Orbital Heating

Use an Orbital Heating simulation object to request solar, albedo, and planet view factor calculations for selected elements within a defined orbit. Temperatures, orbital view factors, and heat fluxes may be recovered for post processing and visualization.

With Orbital Heating:

• Heat loads resulting from direct solar flux, albedo and planet IR are automatically modeled, using a radiosity approach to determine the reflection and absorption of the incident flux throughout the model.

• Ray-tracing is used for specular or transmissive surfaces.

• Eclipses are detected and modeled accurately.

• The spacecraft orientation can be anchored to the sun, a planet, or a star.

• Spacecraft rotations and spinning spacecraft can also be modeled.

• Orbit definitions may be of complete or partial orbit segments, and may be concatenated to model orbital maneuvers. You can also define orbits or orbital maneuvers by specifying time-varying sun and planet vectors.

• Orbited celestial objects can be modeled implicitly as a point or explicitly as a hemisphere.

Note:

For better results, when performing a transient analysis with unknown initial conditions, right click the Solution node and select Edit. On the Initial Conditions tab set the Initial Temperature list to Perform Steady-State Solution and the Transient Thermal Loads to Use for Steady State Initial Conditions list to Average over Time.

Previewing an orbit

To preview a defined orbit prior to solving the model, click Display in theOrbital Heating dialog box. You can export images of the orbit.

To read a text summary of the defined orbital heating simulation object, click Information.

Displaying simulation results

After solving the model, you can open the bun file that contains the orbital heating simulation results in the Orbit Visualizer and specify the simulation results you want to view in the graphic window. For more information, see Using the Orbit Visualizer.

Where do I find it?

Application	Pre/Post
Command Finder	Orbital Heating
Simulation Navigator	Right-click the Simulation Objects node→New Simulation Object→Orbital Heating

How do I

Set up an orbital heating simulation

View and animate satellite in orbit

Display satellite results in the orbit

Create an orbit modeling object

Learn more

Orbit

Inputs to expressions

Look up more details

Orbit Visualizer user interface

Results Display Setup dialog box

Using the Orbit Visualizer

Understanding Beta Angle orbit type parameters

Understanding Classical, Sun Synchronous, Shuttle, and Molniya orbit type parameters

Sun Planet Vectors orbit type parameters

Auto-generated expressions

Quick links

Simcenter 3D Thermal/Flow, Electronic Systems Cooling, and Space Systems Thermal boundary conditions

Thermal/Flow, Electronic Systems Cooling, and Space Systems Thermal

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

Browse Simcenter 3D help by product area

Orbital Heating, Simcenter 3D 2021.1 Series

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