Spinning types

Use the Spinning — All Elements type of Solid Motion Effects simulation object to model the thermal effects of a spinning model. All elements in the model spin together. An example is modeling a spinning spacecraft that spins rapidly around a specified axis.

Use the Spinning — Selected Elements type of Solid Motion Effects simulation object to model the thermal effects of a model with a spinning component.

A spinning component spins around the specified axis much faster than the thermal time constants of the model. The effects of the spinning are averaged over the revolution, because there is no time for the model to react thermally to one full revolution.

Cylinder spinning between a hot and a cold plate

You select the spinning axis, and specify the number of calculations per spin, N. The thermal solver calculates the view factors and thermal couplings due to the spinning N times, each time rotating the spinning region by 360/N degrees. The thermal solver averages the view factors and thermal couplings of these N positions.

The view factors include:

• Solar, earth, and albedo view factors from orbital heating.

• Heat flux view factors from radiative heating.

• Black body and ray-traced view factors from the deterministic and hemicube methods.

• Ray-traced view factors, radiative couplings, and heat loads from the Monte Carlo method.

Note:

To obtain an accuracy, especially for thermal coupling calculations, set N to a value greater than the number of elements around the circumference of the spinning part.

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Model articulation

Model the spinning of selected elements

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Create a Joint-Orbital Tracker modeling object

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

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Spinning types, Simcenter 3D 2021.1 Series

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