Boundary conditions > Simulation objects > Simcenter 3D Thermal/Flow, Electronic Systems Cooling, and Space Systems Thermal simulation objects > Thermal Coupling
Create a perfect contact thermal coupling
Choose Home tab→Loads and Conditions group→Thermal Coupling .
In the Thermal Coupling dialog box, select Perfect Contact from the Type list.
Select a Primary Region to represent one of the two perfect contact surfaces. Typically this would be the smaller surface of the two.
Select a Secondary Region to represent the other surface.
Select the Overlap Projection Direction, or clear the Only Connect Overlapping Elements check box if your geometry requires it.
How do I
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Learn more
Thermal Coupling magnitude types
Additional Conductance types
Specifying a Coupling Resolution
Using the Only Connect Overlapping Elements option
Using the Overlap Projection Direction option
Temperature dependency for thermal and electrical couplings
Inputs to expressions
Look up more details
Thermal cyclic symmetry using perfect contact thermal coupling
Perfect Contact options
Auto-generated expressions
Thermal Coupling dialog box
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Simcenter 3D Thermal/Flow, Electronic Systems Cooling, and Space Systems Thermal boundary conditions
Thermal/Flow, Electronic Systems Cooling, and Space Systems Thermal
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Create a perfect contact thermal coupling, Simcenter 3D 2021.1 Series
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Source: https://docs.sw.siemens.com/en-US/doc/289054037/PL20200601120302950.advanced/id631956 · retrieved 2026-07-17