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1.Find the Reynolds number if a fluid of viscosity 0.4 Ns/m2 and relative density of 900 kg/m3 through a 20 mm pipe with a velocity of 2.5 m/s. Is the flow Laminar or Turbulent? Note: If Reynolds < 2000 the flow is laminar If Reynolds > 4000 the flow is turbulent If 2000 < Re < 4000 it is transitional flow Re = ρVL/η < 10^3 shows viscous force dominate. That is, viscous forces keep streamlines constant so they flow steadily over each other in predictable path. Re = Reynolds 2. At what temperature on the Fahrenheit scale will the temperature on a centigrade scale be three times that on a Fahrenheit scale? |
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