Outflow
This node provides a suitable boundary condition for convection-dominated heat transfer at outlet boundaries. In a model with convective heat transfer, this condition states that the only heat transfer occurring across the boundary is by convection. The temperature gradient in the normal direction is zero, and there is no radiation. This is usually a good approximation of the conditions at an outlet boundary in a heat transfer model with fluid flow.
Boundary Selection
In most cases, the Outflow node does not require any user input. If required, select the boundaries that are convection-dominated outlet boundaries.
Heat Sink: Application Library path Heat_Transfer_Module/Tutorials,_Forced_and_Natural_Convection/heat_sink
Location in User Interface
Context menus
 Heat Transfer>Outflow
Heat Transfer in Solids>Outflow
Heat Transfer in Fluids>Outflow
Heat Transfer in Porous Media>Outflow
Bioheat Transfer>Outflow
Ribbon
Physics Tab with interface as Heat Transfer, Heat Transfer in Solids, Heat Transfer in Fluids, Heat Transfer in Porous Media, Heat Transfer in Building Materials or Bioheat Transfer selected:
Boundaries>interface>Outflow