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Unformatted text preview: The Falling Ball Method makes use of the Stokes formula for determination of liquid viscosities. We use the formula = t.( b r ).B for calculating viscosities of 20%, 40% and 60% (V/V) glycerin-water solutions. We use Ball 1 for this experiment which has properties of b = 2.392 and B = 0.3325. We prepare Table 3 by using glycerin-water solution properties at 298 K. 4.3 Rotating Shaft Viscometer (HAAKE): Rotating Shaft Viscometers are used for fast comparison tests on liquid viscosities. In this experiment, we use a viscometer with rotor 4 for finding viscosity of 40% (V/V) glycerin-water solution. We read the viscosity value as glycerin = 4.17*10-3 Pa.s 8 Table 3: Experimental results on falling ball method (V/V) % glycerin (kg / m 3 ) t avg. (s) glyce. * 10 3 (Pa.s) * 10 6 (m 2 /s) 20 1040 4.53 2.04 1.962 40 1108 7.40 3.16 2.852 60 1180 21.9 8.83 7.483...
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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