Definition of irrotational in English:

irrotational

adjective

Physics
  • (especially of fluid motion) not rotational; having no rotation.

    • ‘In addition, the postulated role of vorticity production near the head is at variance with inviscid, irrotational models.’
    • ‘The fluid is irrotational at all points, except next to a vortex street wake behind the fish.’
    • ‘She told him about an important difference between the irrotational wave he had just described and a rotational wave.’
    • ‘Didn't Rafe understand that an ideal fluid is incompressible and lacks viscosity, and its flow is steady and irrotational?’
    • ‘In essence, 3D flows can be considered as complex combinations of irrotational and rotational strains that vary in space with time.’

Pronunciation:

irrotational

/ˌirōˈtāSH(ə)nl/