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Unformatted text preview: 2.EXPERIMENTAL METHODS In the Viscosity Measurement Techniques experiment, three methods used in viscosity determination are learned. These are: 1- Capillary Flow Method( The Ostwald- Fenske Viscometer) 2- Falling Ball Method (Hoeppler Method) 3- Rotating Shaft Viscometer( HAAKE) 2.1. Capillary Flow Method In the Ostwald- Fenske Viscometer, as shown in figure 2.1, the time taken for a solution of a known volume to flow through a vertical capillary with gravity is noted and compared with a standard sample (Generally water as the viscosities and densities are known for various temperatures.). The equipments used in this method are an Ostwald- Fenske Viscometer, a constant temperature water bath, stopwatch, distilled water, glycerol (20%, 40%, and 60%), thermocouples and a thermometer. Before the experiment all the equipment should be cleaned and the impurities should be gone using chromic acid and distilled water. Also the viscometer should be calibrated with a liquid of known density and viscosity (e.g. water) .Then from the larger capillary arm of the viscometer 10 ml known density and viscosity (e....
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This note was uploaded on 05/01/2011 for the course CHE che 320 taught by Professor Ahmetarslan during the Spring '11 term at Middle East Technical University.
- Spring '11