Difference between revisions of "Hydraulic jump"
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(Created page with 'A hydraulic jump in the river A hydraulic jump is a discrepancy in water levels. When water in a stream flows over a rock, the water m…') |
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| − | [[File:Hydraulicjump.jpg| | + | [[File:Hydraulicjump.jpg|300px|thumb|left|A hydraulic jump in the river]] |
| − | A hydraulic jump is a discrepancy in water | + | A hydraulic jump is a discrepancy in water depths. When water in a stream flows over a rock, the water may reach supercritical speed - that is, the speed of the water may exceed the speed that waves propagate at. If so, there will be a sudden change in the water's height so that the speed of the water is reduced to subcritical speed. |
The equation that governs this phenomena is: | The equation that governs this phenomena is: | ||
| − | <math>H_2 | + | <math>\frac{H_2}{H_1} = \frac{1}{2}(\sqrt{8{F_1^2} + 1} - 1)</math> |
| − | where <math>F_1 = | + | where <math>F_1 = \sqrt{g}{Y_1}</sqrt></math> |
F_1 is called the Froude number, g is the acceleration due to gravity, and Y_1 is the depth of the water. | F_1 is called the Froude number, g is the acceleration due to gravity, and Y_1 is the depth of the water. | ||
Revision as of 01:41, May 30, 2010
A hydraulic jump is a discrepancy in water depths. When water in a stream flows over a rock, the water may reach supercritical speed - that is, the speed of the water may exceed the speed that waves propagate at. If so, there will be a sudden change in the water's height so that the speed of the water is reduced to subcritical speed.
The equation that governs this phenomena is:
where 
F_1 is called the Froude number, g is the acceleration due to gravity, and Y_1 is the depth of the water.
