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.
Answers: 3
Physics, 22.06.2019 10:20
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Physics, 22.06.2019 12:00
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Physics, 22.06.2019 12:30
An engine undergoes a cycle as shown in the diagram. during a complete cycle the work done by the gas is 28.5×103 j and the energy transferred thermally out is 99.4×103 j. there are 1.5×1024 gas molecules and they have three active degrees of freedom. 6. (6 pts) during which process(es) is energy transferred thermally into the gas? a. 1→2 b. 2→3 c. 4→1 d. 1→2 and 4→1 e. none of the above
Answers: 3
Adimensionless group called the reynolds number (nne) is defined for flow in a pipe or tube re where...
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