If the Level Set Model node is a domain feature under The Level Set Interface, it adds the following transport equation governing a level set function ϕ:

If it is a domain subfeature under the Porous Medium domain feature, it adds the following equation:

In both cases, the Level Set Model node provides the options to define the associated level set parameters and the velocity field.

Enter a value or expression for the Reinitialization parameter γ (SI unit: m/s). The default is 1 m/s.

Enter a value or expression for the Parameter controlling interface thickness εls (SI unit: m). The default expression is ls.ep_default, a value proportional to the maximum element size with a proportionality factor dependent on the ratio of the maximum and minimum element sizes in the domain.

Enter values or expressions for the components (u, v, and w in 3D, for example) of the Velocity field u (SI unit: m/s). The applied velocity field transports the level set function through convection.