Outlet
The Outlet node defines an edge or point where fluid leaves the gap.
Outlet Settings
Select an Outlet condition — Zero pressure (the default), Pressure, or Normal outflow velocity.
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For Zero pressure, pf = 0 applies on the boundary, edge, or point.
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For Pressure, enter a Pressure pf0 (SI unit: Pa) to impose pf = pf0 on the boundary, edge, or point. The default is 0 Pa. If the reference pressure pref, defined at the physics interface level is 0, pf0 is the absolute pressure. Otherwise, pf0 is the relative pressure.
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For Normal outflow velocity, enter a Normal outflow velocity U0 (SI unit: m/s). The default is 0 m/s.