-
From the Fans section of the action bar,
click Fan Interface
 .
- Optional:
Enter a descriptive
Name.
-
Select the
Upstream surface and
Downstream surface that represent the two sides of
the interface.
-
From the
Contact search parameters, specify the
distance-based tolerance for contact by selecting one of the following choices
from the
Tolerance Type options:
| Option | Description |
|---|
| Absolute |
Specify tolerance as an absolute distance, then enter the
distance in the
Normal Tolerance field. |
|---|
| Relative |
Specify tolerance relative to the typical
mesh
element size, then enter the relative size as a decimal in the
Normal Tolerance field. |
|---|
-
From the
Contact search parameters, specify the default
Angle Tolerance for contact.
- Optional:
From the Pressure jump options, choose one of the following
methods for specifying the pressure rise caused by flow through the fan:
| Option | Description |
|---|
| Constant |
Constant pressure increase across the fan interface. |
| Fan curve |
Pressure increase as a function of volume flow rate. |
-
To define a constant pressure jump across the fan interface:
-
From the Pressure jump options, select
Constant.
-
Specify the pressure change across the fan in the Pressure
jump field.
-
To define a pressure jump that varies according to the volume flow rate:
-
From the Pressure jump options, select Fan
curve.
-
Specify pairs of Volume flow rate and Pressure
jump values in the table that appears.
- Optional:
Simulate swirl velocity downstream from the fan:
-
Select Enable swirl velocity.
-
Specify a custom Hub radius for the fan.
-
In the data table that appears, describe the swirl by entering the tangential and
radial velocity data as a function of the radius.
-
Click OK.
|
to change the side of the surface you select.