Applying Prescribed Temperatures

You can apply a prescribed temperature to constrain a region to a fixed temperature value throughout the simulation.

This task shows you how to:

See Also
About Prescribed Temperatures
Spatially Varying Mapped Data
In Other Guides
Creating Simulation Features
Support Selection
Entering Tabular Data

Apply Uniform Prescribed Temperatures

You can apply a prescribed temperature that is uniform across the entire body.

Note: Create a temperature initial condition to establish the starting temperature before solving any simulation with temperature-dependent features.

  1. From the Loads or Thermal section of the action bar, click Prescribed Temperature or Temperature .
  2. Optional: Enter a descriptive Name.
  3. Select the geometry supports in the model.

    You can apply a prescribed temperature to one or more points, edges, or faces.

  4. For a structural or thermal simulation, specify Uniform for the Distribution.
  5. Enter a value for the Temperature.
  6. Optional: Enter a Scale factor that is applied to the magnitude in each step.
  7. Optional: Select an Amplitude that defines the magnitude during the step.
  8. Click OK.

Apply Spatially Varying Prescribed Temperatures with Mapped Data

You can apply a prescribed temperature that has different values at different points on the model.

Note: Create a temperature initial condition to establish the starting temperature before solving any simulation with temperature-dependent features.

Before you begin: You must have your spatially mapped data prepared with different temperature values specified at various points in space.
  1. From the Loads or Thermal section of the action bar, click Prescribed Temperature or Temperature .
  2. Optional: Enter a descriptive Name.
  3. Select the geometry supports in the model.

    You can apply a prescribed temperature to one or more 2D or 3D bodies in a structural or thermal analysis case.

  4. Specify Mapped spatial data for the Distribution.
  5. Click Table.
    The Temperature Distribution dialog box opens, where you can enter or import the mapped temperature values.
  6. Choose the Data source for the mapped temperature values:
    • Table: Enter or import the mapped data into the table.

    • Referenced document: Select a 3DEXPERIENCE document that contains the mapping data. Click to search for the document in the 3DEXPERIENCE platform database. For details about the required file format, see Mapping Data File Formats.

      Every time you run the simulation, the app takes into account any changes in the referenced document.

  7. If Data source is Table, specify the mapped data in the table:
    • To import the data, right-click anywhere in the table and select Import. For details about the file format required, see Mapping Data File Formats.
    • To enter the data manually, double-click in each cell and enter a value. For example, enter X-, Y-, and Z-coordinates and the corresponding temperature Value in each row of the table.
  8. Enter the Temperature outside the mapped region. This is a default temperature value.

    The simulation attempts to map all of the source data points and their associated temperature values onto points in the target model. For any target points where the simulation cannot map to a source point, it substitutes this default value.

  9. Select an Axis system definition for the coordinates of the mapped data values.

    • Global: Aligns the local feature triad with the global coordinate system.

    • Local: Aligns the local feature triad with a selected axis system in the model.

      Using a custom local axis system simplifies the three-dimensional definition of points in space. The app interprets the X-, Y-, Z-coordinates in the context of the local coordinate system.

  10. Optional: Select Plot Data to display symbols that indicate the locations and magnitudes of the mapped values on the model.

    Tip: If you click any row in the data table, the corresponding source point is highlighted on the model.

  11. Optional: To adjust the search control parameters, expand Search tolerance.

    See Mapping Search Controls and Mapping Search Control Options for descriptions of these parameters.

  12. Optional: Enter a Scale factor that is applied to the magnitude in each step.
  13. Optional: Select an Amplitude that defines the magnitude during the step.
  14. Click OK.

Apply Prescribed Temperatures from Thermal Steps

In a sequential thermal-stress analysis, you can calculate spatially varying temperature data during the thermal case and apply those temperatures as spatial- and time-dependent temperatures during the structural case.

Note: Create a temperature initial condition to establish the starting temperature before solving any simulation with temperature-dependent features.

  1. From the Thermal section of the action bar, click Prescribed Temperature or Temperature .
  2. Optional: Enter a descriptive Name.
  3. Select the geometry supports in the model.
  4. Set Distribution to From step.
  5. Select the thermal analysis case.
  6. Specify the Absolute exterior tolerance, which is the value by which nodes of the stress/deformation model might lie outside the region of the elements of the heat transfer model.

    If this value is zero (default), the value for the relative exterior tolerance is used.

  7. Specify the Relative exterior tolerance.

    The relative exterior tolerance is the fraction of the average element size by which nodes of the stress/deformation model might lie outside the region of the elements of the heat transfer model.

  8. From the Beginning step and Begin increment options, specify the thermal step and increment from which you want to specify the starting temperature value.
  9. From the Ending step and End increment options, specify the thermal step and increment from which you want to specify the ending temperature value.
  10. Click OK.