Which of the following is not an example of forced vortex flow?
(a) Liquid contained in cylinder rotated about its axis
(b) Flow of liquid inside impeller of a centrifugal pump
(c) Flow of a water through runner of a turbine
(d) Flow of the liquid around a circular bend in a pipe
I got this question during an interview.
The question is from Types of Motion and Vortex Flow topic in section Kinematics of Flow and Ideal Flow of Fluid Mechanics