XY plots of boundary conditions

Use the Boundary Condition XY Plot command to generate an XY plot of loads, constraints, and solver-specific simulation objects that vary with a quantity such as time or temperature. You can use these plots to verify your loading conditions, to generate high-quality visualizations for reports or presentations, and to interrogate and extract loading data.

The boundary condition to plot must reside in a dynamic solution and the boundary condition’s domain must match the domain of the solution. For example, you can plot a force load that is driven by a time-dependent field if the force load resides in a direct transient solution subcase.

You can plot the overall magnitude of the boundary condition at each iteration value, or plot the portion of that magnitude that is distributed to a selected location at each iteration value. You can select a node, element, element edge, or element face, depending on how the boundary condition is distributed:

When the BC is distributed to...	You can select:
Nodes	Node
Elements	Element
Element faces	Element face
Element edges	Element edge
FEM	Element, edge, or face
Corner nodes	Node

After you generate the XY plot, you can use the XY Graph commands on the Results tab to change the display of the graph.

Supported quantities

The boundary condition to plot must be defined with a condition sequence parameter, or with a field that has one of the following quantities defined as the independent variable:

• Frequency

• Heat Flow

• Mass Flow

• Force per Area

• Temperature

• Temperature Difference

• Thermal Capacitance

• Time

• Velocity

• Volume Flow

Graph X range

The software infers the X range of the graph automatically, depending on how the boundary condition is defined:

• If the boundary condition is defined with a field, the X range is that of the independent variable of the field.

• If the boundary condition is defined with a condition sequence parameter, the X range is defined by the condition sequence.

If the boundary condition is defined with a field and a condition sequence parameter, or with multiple fields, the range is a union, regardless of the property that you are plotting.

XY plotting boundary conditions

You can plot a single boundary condition by selecting it from an appropriate Simulation Navigator container and choosing XY Plot.

Or, you can right-click your solution and choose XY Plot Boundary Conditions. The Boundary Condition XY Plot dialog box lists the boundary conditions that are currently included in the solution. You select a boundary condition from the list as the seed item. The remaining boundary conditions that are compatible with the seed item are available to be selected. The incompatible boundary conditions are displayed in red and are unavailable.

If you select multiple boundary conditions to plot, a separate curve is generated for each boundary condition.

Specifying the component to plot

When a boundary condition is made up of components, you can change the component to plot. In the Selected Boundary Conditions list, right-click the property in the appropriate row and select the new component from the list that displays. For example, for a component Pressure load, select Px/Pr, Py/Pt, Pz/Pp, or Magnitude. For a Convection constraint, select Ambient Temperature or Convection Coefficient.

When you plot multiple boundary conditions together, the list of components shows only the components that are shared by all of the selected boundary conditions.

Multiple values evaluation

The software evaluates the magnitude property value for each selected boundary condition at the specified location at each iteration value. If the specified location matches multiple items (for example, you select a solid element and the boundary condition is distributed to the element faces), the software plots the values according to the Multiple Matches option. You can specify that the values be added or averaged, or that a separate curve be displayed for each match.

Where do I find it?

Application	Pre/Post
Prerequisite	A Simulation file as the work part.A dynamic solution that contains a boundary condition defined with a field that matches the domain of the solution.
Simulation Navigator	Right-click one or more loads, constraints, or solver-specific simulation objects → XY PlotRight-click the solution node → Boundary Condition XY Plot

How do I

Modify the boundary conditions display

Generate contour plots of boundary conditions

Generate XY plots of boundary conditions

Learn more

Displaying boundary conditions

Highlighting geometry associated with boundary conditions

Contour plots of boundary conditions

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XY plots of boundary conditions, Simcenter 3D 2021.1 Series

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