# Continuity Equation

1. Aug 18, 2008

### Gear2d

For the continuity equation (Q= Av, A is cross sectional area, v is velocity), is it independent of the radius of the pipe? If so, why?

2. Aug 18, 2008

### Defennder

Well, is A independent of the pipe radius?

3. Aug 18, 2008

### GT1

A=$$\Pi$$*R^2

4. Aug 19, 2008

### Troponin

The cross-sectional area is dependent on the radius.

The velocity must increase as the radius decreases to allow the same volume of fluid to pass through over a given time.