# How can I calculate viscosity of water at different temperatures?

Nov 28, 2014

The rate of flow of a liquid through a pipe at a given temperature is:

R =$\frac{p \pi {a}^{4}}{8 \eta l}$

Where p = pressure
a = radius of pipe
l = length of pipe
$\eta$ = coefficient of viscosity.

You would need to measure the rate of flow of water through a pipe of known length and radius at different temperatures at a constant pressure.

The coefficient of viscosity = $\eta$

This will be for a particular value of T.

You would then repeat for different values of T.