0
$\begingroup$

For my experiment, I want to investigate the relation between height and velocity using Torricelli's law. I would like to know how I would measure the flow rate from volume in a spouting cylinder.

$\endgroup$
  • $\begingroup$ A calibrated orifice? $\endgroup$ – user207455 Jun 26 at 18:15
  • $\begingroup$ What is a calibrated orifice? $\endgroup$ – Alireza ghasemi Jun 26 at 18:17
  • $\begingroup$ Also is there any other simpler way of measuring flow rate. Since flow rate is volume per second, is there an instrument where I can measure the volume per 5 second. $\endgroup$ – Alireza ghasemi Jun 26 at 18:18
0
$\begingroup$

You can measure the velocity by measuring how far the water jet gets before it strikes the ground.

Flow velocity

Suppose the jet takes a time $t$ to fall the vertical distance $h$ to the ground. This time $t$ will be given by the SUVAT equation:

$$ h = \tfrac{1}{2}gt^2 $$

So:

$$ t = \sqrt{\frac{2h}{g}} $$

Then the horizontal distance travelled is:

$$ s = vt = v\sqrt{\frac{2h}{g}} $$

And we simply rearrange this to get the outflow velocity $v$:

$$ v = s\sqrt{\frac{g}{2h}} $$

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.