What is the term used for a case where source and sink( both of them are of equal magnitude) approach each other such, distance between them reduces and product of distance and discharge magnitude remains constant.
(a) A plain pair
(b) A doublet source in uniform
(c) Hagen Poiseuille flow
(d) Coutte flow
The question was posed to me during an internship interview.
The query is from Important Cases of Super imposed Flow topic in chapter Kinematics of Flow and Ideal Flow of Fluid Mechanics