Description: Rotational $($Rotary$)$ viscometers measure viscosity by rotating a spindle submerged in a fluid at a constant speed and calculating the torque required over time, allowing for time$-$dependent fluid analysis. Digital models are available for low, medium, and high viscosity materials. When selecting a rotational viscometer, it is important to consider the viscosity level, speed, and spindle configuration of the fluid being measured. This will help optimize the sensitivity and accuracy of the measurement. Additional considerations would be unit size and dimensions.

Purpose: The purpose of this lab is to measure the viscosity of a Newtonian fluid using a rotary viscometer.

Objective $1$: To accurately calculate the viscosity of a Newtonian fluid using a rotary viscometer.

Objective $2$: To compare the viscosity values obtained from the rotary viscometer to the theoretical viscosity of the Newtonian fluid.

Objective $3$: Describe your observation of the values of viscosity in different fluids compared to water.

Note: The rotational viscometer schematic is given in the figure below. For the purpose of this lab, the outer radius in$,$ in and in$.$

ESCI $2\mathrm{.}2.$png