Importing thermal and flow analysis data

You can import the thermal and flow analysis data created in NX I-deas ESC Electronic Systems Cooling, NX I-deas TMG Thermal Analysis, Femap TMG Thermal and Flow, and other CAE applications into Simcenter 3D Thermal/Flow, Simcenter 3D Electronic Systems Cooling, and Simcenter 3D Space Systems Thermal.

You can also import warning and error groups created during a solve.

During the import process, the software generates a FEM file and a Simulation file containing fully defined, analogous Pre/Post objects that correspond to the objects in the imported file. The software imports finite element data, not model geometry. Depending on the source file type you import, the software supports the import of different types of data. See Import options for Simcenter 3D Thermal/Flow, Electronic Systems Cooling, and Space Systems Thermal for more information.

Importing UNV files

You can import UNV files created by NX I-deas TMG, NX I-deas ESC, or Femap TMG by selecting one of the following solvers:

• Simcenter 3D Thermal/Flow

• Simcenter 3D Space Systems Thermal

• Simcenter 3D Electronic Systems Cooling

You select the solver from the Select solver list in the Import dialog box.

In the selected solver environment, the software creates a FEM and a Simulation file that contain meshes, mesh collectors, physical properties, boundary conditions, and solutions stored in the UNV file.

It is suggested to use the I-DEAS Universal file type to import the thermal and flow analysis data created in NX I-deas TMG, NX I-deas ESC, or the Femap TMG application to Simcenter 3D Thermal/Flow, Simcenter 3D Electronic Systems Cooling, and Simcenter 3D Space Systems Thermal.

Note:

If you import the UNV file by selecting I-DEAS Universal, the created FEM uses the I-deas UNV solver language instead of the Simcenter 3D Thermal/Flow, Simcenter 3D Space Systems Thermal, or Simcenter 3D Electronic Systems Cooling solver languages. The Simulation file is not created.

Importing error and warning groups from a solution

You can import groups that contain elements associated to warning or error messages in a solution. You can import these groups from any solution into a previously created FEM file or Simulation file. These groups help you to verify and post process your model.

The groups information is saved in a groups.unv file. This file is created in the run folder each time you run any of the following simulations:

• Simcenter 3D Thermal/Flow

• Simcenter 3D Electronic Systems Cooling

• Simcenter 3D Space Systems Thermal

You can import error and warning groups from any solution into any FEM file or Simulation file. Make sure you select the groups.unv from the running folder of the appropriate solution.

After groups are imported, they are available under the Groups node in the Simulation Navigator.

Simulations containing assembly FEMs are not supported.

Importing NX I-deas materials

Material properties defined in NX I-deas using functions are imported with UNV files as a table with a resolution of 20 points.

Function based material properties defined in I-deas with more than one variable are not supported.

UNV import of axisymmetric thermal models

You can import UNV models that contain axisymmetric elements into both a thermal model and an axisymmetric thermal model.

When importing UNV models, if axisymmetric elements are detected, the following message appears in the Model Information text box of the Import Options dialog box:

Axisymmetric elements were detected

If you set the Set Simulation Analysis Type To list to:

• Coupled Thermal-Flow, the software imports axisymmetric elements as normal elements and creates the Advanced Controls simulation objects with the Generic Entity types named:Converted_Axi_Shells to reference axisymmetric shell elements.Converted_Axi_Solids to reference axisymmetric solid elements.

• Axisymmetric Thermal, the software imports axisymmetric elements into the axisymmetric thermal model.

Importing CGNS

The CFD General Notation System (CGNS) is a standard format for recording computational fluid dynamics (CFD) analysis data.

The CGNS import interface uses version 3.2.1 of the CGNS library and uses mid-level library to read CGNS files.

CGNS import supports nodes and elements, but does not support geometry, boundary conditions, and element properties. CGNS imports structured and unstructured grids, segregated and mixed element types. The import supports the following element types:

• BAR 2 and BAR 3

• QUAD 4 and BAR 8

• TETRA 4 and TETRA 10

• PENTA 6 and PENTA 15

• HEXA 8 and HEXA 20

• PYRA 5 and PYRA 13

• Mixed elements

Importing radiation models

You can import radiation models into Simcenter 3D Space Systems Thermal simulations from:

• TSS v11.01

• ESARAD version 5.8

• Thermica

• Step-Tas v6

The import preserves primitives, their position, their material properties, and their thickness. Primitives defined as assemblies are imported correctly, but assemblies are not preserved. You have the additional option of preserving the names defined in the SYSBAS file when importing from Thermica for easy identification.

For more information on importing Thermal Desktop TSS models, see Importing TSS radiation models.

Each primitive is imported into the current FEM as a primitive inside a mesh collector. You can use the Simulation Navigator to modify the primitive or the mesh collector attributes. For more information, see Primitives for Simcenter 3D Space Systems Thermal.

How do I

Import thermal and flow analysis data

Import solution error and warning groups

Look up more details

Import options for Simcenter 3D Thermal/Flow, Electronic Systems Cooling, and Space Systems Thermal

Importing TSS radiation models

Supported features for importing radiation models

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

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Importing thermal and flow analysis data, Simcenter 3D 2021.1 Series

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