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7.26.3 Using Boundary Profiles

The procedure for using a boundary profile to define a particular boundary condition is outlined below.

1.   Create a file that contains the desired boundary profile, following the format described in Section  7.26.2.

2.   Read the boundary profile using the Read... button in the Boundary Profiles panel (Figure  7.26.1) or the File/Read/Profile... menu item.

Define $\rightarrow$ Profiles...

File $\rightarrow$ Read $\rightarrow$ Profile...

3.   In the boundary conditions panels (e.g., the Velocity Inlet and Pressure Inlet panels), the fields defined in the profile file (and those defined in any other profile file that you have read in) will appear in the drop-down list to the right of or below each parameter for which profile specification is allowed. To use a particular profile, select it in the list.

figure   

Boundary profiles cannot be used to define volumetric source terms. If you want to define a non-constant source term, you will need to use a user-defined function.

For more information on UDFs, refer to the separate UDF Manual.

Note that if you use the Boundary Profiles panel to read a file, and a profile in the file has the same name as an existing profile, the old profile will be overwritten.



Checking and Deleting Profiles


Each profile file contains one or more profiles, and each profile has one or more fields defined in it. Once you have read in a profile file, you can check which fields are defined in each profile, and you can also delete a particular profile. These tasks are accomplished in the Boundary Profiles panel (Figure  7.26.1).

Define $\rightarrow$ Profiles...

Figure 7.26.1: The Boundary Profiles Panel
figure

To check which fields are defined in a particular profile, select the profile name in the Profile list. The available fields in that file will be displayed in the Fields list. In Figure  7.26.1, the profile fields from the profile file of Section  7.26.2 are shown.

To delete a profile, select it in the Profiles list and click on the Delete button. When a profile is deleted, all fields defined in it will be removed from the Fields list.



Example


For the example given in Section  7.26.2, the profiles are used for inlet values of $x$ velocity, turbulent kinetic energy, and turbulent kinetic energy dissipation rate, as illustrated in Figure  7.26.2. (The $y$ velocity is set to a constant value of zero, since it is assumed negligible. However, a profile of $y$ velocity could also be used.)

Figure 7.26.2: Example of Using Profiles as Boundary Conditions
figure

Once the profiles have been specified, the boundary conditions have been saved ( OK'd), and the flow solution has been initialized, you can view the inlet profile as follows:


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