The Vacuum Pump node models the effective outlet pressure created by a vacuum pump device that is attached to the outlet.
For the Static pressure curve, linear option, values or expressions should be specified for the
Static pressure at no flow pnf and the
Free delivery flux V0,fd.
The Static pressure curve, data option can be used to enter or load data under the
Static Pressure Curve Data section below. The interpolation between points given in the
Static Pressure Curve Data table is defined using the
Interpolation function type list in the
Static Pressure Curve Interpolation section.
The User defined option can be used to enter a different value or expression. The flux across the selection where this boundary condition is applied is defined by
phys_id.V0 where
phys_id is the name (for example,
phys_id is
spf by default for this physics interface). In order to avoid unexpected behavior, the function used for the fan curve is the maximum of the user-defined function and 0.
This section displays when Static pressure curve, data is selected as the
Flow condition. In the table, values or expressions for the
Flux and
Static pressure curve should be specified. Alternatively, a text file can be imported by clicking the
Load from file button (
) under the table.
This section is available when Static pressure curve, data is selected as the
Flow condition. Units can be specified here for the
Flux and
Static pressure curve.
This section is available when Static pressure curve, data is selected as the
Flow condition. The available options for the
Interpolation function type are
Linear,
Piecewise cubic, and
Cubic spline.