Question

When a shallow water flowing radially slows down due to______

(a) Friction

(b) Temperature

(c) Pressure

(d) Volume

I have been asked this question by my college professor while I was bunking the class.

Question is taken from Types of Hydraulic Jumps topic in section Non Uniform Flow in Channels of Fluid Mechanics

Answer 1

Correct option is (a) Friction

The best I can explain: The water that flowing radially slows down due to friction in the fluid. This happens as the fluid grows shallower, which keeps it dilatory. Due to this, the Froude number drops to the point where the jump occurs.