![]() Nibler.Įxperiments in Physical Chemistry, 6th ed. Determining the viscosity of an unknown fluid.Lower viscosity at a higher temperature follows.Cone and plate viscometer showed a larger.Capillary viscometer simpler and more accurate.Both viscometers straightforward once set up.Unknown fluid determined to be Brookfield Fluid.Motor speed (RPM) Viscosity Reading (cP) Viscosity (cP) Brookfield cone and plate viscometer with coneĪverage Time (sec) Density (g/mL) Viscosity (cP).(1) Standard deviation (2) Propagated error Second term neglected for sufficiently long times.Measure torque needed to overcome viscous.Adjust cup so pins barely not making contact.Circulating bath to keep constant temperature.Shallow angled cone in very close proximity with.Time fluid falling between two fiducial marks (a).Select appropriate capillary size to give.Non-Newtonian Fluids are usually complex mixtures.Independent of pressure except at very high. ![]() Additional forces between molecules but exact.Molecular diffusion between layers of flow. ![]()
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