In the language of flow theory, the vector field is called the infinitesimal generator.
Potential flow theory can also be used to model irrotational compressible flow.
Also, potential flow theory cannot be applied for viscous internal flows.
This hypothesis provided a basis for the multi-step flow theory of mass communication.
Because the flow is irrotational, the wave motion can be described using potential flow theory.
According to the multi-step flow theory, opinion leaders intervene between the "media's direct message and the audience's reaction to that message."
An important factor of the multi-step flow theory is how the social influence is modified.
In the steady-state case, combined with the continuity equation of mass, this can be solved using potential flow theory.
Hence secondary flow theory for small flow turning fails.
Lift can be calculated using potential flow theory by imposing a circulation.