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The limiting case of the Venturi effect is when a fluid reaches the state of choked flow, where the fluid velocity approaches the local speed of sound of the fluid. When a fluid system is in a state of choked flow, a further decrease in the downstream pressure environment will not lead to an increase in velocity, unless the fluid is compressed.
Snow fences work by inducing turbulence in the wind, forcing it to drop much of its snow load near the fence. Bridge supports (piers) in water. When river flow is slow, water flows smoothly around the support legs. When the flow is faster, a higher Reynolds number is associated with the flow.
In common usage, wind gradient, more specifically wind speed gradient [1] or wind velocity gradient, [2] or alternatively shear wind, [3] is the vertical component of the gradient of the mean horizontal wind speed in the lower atmosphere. [4] It is the rate of increase of wind strength with unit increase in height above ground level.
Most lakes in the world occupy basins scoured out by glaciers. Glacial motion can be fast (up to 30 metres per day (98 ft/d), observed on Jakobshavn Isbræ in Greenland) [1] or slow (0.5 metres per year (20 in/year) on small glaciers or in the center of ice sheets), but is typically around 25 centimetres per day (9.8 in/d). [2]
For particles with a small settling velocity, diffusion will increase the complexity of the particle's path to the bottom and the time it takes to settle compared to particles with high settling velocities. The settling velocity (also called the "fall velocity" or "terminal velocity") is a function of the particle Reynolds number.
Snow fell 85 times within ten days of those 642 times — that’s only 13% of the time. Will snow follow a ring around the moon? Another wives’ tale says a lunar halo, or a ring seen around the ...
Measurements of discharge increase during spring and are highest in the summer, during which warmer temperatures promote the additions of meltwater. [7] Meltwater is a major contributor to many glacial stream’s annual water budget. [ 7 ]
The “Chandler Wobble” – a natural shifting of the Earth’s axis due to the planet not being perfectly spherical – could be linked to the spinning speeds, timeanddate.com reported.