You are viewing the documentation for an older COMSOL version. The latest version is available here.
Point Mass Source
The Point Mass Source feature models mass flow originating from an infinitely small domain around a point.
Species Source
Enter the source strength, , for each species (SI unit: mol/s). A positive value results in species injection from the point into the computational domain, and a negative value means that the species is removed from the computational domain.
Point sources located on a boundary or on an edge affect the adjacent computational domains. This has the effect, for example, that the physical strength of a point source located in a symmetry plane is twice the given strength.
Further reading
See the section Mass Sources for Species Transport.