Use the Monopole Source node to add the domain source term Qm to the governing equation. A monopole source added to a domain has a uniform strength in all directions. In advanced models, this source term can, for example, be used to represent a domain heat source causing pressure variations. Add this node from the More submenu.

Enter a Monopole source Qm (SI unit: 1/s2). The default is 0 1/s2.