Using the Overlap Projection Direction option

The Overlap Projection Direction option lets you control which normal is used to check for overlapping elements in thermal couplings.

Normal selection must be done according to the geometry of your model and the shape of the interstitial material.

This example illustrates the effect of using the normal of either the primary elements or secondary elements.

	Primary element with subdivision		Secondary element		Element Normal	─	Overlapping area

(A)	(B)

Overlap projection direction

• (A) The primary element normals are used to find overlapping elements. Only one subdivision of the primary element is found to overlap two secondary elements, only one is connected. The overlapping area is then the area of the first primary element subdivision.

• (B) The secondary element normals are used to find overlapping elements. Two subdivisions of the primary element are found to overlap two secondary elements, therefore both are connected. The overlapping area is the area of the two primary element subdivisions.

Note:

The overlapping area is always computed from the primary region.

How do I

Create a thermal coupling

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Model a BGA contact using a Thermal Coupling

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Create a perfect contact thermal coupling

Learn more

Thermal Coupling magnitude types

Additional Conductance types

Specifying a Coupling Resolution

Using the Only Connect Overlapping Elements option

Temperature dependency for thermal and electrical couplings

Inputs to expressions

Surface-to-Surface Contact

Thermal Coupling

Thermal Coupling — Advanced

Thermal Coupling — Convection

Thermal Coupling — Radiation

Look up more details

Thermal cyclic symmetry using perfect contact thermal coupling

Perfect Contact options

Auto-generated expressions

Thermal Coupling dialog box

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

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Using the Overlap Projection Direction option, Simcenter 3D 2021.1 Series

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