Fluid Flow - NCSU

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• Viscosity ( ) of water at 20 °C = 1 cP –Viscosity of water dec. by ~3% for every 1 °C inc. in temp. • Measurement of viscosity –Tube viscometer (Cannon-Fenske) –Rotational viscometer (Brookfield, Haake) –Empirical technique (Bostwickconsistometer) Where is viscosity used? NRe= (Density) (Avg. vel.) (Diameter) / (Viscosity)

  Viscosity, Brookfield