric Plane independent domain option

The independent domain is the radial and axial coordinates of the nodes relative to the coordinate system specified in the spatial map.

Time, Axisymmetric Plane independent domain option

The independent domain is the radial and axial coordinates of the nodes relative to the coordinate system specified in the spatial map at each time step.

Frequency, Axisymmetric Plane independent domain option

The same as Time, Axisymmetric Plane, except that the results are at each frequency step.

How do I

Create a reference field

Define a boundary condition using a reference field

Use a reference field in a thermal stress analysis

Learn more

Reference fields

Specifying the range of fields created from results

Reference fields vs. table fields

Look up more details

Dependent domain options for reference fields

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