If the velocity vector for a two dimensional fluid flow is given by V = (ax + by)i + (cx + dy)j as a function of x and y, the condition for irrotationality of flow is:
1
a = d
2
b = c
3
ab = cx
4
a = c
If the velocity vector for a two dimensional fluid flow is given by V = (ax + by)i + (cx + dy)j as a function of x and y, the condition for irrotationality of flow is: