Multiple choice

For a two-dimensional irrotational flow, the velocity potential is defined as $\psi$= In(x2+y2). Which of the following is a possible stream function,$\Psi$, for this flow?

  1. $\frac{1}{2}tan^{-1} (y/x)$
  2. $tan^{-1} (y/x)$
  3. $ 2tan^{-1} (y/x)$
  4. $ 2tan^{-1} (x/y)$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation