Applying a flame temperature to SURF152 elements

You can use the Use radiation to apply flame temperature on SURF152 exra node option in the Solution dialog box to define the radiation effect of a flame on a surface, given the temperature of the flame and the emissivity of the surface.

When you select this option, the software changes how it handles the properties that you have defined for a Radiation load in your solution.

• The specified Ambient Temperature value becomes the temperature for the flame.

• The specified Surface Emissivity value becomes the emissivity of the surface to which the flame is applied.

When you export or solve your model:

• The software creates SURF152 elements in your ANSYS input file. These SURF152 elements are overlaid on the element faces you selected in the Radiation dialog box. Each SURF152 element as an extra node at the center of each element’s face where ANSYS applies the specified Ambient Temperature as the flame temperature. The software automatically creates this extra node in your ANSYS input file when you export or solve your model.

• The software writes out the specified Surface Emissivity value out as an emissivity property for the material applied to the SURF152 elements.

The advantage of using SURF152 elements to apply the flame radiation is that you can apply other thermal boundary conditions, such as a Heat Flux or Convection, to the same underlying surface.

Only a single flame radiation value is supported in a given solution

You cannot apply multiple flame radiation definitions to the same surface. If your solution or subcase includes multiple Radiation definitions and you select the Use radiation to apply flame temperature on SURF152 exra node option, software applies the last Radiation definition you created during the analysis.

Where do I find it?

Use radiation to apply flame temperature on SURF152 exra node option

Application	Pre/Post
Prerequisite	In a Simulation file with ANSYS as the specified solver and Thermal as the specified analysis type
Simulation Navigator	Right-click the Simulation→New Solution
Menu	Insert→Solution

Radiation load

Application	Pre/Post
Prerequisite	In a Simulation file with ANSYS as the specified solver and Thermal as the specified analysis type
Command Finder	Radiation
Menu	Right-click Loads → New Load → Radiation

How do I

Manually creating surface effect elements

Manually creating contact elements

Create an ANSYS KEYOPT table

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Applying a flame temperature to SURF152 elements, Simcenter 3D 2021.1 Series

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