Question

A combination of velocity potential (φ) and stream function (ψ) is called ___________

(a) Velocity potential

(b) Seepage pressure

(c) Complex potential

(d) Hydraulic gradient

I had been asked this question in exam.

This interesting question is from Two Dimensional Flow : Laplace Equation topic in chapter Seepage Analysis of Geotechnical Engineering I

Answer 1

The correct answer is (c) Complex potential

To explain I would say: A combination of φ and ψ is called as complex potential (w) and is defined by the equation: w=φ +i ψ.