0
Piezometric pressure is the simplest form of the hydrostatic equation in fluid mechanics.
Simply put, the hydrostatic equation is the following:
P + (gamma)*z = constant
(I apologize but I wasn't able to insert greek letters.)
where,
P = pressure.
gamma = specific weight (assume constant; fluid is incompressible unless it is a gas)
z = sometimes called piezometric head or pressure head. It is simply the elevation or the vertical distance (height) from a fixed reference point called a datum.
The whole left side expression of the equation is the piezometric pressure, Pz
In order to use this equation in fluid mechanics, you must define 2 points of analysis and plug the variables.
P1 + [(gamma)*z1] = P2 + [(gamma)*z2]
When dealing with a fluid in motion, however, the piezometric pressure is no longer constant in the system. Partial derivatives and acceleration get involved. The resulting equation is know as Euler's Equation.
Hope this is enough help!
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
What is a piezometric pressure?
hydraulic head
How do you calculate pressure ratio of compressor?
Inlet pressure/discharge pressure
What pressure is medium pressure natural gas supplied?
medium pressure
What is difference between pressure reducing valve and pressure relief valve?
pressure relief valve relief the excess pressure which is developed in the syatem, while pressure reducing valve reduces the pressure and supply it to the system.
What is the Difference between an active earth pressure and passive earth pressure?
When the wall moves away from the backfill, the earth pressure on the wall decreases. This minimum pressure is called active earth pressure. On the other hand if the wall moves towards the backfill, the earth pressure increases. This maximum pressure is called passive earth pressure.
What is a piezometric pressure?
hydraulic head
What are the types of piezometers?
A piezometer is a small diameter water well used to measure the hydraulic head of groundwater in aquifers. Similarly, it may also be a tube or manometer used to measure the pressure of a fluid at a specific location in a column. Piezometers should ideally have a very short screen and filter zone, so that they can represent the hydraulic head at a point in the aquifer. If the filter zone is located at a specific isolated depth, the piezometer is defined punctual, or, if the piezometer has a filter on all its length, is defined windowed. The windowed piezometer is cheaper than the punctual one, but cannot give information on vertical flows. The main problem with the piezometers is the time-lag between the variation of piezometric level in the aquifer and the respective variation in the piezometer. This time-lag is related to the piezometer (type, shape, etc.) and the soil. Modern piezometers with little time-lag are the piezometric cells, where the pressure on a membrane is measured by the pressure of gas (pneumatic piezometric cells), by vibrating thread extensimeters or by electrical extensimeters (strain gauges piezometers). Source: http://www.answers.com/piezometers?gwp=11&ver=2.3.0.609&method=3
What is the name for the imaginary line on the same plane as the level of the surface of an open container of water used as a reference for determining elevation head?
The imaginary line on the same plane as the level of the surface of an open container of water used as a reference for determining elevation head is called the hydraulic grade line (HGL). It represents the total energy in a fluid system, including both the pressure head and elevation head. The HGL helps engineers analyze and design systems to ensure water flows properly.
What is the best system for water hammer protection in larger diameter pipes?
The water-hammer in a pump systems is created in the pump zone, so the best way to attack the negative wave pressure that will born there (and travel along the pipe, back and forth) is by injecting fluid, so that it counteracts the fall in the pressure in a good deal. This has no relation to the diameter of the pipe. Of course, the larger the diameter, the more water will have to be injected, but it won´t change your protecting device. The only ones who inject water as soon as the water hammer occurs are the pressure vessels and an air chamber (open to atmosphere), as long as the latter is located at the pump zone. But for this it would have to very high (for the water level in it to reach the piezometric line since its open to atmosphere) leaving it as a non-usual option. That´s why pressure vessels are so used.
What is the surface between the zone of aeration and the zone of saturation called?
The Water Table. The term Piezometric, or sometimes Potentiometric, Surface occurs in literature on hydrology but describes an artificial level in a well or borehole, used for measuring the aquifer.
What is the difference between energy line and energy grade line?
Difference between energy line and energy grade lineThe line showing the total energy at any point in a pipe. The total energy in the flow of the section with reference to a datum line is the sum of the elevation of the pipe centerline, the piezometric height (or pressure head), and the velocity head. The energy grade line will slope (drop) in the direction of flow except where energy is added by mechanical devices. The line representing the elevation of the total head of flow is the energy line. The slope of the line is known as the energy gradient
What is the total pressure gauge pressure plus atmospheric pressure?
Total pressure is equal to the sum of gauge pressure and atmospheric pressure. Atmospheric pressure is always present and contributes to the total pressure measurement.
What does absolute pressure include that gauge pressure does not?
abosulute pressure includes the atmospheric pressure while gage pressure gives the pressure above atmospheric pressure
When you take a persons blood pressure it is a reflection of lymphatic pressure arterial pressure osmotic pressure or venous pressure?
arterial pressure
Is absolute pressure static pressure?
Yes, absolute pressure is the pressure measured with respect to a vacuum, while static pressure is the pressure exerted by a fluid due to its motion or position. While they are related, they are not the same as static pressure does not take into account the atmospheric pressure.
What is intrathoracic pressure?
Intrathoracic pressure is the pressure inside of the pleural cavity. It is also called intrapleural pressure and the normal pressure is called negative pressure.
What are the types of pressure?
They're 5 Kinds of Peer Pressure These are it ~ Negative Peer Pressure , Positive Peer Pressure , Heavy Peer Pressure , Indirect Peer Pressure , and Friendly Peer Pressure
