# Rotational flow

1. Nov 19, 2005

### techick

I don't have any idea on part b and c.
Anyone would show me how to do them?

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2. Nov 26, 2005

### Astronuc

Staff Emeritus
How was the first part answered, and does one see any relevancy to the subsequent questions?

For a two-dimensional incompressible flow in the x,y plane, the conservation of mass (continuity) equation can be written as,

$$\frac{\partial u}{\partial x}\,+\,\frac{\partial v}{\partial y} = 0$$

and since the flow is rotational,

$$\nabla\times\nabla\phi\,\neq\,0$$

where $\phi$ = velocity potential.

Last edited: Nov 26, 2005
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