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безвихревой поток stresses
aerohydr.	streamline motion; streamlined motion
avia.	clean flow; vortex-free flow
el.	vortex-free flow
hydrol.	noneddying flow
Makarov.	potential flow
nautic.	displacement flow (вк)
navig.	streaming flow; streamline flow
oil	irrational flow
shipb.	laminar flow
tech.	irrotational flow; noncirculatory flow; irrotation flow

безвихревой поток: 6 phrases in 4 subjects

Aerodynamics	2
Aerohydrodynamics	2
Energy industry	1
Hydrology	1