Principle

Due to internal friction among their particles, liquids and gases have different viscosities. The viscosity, a function of the substance’s structure and its temperature, can be experimentally determined, for example, by measuring the rate of fall of a ball in a tube filled with the liquid to be investigated.

Benefits


Viscosity measurement for two fluids and any mix ratio

Viscosity measurement for different temperatures possible

Angle of falling ball viscometer can be changed

Interdisciplinary use also in applied sciences or physical chemistry


Tasks

Measure the viscosity


of methanol-water mixtures of various composition at a constant temperature,

of water as a function of temperature and

of methanol as a function of temperature.


From the temperature dependence of the viscosity, calculate the energy barriers for the displace ability of water and methanol.

What you can learn about


Liquid

Newtonian liquid

Stokes law

Fluidity

Dynamic and kinematic viscosity

Viscosity measurements