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14 sie 2020 · The objectives of this experiment are: (1) to derive an equation to determine the viscosity of a fluid using the Thomas Stormer viscometer, (2) to develop a methodology to calibrate viscosity measurements from a Cole Palmer viscometer, and (3) to recommend the best viscometer for use in measuring the viscosity of oils. Theory
Calculate viscosity coefficient using formula: η = ( m − ρ V ) g π. r. 6 rv ( 1 + 2 .4 ) R where: m – average drop mass, ρ – density of oil equals 0,80 g/cm3, V – average drop volume, g – gravitational acceleration, r – average drop radius, v – average velocity of water drops; diameter of cylinder equal to 2R = 4.5 cm.
4 kwi 2020 · The physicist George Gabriel Stokes derived the following equation, which shows the relationship between the speed v at which a sphere of radius r is drawn through a fluid of viscosity η and the resulting frictional force F f: \begin{align} \label{s} &\boxed{F_f = 6\pi \cdot r \cdot \eta \cdot v} ~~~\text{Stokes’ law of friction} \\[5px]
2.1 Objective: To determine the viscosity of an oil sample expressed as time of flow in Redwood seconds at the specified temperatures and determination of experimental repeatability.
A body moving in a fluid feels a frictional force in a direction opposite to its direction of motion. The magnitude of this force depends on the geometry of the body, its velocity, and the internal friction of the fluid. A measure for the internal friction is given by the dynamic viscosity η.
Measure the viscosity of different fluids using a viscometer and choosing appropri-ate spindle/rotational speed combinations. Develop proportional relationships (qualitative) between the size of the spindle, the rotational speed of the spindle, the viscosity of the fluid and the torque needed to turn the spindle.
The objective of this lab is for you to determine the flow properties of liquid phase materials by measuring the viscosities of a few common fluids. From the results, you will see how the viscosity varies with the concentration of a binary liquid mixture.
