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Reynolds number

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Reynolds number

Number used in fluid mechanics to determine whether fluid flow in a particular situation (through a pipe or around an aircraft body or a fixed structure in the sea) will be turbulent or smooth. The Reynolds number is calculated using the flow velocity, density, and viscosity of the fluid, and the dimensions of the flow channel. It is named after Irish engineer Osborne Reynolds.

The Reynolds number for the wing of a Boeing 747 is 7 × 107 and that for a nuclear submarine is 109.
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In particular, the researchers found that a mixing flow in the outer core with magnetic Reynolds number in the range of 200, which they suggest is a physically reasonable range, could account for the historically measured rate of decrease of the geomagnetic dipole moment.
Mixing in Earth's outer core causes geomagnetic dipole to collapse by Asian News International
Phelps has a high Reynolds number in the pool, exceeding 1 million, meaning that his strokes create sufficiently powerful inertia to carry him through the water, and viscosity is not overwhelmingly important.
Microswimmers make a splash: tiny travelers take on a viscous world by Sanders, Laura / Science News
capillary number Ca and Reynolds number Re can be defined as follows: Ca = [mu][V.
Start-up of slot die coating by Chang, Yi-Rong; Lin, Chi-Feng; Liu, Ta-Jo / Polymer Engineering and Science
 
 
 
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