Engineering

Engineering, 11.07.2019 02:20, bellpreslee7115

In flow across the tube banks, the reynolds number is based on the maximum velocity instead of the uniform approach velocity a)-true b)-false

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Engineering, 14.07.2019 01:20, klairecarregal6016

Water (density 1 kg/m^3) at 20 c flows at a reynolds number of 2000 inside a tube with a diameter of 3.66 cm, which is maintained at 70c. the flow velocity is 1 m/s. the heat transfer coefficient w/m^2-k for this flow is a)-500 b)-128.5 c)-50 d)-15 w/m

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Physics, 27.07.2019 01:20, chefjones06p0gvlh

Adimensionless group called the reynolds number (nne) is defined for flow in a pipe or tube re where v is the average velocity in the pipe, ρ is the fluid density, μ is the fluid viscosity, d is the tube diameter. the second form of the group indicates that it is a ratio of the convective (turbulent) momentum flux to the molecular (viscous) momentum flux, or the ratio of inertial forces (which are destabilizing) to viscous forces (which are stabilizing). when viscous forces dominate over inertial forces, the flow is laminar and fluid elements flow in smooth, straight streamlines, whereas when inertial forces dominate, the flow is unstable and the flow pattern breaks up into random fluctuating eddies. it is found that laminar flow in a pipe occurs as long as the value of the reynolds number is less than 2000. calculate the maximum velocity and the corresponding flow rate (in cm3/s) at which laminar flow of water is possible in tubes with the following diameters: d = 0.25, 0.5, 1.0, 2.0, 4.0, 6.0, 10.0 in.

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Engineering, 07.08.2019 00:10, machopr

In flow across the tube banks, the reynolds number is based on the maximum velocity instead of the uniform approach velocity a)-true b)-false

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