Point Mass Source
The Point Mass Source node models mass flow originating from an infinitely small sphere centered around a point which lies on a layer interface of a layered material.
Interface Selection
Set the interfaces on whose points the Point Mass Source condition should be applied. These can be internal interfaces between layers or the top and bottom surfaces.
The available options in the Apply to list are Top interface (the default setting), Bottom interface, Exterior interfaces, Interior interfaces, All interfaces, and Selected interfaces. With the last option you can select any set of interfaces for a given layered material, by clearing the checkboxes corresponding to layer interfaces where the node should not be applied in the Selection table. The top and bottom interfaces refer respectively to the upside and downside of the boundary, defined from the orientation of the normal vector. You can visualize the selected interfaces by clicking the Layer Cross Section Preview () and Layer 3D Preview () buttons.
For a general description of layer and interface selections, see Layer and Interface Selection Tools in the Heat Transfer Module User’s Guide.
Point Mass Source
Enter a value or expression for the source strength, N0 (SI unit: kg/(s)). A positive value results in mass injection from the point into the computational domain, and a negative value means that the mass is removed from the computational domain.