Chapter 6	STAR SET-UP IN ES-ICE
	Boundary Conditions
	Port and Valve 2
	You can now specify boundary conditions for Port and Valve 2.

•Select Port and Valve 2 from the domain drop-down menu

•Set Extra regions > Name to Exhaust Flow Boundary

•Use the Boundary Tool to select the exhaust flow boundary patch, as shown in Figure 6-17

Exhaust Flow Boundary

Figure 6-17 Redefining wall boundary condition for Port 2

To set the Exhaust Flow Pressure boundary conditions as shown in Figure 6-18:

•Set Absolute pressure to Mean from the drop-down menu

•For Absolute pressure and Temperature values, follow similar steps to those for the Initialization process to import relevant data from the exhaust-3600.dat image file

Version 4.20

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STAR SET-UP IN ES-ICE	Chapter 6
Boundary Conditions

Figure 6-18 Star Controls panel: Boundary conditions view of Port 2

Global settings

In older versions of es-ice, the Standard wall function model was used to calculate both momentum and heat transfer near the wall region. If you wanted to use a different model, you had to provide it via the MODSWF user subroutine. In the current version, three additional wall function models are available, namely

Han/Reitz, Angelberger and Modified Angelberger. Importing the es-ice model into pro-STAR sets up these wall functions for use when running the STAR solver.

In this tutorial, you will use the default Angelberger wall function.

•Select Global settings from the domain drop-down menu

•Check that Wall function model is set to Angelberger, as shown in Figure 6-19

•Ensure that the consistently toggle button is selected

•Click Join regions

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