Hydraulic Jump Experiment
SUMMARY
The Objective of this experiment is to observe the flow patterns and behaviour of the water before after the jump Also to quantify the energy lost due to a hydraulic jump. The observed and theoretical ratios of upstream and downstream depths will be compared, this will show the limitations to purely theoretical analysis.
The experiment showed that a hydraulic jump occurs when when liquid at high velocity discharges into a zone of lower velocity, a rather abrupt rise occurs in the liquid surface. The rapidly flowing liquid is abruptly slowed and increases in height.
The results clearly show the limitations of purely theoretical and purely experimental analysis due to the range of
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Hydraulic jump occurs when the supercritical flow occurs in a channel of which normal flow condition is subcritical.
h2/h1 = ½ (√(1+8F12 )- 1) (4)
The Froude number is calculated using this equation:
F1 = √(q2/gh12) (5)
The hydraulic jump, also known as standing wave, is a rapid transition from supercritical flow to subcritical flow. The transition is generally a turbulent process with a significant energy loss(∆E). that can not be neglected. A hydraulic jump is commonly used to dissipate energy, and reduce the downstream velocity.
To calculate the specific energy at the two separate heights this equation is used:
E = h1 + q2/2gh12 (6)
The total energy loss can be derived as
ΔE = E1 –E2 (7)
To find the height of the jump between the smallest and largest heights:
Δh = h2 – h1 (8)
Finally, the length of the hydraulic jump is given by:
L = 5Δh (9)
2. EXPERIMENTAL ARRANGEMENT & APPROACH
2.1 Apparatus
7.8cm Wide open Channel
Depth Gauge measurement devices- Point Gauge and Ruler
2.2 How The Experiment Was Carried Out
Start the pump and turn the flow control valve open.
Allow the
The higher the water potential in one location compared to another location, will cause the water and molecules to move from the high potential to the low water potential.
‘Hydraulic fracturing/fracking is the process of injecting liquid at high pressure into subterranean rocks, boreholes, etc. to force open existing fissures and extract oil or gas’ (Oxford dictionaries, 2015).
where A2 is the cross-sectional area of the throat, C is the coefficient of discharge (dimensionless), gc is the dimensional constant, Q is the volumetric rate of discharge measured at upstream pressure and temperature, w is the weight rate of discharge, p1 and p2 are the pressures at upstream and downstream static pressure taps, respectively, Y is a dimensionless expansion factor, β is the ratio of the throat diameter to pipe
WATER JET PUMP In the fig 1.4.1, the mainstream Flow A exists within a pipe. Aside of the pipe a
Blood pressure and water pressure (osmotic) are responsible for creating the movement of fluid across the capillary wall.
Hydraulic fracturing is a controversial practice commonly used by oil and natural gas producers. This practice, better known as “fracking”, is used to stimulate the production of oil by fracturing shale to release natural gas. The birth modern day hydraulic fracturing began as early as the 1940s and today it is widely practiced across the United States, from new york, to Oklahoma, even all the way to California. The process of fracking is fairly simple, hydraulic fracturing (fracking) involves tapping shale and other tight-rock formations by drilling a mile or more below the surface before turning horizontal and continuing to drill several thousand feet more (Energy from Shale 2016). is drilled water is injected at an extremely high rate
This experiment is designed to facilitate an understanding of the principles involved when water flows through a pervious material such as soil.
Hydraulic fracturing is either referred to as “fracking” or “hydrofracking.” It is a generally new technique for oil and gas extraction. Basically for shale gas and tight oil, including cracking of rock by a pressurized fluid. Even penetrating takes into account the infusion of very pressurized fracking liquids into shale rock layers profound inside the earth. After a well is drilled, it is cased with bond trying to guarantee groundwater security and the shale is using pressurized water broke with water, chemicals, sand and other fracking liquids. This makes new channels inside the stone from which natural gas is removed at higher than customary rates.
Hydraulic fracking is a process in which metal pipes are drilled miles deep into the ground. This method uses millions of gallons of water and chemicals which are injected down a pipe, thus causing rock layers called shale to break due to a difference in pressure. Furthermore, the natural gas flows upwards and is obtained to be further burned for human use.
Hydraulic hose – A hydraulic hose is a variety of elastic hose intended for transferring liquid from one place to another within a hydraulic device or equipment.
Hydraulic fracturing or fracking is the process of horizontal drilling past the water table into shale rock about 5,000 to 9,000 feet vertically and up to 10,000 feet horizontally. Then pressurized fracking fluid is pumped into the ground to bring the oil and natural to the surface. In the United States, there are more than 500,000 active natural gas wells.
1. What two parameters are responsible for creating the movement (filtration and reabsorption) of fluid across the capillary wall?
Among those courses, I found the hydraulic ones quite interesting, especially designing different hydraulic structures for various water engineering purposes. Thereafter, hydraulics has become my all-time impressing subject. In fact, its attractiveness motivated me very much to become among the three top students in related courses. Apart from hydraulics theories, I enjoyed the practical courses very much especially my internship in a laboratory where I cooperated a PhD student to conduct experiments on the hydraulic jump over a rough bed. This event ignited my desire for doing my own research and advancing my education to the next level. Therefore, I took the Iranian National Entrance Competition for Master Programs and gained the rank of 23 out of 1710 rivals for Agricultural Engineering-Hydraulic Structures program in 2008. I spent a whole year studying intensively for this competitive exam; however, my enthusiasm helped me win a place with a very good
surface movement initiates the bottom water layers to move as well to the left of the