Re is a non-dimensional number to show the onset of turbulence. pVD Re = Re s 2000 2000 S Re s 3000 Re 2 3000 laminar flow transition flow (unpredictable) turbulent flow VD D- diameter of the conduit (or, characteristic length). v - kinematic viscosity, p- absolute viscosity. The above definition of Reynolds number is given for pipe flow. If it is for airflow (temp = 20°C, v = 1.5x10-5 m?/s) with a velocity of 0.1 m/s over a thin plate of semi-infinite extent, the transition region length over the thin plate will be O Transition region length = 450 m O None of the answers are correct. O Transition region length = 435 m O Transition region length = 15 m ↑ 11

Structural Analysis
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Chapter2: Loads On Structures
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Re is a non-dimensional number to show the onset of turbulence.
pVD
Re =
Re s 2000
2000 S Re s 3000
Re 2 3000
laminar flow
transition flow (unpredictable)
turbulent flow
VD
D- diameter of the conduit (or, characteristic length).
v - kinematic viscosity, p- absolute viscosity.
The above definition of Reynolds number is given for pipe flow.
If it is for airflow (temp = 20°C, v = 1.5x10-5 m?/s) with a velocity of 0.1 m/s over a thin plate of semi-infinite extent, the transition region length over the thin
plate will be
O Transition region length = 450 m
O None of the answers are correct.
O Transition region length = 435 m
O Transition region length = 15 m
↑ 11
Transcribed Image Text:Re is a non-dimensional number to show the onset of turbulence. pVD Re = Re s 2000 2000 S Re s 3000 Re 2 3000 laminar flow transition flow (unpredictable) turbulent flow VD D- diameter of the conduit (or, characteristic length). v - kinematic viscosity, p- absolute viscosity. The above definition of Reynolds number is given for pipe flow. If it is for airflow (temp = 20°C, v = 1.5x10-5 m?/s) with a velocity of 0.1 m/s over a thin plate of semi-infinite extent, the transition region length over the thin plate will be O Transition region length = 450 m O None of the answers are correct. O Transition region length = 435 m O Transition region length = 15 m ↑ 11
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