MECH 361 Lecture Notes - Lecture 13: Viscosity
2 May 2016
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Document Summary
Often capillary tubes are used to measure the viscosity of a fluid. Consider the liquid of unknown viscosity that flows through the tube of diameter 1 mm and length 40 cm shown underneath. The static pressure at station 1 is 102,000 pa while at 2 is 101,000 pa. The o volumetric flow-rate be 0. 2 cm3/s and 800 kg/ m3 respectively. Calculate the viscosity of the liquid. and density have been measured experimentally and found to. Solution: since we are dealing with a capillary tube we are going to assume laminar flow. P = p 1 - p 2 = 64. We have to verify that this flow is indeed laminar: = 3. 1 x 10 - 4 nt s m 2 or pa s. 3. 1 x 10 - 4 nt s m 2. Since re < 2, 300 the flow is laminar.
