IR 6.2.10

16.2. Example 2

This section explains how to obtain the IR analysis of a satellite geometry model.

Step 1. The first step consists of creating a new data file where all the parameters of the simulation will be saved. Use the command ‘New’ from the File menu. Select IR type.

 Selection Method dialog panel

 

Step 2. The second step is to create the geometry model. In this example an existing geometry of a satellite will be open using the "Import" option. Select Geometry → Import and select "satellite.dxf" file. 

The newFASANT User Interface after importing the satellite model.

Satellite model imported

Step 3. The next step is to assign a material to the geometry model. Select Material → Assign Material and assign "Copper" to the surfaces of the geometry.

Assign material to the geometry model.

Assign material to the geometry model.

The assigned material can be reviewed at any time. You can click on the Material View icon in the toolbar in order to verify that it is correct. Also the Material Properties can be reviewed in the Materials menu from the toolbar.

Material View of the geometry model.

Material View of the geometry model.

Step 4. Configure the Environmental Parameters. Use the Environment  → Parameters option to configure the environment.

This option will open a new panel where it will be possible to configure different features of the environment, such as the atmosphere, wind, sun position, sea, geographical position and trajectory, and the transmittance of the atmosphere.

Atmosphere tab on environment parameters

 



Transmittance tab on environment parameters

Step 5. Set the Solver settings. In particular, we are interested in increasing the number of maximum iterations to 12.000. For this kind of project, we won't change the converge error nor the thermal inertia scaling factor. Press Save to update the project settings.

  

Setting the iterative process in the Solver settings.

Step 6. Mesh the geometry model. Configure the meshing parameters: set the divisions per meter on planar and curved surfaces to 12.

Set the divisions per meter.

Additionally, we are interested in duplicating normal vectors on open surfaces. This is something that is changed in the Advanced Options, at the Surfaces Replication tab. Make sure that Open Surfaces are being replicated by toggling on the Replicate Open Surfaces checkbox, and then set the Replication Area to "Replicate all open objects".

Advanced Meshing Parameters

Use Meshing → Create and visualize mesh option to create the mesh. 

Step 7. Execute the simulation. Select the number of processors to be used and click on "OK". Use Calculate → Execute to perform the thermal analysis. 

Calculate Process

Step 8. Show Simulation results.

  • Thermal Analysis: Use the Show Results → Thermal Analysis option to display the thermal analysis results.

Thermal Analysis view 

It is possible to display additional information of the image by clicking on the image while holding down the Ctrl key. The tab shows some information regarding the surface that has been selected. 

  • Radiance Analysis: Use the Show Results → Radiance option to display the radiance results.

This view displays some information about the radiance results and allows to configure the same settings as the thermal vision view. The main difference is the information shown in the window when clicking on the image while pressing the Ctrl key.

Radiance View 

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