Create a Thermal Coupling — Convection

Create a Forced Convection Coupling

1. Choose Home tab→Loads and Conditions group→Thermal Coupling — Convection .

2. In the Thermal Coupling — Convection dialog box, select Forced Convection Coupling from the Type list.

3. Select geometry meshed with thermal elements, or the elements themselves to model the Convecting Region. Typically, this models the walls of the duct, though it may be any object that has convective conductances with the fluid inside.

4. Select 1D geometry meshed with fluid duct elements or the 1D elements themselves to model the Fluid Ducts.

5. In the Parameters group, select a forced convection correlation from the Type list.

6. Depending on the Type option you select, specify an expression for:The Multiplier or a field varying with time, temperature, mass flow rate, temperature difference between the two regions, or volume flow rate.The Heat Transfer Coefficient or a field varying with time, temperature, or temperature difference between the two regions.

7. Select a Coupling Resolution option form the list.

Create a Free Convection Coupling

1. Choose Home tab→Loads and Conditions group→Thermal Coupling — Convection .

2. In the Thermal Coupling — Convection dialog box, select Free Convection Coupling from the Type list.

3. Select a Convecting Region to model the convecting surface. You can select a face of a polygon body meshed with 3D elements, a polygon face meshed with 2D elements, the edge of a polygon face meshed with 2D elements, an edge or curve meshed with 1D beam elements.

4. Select 1D geometry meshed with fluid duct elements or the 1D elements themselves to model the Fluid Ducts.

5. In the Parameters group, select a free convection correlation from the Correlation list. The option you select will determine the additional parameter options required to specify convection characteristics.

6. Specify an expression for the Multiplier or a field varying with time, temperature, or temperature difference between the two regions.

7. Select a Coupling Resolution option form the list.

Create an Across Gap Convection Coupling

1. Choose Home tab→Loads and Conditions group→Thermal Coupling — Convection .

2. In the Thermal Coupling — Convection dialog box, select Across Gap Convection Coupling from the Type list.

3. Select a Primary Region to represent one of the two parallel surfaces. Typically this would be the smaller of the two.

4. Select a Secondary Region to represent the other parallel surface.

5. Select a correlation option from the Type list. The correlation you select determines the parameters you must define.

6. Specify an expression for the Multiplier or a field varying with time, temperature, or temperature difference between the two regions.

7. Select a Coupling Resolution option form the list.

8. In the Environment group, select a material option from the Fluid Material list.

How do I

Define a convection coupling between duct nodes and solid faces

Learn more

Thermal Coupling — Convection types

Across gap coupling convection correlations

Duct Convection Correction modeling object

Inputs to expressions

Free convection correlations

Forced convection correlations

Specifying a Coupling Resolution

Using the Only Connect Overlapping Elements option

Using the Overlap Projection Direction option

Look up more details

Duct Node Convection Coupling options

Auto-generated expressions

Thermal Coupling — Convection 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

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Create a Thermal Coupling — Convection, Simcenter 3D 2021.1 Series

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