Create a Convection to Environment constraint

Create a Free Convection to Environment constraint

1. In the Edit Solution dialog box, define Gravity Direction on the Ambient Conditions page. You can also optionally define a fluid ambient or radiative ambient temperature at the same time.

2. In the Convection to Environment dialog box, select the convecting geometry, meshed appropriately.Note: If different parts of the convecting geometry have different shapes or orientation to gravity, create a separate Convection to Environment constraint for each shape and orientation.

3. Select the Correlation and define the related options. The related options in the dialog box depend on which Correlationyou select.

4. Use Multiplier to adjust the convection coefficient to account for extended surfaces (fins) or the effects of roughness, or simply to adjust the correlation for actual model conditions.

5. Define the Fluid Material. You can select either of the pre-defined materials (Air or Water), or specify another material by selecting Specify and clicking the Choose material button that appears when the Fluid Material selection is set to Specify.

6. Define the Temperature. Select Fluid Ambient or Radiative Ambient to use the temperature value defined in Ambient Conditions, or select Specify to type a value in the Temperature Value box.

Create a Forced Convection to Environment constraint

1. In the Create Solution or Edit Solution dialog box, define Gravity Direction on the Ambient Conditions page.

2. In the Convection to Environment dialog box, select the convecting geometry, meshed with thermal elements.Note: If different parts of the convecting geometry have different shapes or orientation to gravity, create a separate Convection to Environment constraint for each shape and orientation.

3. Select the Correlation and the related options. The related options in the dialog box depend on the Correlationyou select.

4. Use Multiplier to adjust the convection coefficient to account for extended surfaces (fins) or the effects of roughness, or simply to fine tune the correlation.

5. Define the Fluid Material. You can select either of the pre-defined materials (Air or Water), or specify one by selecting Specify and clicking Choose material button that appears when the Fluid Material selection is set to Specify.

6. Define the Fluid Velocity.

7. Define the Temperature. Select Fluid Ambient or Radiative Ambient to use the temperature value as defined in Ambient Conditions, or select Specify to manually enter a temperature value.

Learn more

Convection to Environment

Convection to Environment types

Free convection correlations

Forced convection correlations

Inputs to expressions

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Auto-generated expressions

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