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Results tagged with Search options user 12951

The quantitative study of how fluids (gases and liquids) move.

2
votes
Try to eliminate your initial hypothesis by using dimensional analysis to make a quantitative estimate based on variables you can observe and measure easily. You should be able to estimate a Strouhal …
answered Jun 18 '13 by Mark Rovetta
1
vote
Molecules of water (H2O) are polar, they are small electric dipoles. In the interior of a volume of some liquid water (pure), the molecules can arrange themselves to minimize the electric fields. At …
answered Dec 3 '12 by Mark Rovetta
1
vote
Yes I think it makes sense when the surface boundary layer is so thin that it can be neglected. You are assuming no drag or friction by the surface on the fluid. Or you are assuming the viscosity of t …
answered Nov 2 '12 by Mark Rovetta
0
votes
1answer
How fast does the water travel down river when the discharge gates of a large dam are opened? Can the discharge-wave travel downstream faster than the water? Is this likely to occur for a real river …
asked Jan 3 '14 by Mark Rovetta
0
votes
The Manning Formula is an empirical equation that describes uniform open channel flow. It depends upon several factors, including roughness and sinuosity of the river channel. This paper: The Colorad …
answered Jan 6 '14 by Mark Rovetta
40
votes
4answers
Is it possible to constrain the height, volume flow, or distance of a waterfall from the quantitative analysis of a high-quality recording of its sound? As an aside, the simulated sounds of fluid spl …
asked Jan 3 '13 by Mark Rovetta
6
votes
2answers
On a calm smooth lake, or even a large rain puddle, I've seen transient rough patches on the surface suddenly appear and disappear, and sometimes move across the water some distance before disappearin …
asked Jan 30 '13 by Mark Rovetta
7
votes
Your professor is correct, but I agree with you that the statement “vorticity can’t be destroyed or created” seems jarring - I would prefer to think of this as “vorticity is conserved” because the con …
answered Apr 24 '13 by Mark Rovetta
0
votes
Most of the energy of a tsunami wave is gravitational energy. It is the rise in sea level, and the retreat of the surge, which is most devastating. Our cities are vulnerable because we build right to …
answered Mar 29 '14 by Mark Rovetta
1
vote
The classic Poisseuille flow approach is a fine approximate solution for situations that satisfy its assumptions. The effect of gravity can be accounted for well by including it in the pressure-drop …
answered Feb 15 '13 by Mark Rovetta