Line Mass Source
This feature is only available in a limited set of add-on products. See http://www.comsol.com/products/specifications/ for more details on availability.
The Line Mass Source feature models mass flow originating from a tube or line region with an infinitely small radius.
For the “Reacting Flow in Porous Media, Diluted Species” interface, which is available in some add-on products, the Line Mass Source node is available in two versions, one for the fluid flow (Fluid Line Source) and one for the species (Species Line Source).
Selection
The Line Mass Source feature is available for all dimensions, but the applicable selection differs between the dimensions.
Model Dimension
Applicable Geometrical Entity
2D
Points
2D Axisymmetry
Points not on the symmetry axis and the symmetry axis
3D
Edges
Species Source
Enter the source strength, , for each species (SI unit: mol/(m·s)). A positive value results in species injection from the line into the computational domain, and a negative value means that the species is removed from the computational domain.
Line sources located on a boundary affect the adjacent computational domains. This effect makes the physical strength of a line source located in a symmetry plane twice the given strength.