vortex-free

In fluid dynamics, it is often referred to as a vortex-free or irrotational vector field.

In this section, we will introduce a theorem that is derived from the Kelvin-Stokes theorem and characterizes vortex-free vector fields.

This prominent feature acts as an aerodynamic fence vortex generator (without which the wings would be almost vortex-free), and fixed leading edge droop/slat/flap.