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In fluid mechanics, the height of a liquid column
In fluid mechanics, pressure head is the height of a liquid column that corresponds to a particular pressure exerted by the liquid column on the base of
Pressure_head
Force distributed over an area
distributed. Gauge pressure (also spelled gage pressure) is the pressure relative to the ambient pressure. Various units are used to express pressure. Some of these
Pressure
Concept in hydrology
Hydraulic head or piezometric head is a measurement related to liquid pressure (normalized by specific weight) and the liquid elevation above a vertical
Hydraulic_head
Principle relating to fluid dynamics
1/2ρv2 is dynamic pressure, h = z + p/ρg is the piezometric head or hydraulic head (the sum of the elevation z and the pressure head) and p0 = p + q is
Bernoulli's_principle
Kinetic energy per unit volume of a fluid
for pressure head and hydraulic head. In a venturi flow meter, the differential pressure head can be used to calculate the differential velocity head, which
Dynamic_pressure
Pressure measurement is the measurement of an applied force per unit area by a fluid (liquid or gas) on a surface. Pressure is typically expressed in
Pressure_measurement
Pressure exerted by circulating blood upon the walls of arteries
Blood pressure (BP) is the pressure of circulating blood against the walls of blood vessels. Most of this pressure results from the heart pumping blood
Blood_pressure
Film by Anthony Maras
Pressure is a 2026 war drama film directed and edited by Anthony Maras and written by Maras and David Haig, based on Haig's 2014 stage play, starring Andrew
Pressure_(2026_film)
Term used in fluid dynamics
elevation between the suction point and the discharge point. Pressure head is the difference in pressure between the suction point and the discharge point, expressed
Total_dynamic_head
Quantity in a hydraulic circuit
Technically it is the absolute pressure head minus the vapour pressure of the liquid. The Required NPSH (NPSHR): the head value at the suction side (e.g
Net_positive_suction_head
Device that imparts energy to the fluids by mechanical action
shutoff head like centrifugal pumps. A positive-displacement pump operating against a closed discharge valve continues to produce flow and the pressure in
Pump
Top of a saturated aquifer
settles at the surface where the water pressure head is equal to the atmospheric pressure (where gauge pressure = 0). In soils where capillary action is
Water_table
Part of a turbine
turbines, if the net head is low and if the turbine is installed above the tail race, there can be appreciable loss in available pressure head to power the turbine
Draft_tube
Evolution of water turbine
quantity of water. It was easy to convert high heads to power easily but difficult to do so for low-pressure heads. Therefore, an evolution took place that
Evolution from Francis turbine to Kaplan turbine
Evolution_from_Francis_turbine_to_Kaplan_turbine
Pressure exerted by fluids inside the skull and on the brain
Intracranial pressure (ICP) is the pressure exerted by fluids such as cerebrospinal fluid (CSF) inside the skull and on the brain tissue. ICP is measured
Intracranial_pressure
Unit of pressure
measures of pressure based on the pressure head of water. A centimetre of water is a unit of pressure. It may be defined as the pressure exerted by a
Centimetre or millimetre of water
Centimetre_or_millimetre_of_water
Reduced pressure caused by a flow restriction in a tube or pipe
because of changes in pressure. At the end of the system, a mixture of liquid and gas will appear. See aspirator and pressure head for discussion of this
Venturi_effect
Topics referred to by the same term
losses in the pipe Cylinder head, a part of an internal combustion engine Head (vessel), an end cap on a pressure vessel Head unit, a component of an automobile
Head_(disambiguation)
Underground water-bearing rock
pressure head is equal to atmospheric pressure (where gauge pressure = 0). Unsaturated conditions occur above the water table where the pressure head
Aquifer
English actor (1954–2026)
advertising and voice roles such as Herc Shipwright in BBC Radio 4's Cabin Pressure (2011–2014). His film career included roles in Persuasion (2007), Ghost
Anthony_Head
Capillary-based viscometer
the end of the capillary and open to the atmosphere. In this way the pressure head only depends on a fixed height and no longer on the total volume of
Ubbelohde_viscometer
Long-term high blood pressure in the arteries
high blood pressure, is a long-term medical condition in which the blood pressure in the arteries is persistently elevated. High blood pressure usually does
Hypertension
Region surrounding a well due to groundwater extraction
confined aquifers (artesian), the cone of depression is a reduction in the pressure head surrounding the pumped well. When a well is pumped, the water level
Cone_of_depression
Device that extracts energy from a fluid flow
turbine. A working fluid contains potential energy (pressure head) and kinetic energy (velocity head). The fluid may be compressible or incompressible.
Turbine
Unsaturated aquifer above the water table
atmospheric pressure. Hence, the vadose zone extends from the top of the ground surface to the water table. Water in the vadose zone has a pressure head less
Vadose_zone
Vessel for pressurised gases or liquids
A pressure vessel is a container designed to hold gases or liquids at a pressure substantially different from the ambient pressure. Construction methods
Pressure_vessel
Device involving the flow of liquids through tubes
reduced pressure at the top of the siphon. Then atmospheric pressure was able to push the liquid from the upper reservoir, up into the reduced pressure at
Siphon
Computational technique
into account pressure head, elevation head, and velocity head. (Note, energy and head are synonymous in Fluid Dynamics. See Pressure head for more details
Standard_step_method
Structure collecting an engine's exhaust outlets
system. The lower pressure tail of an exhaust pulse then serves to create a greater pressure difference between the high-pressure head of the next exhaust
Exhaust_manifold
Pumping water backwards through a filter
turbidity is greater than a treatment guideline or when the differential pressure (head loss) across the filter exceeds a set value. Water treatment filters
Backwashing_(water_treatment)
End cap on a cylindrically shaped pressure vessel
A head is one of the end caps on a cylindrically shaped pressure vessel. Vessel dished ends are mostly used in storage or pressure vessels in industry
Head_(vessel)
Difference in pressure between two points of a fluid
Pressure drop (often abbreviated as "dP" or "ΔP") is defined as the difference in total pressure between two points of a fluid carrying network. A pressure
Pressure_drop
Force opposing the flow of fluid through pipes
Back pressure (or backpressure) is the term for a resistance to the desired flow of fluid through pipes. Obstructions or tight bends create backpressure
Back_pressure
Change of shape of geological salt bodies submitted to stress
_{s}} is the density of the salt and g is the gravity acceleration. Pressure head are expressed as P over ρ s g {\displaystyle \rho _{s}g} . As P is also
Salt_deformation
1981 single by Queen and David Bowie
"Under Pressure" is a song by the British rock band Queen and singer David Bowie. Released as a single in October 1981, it was later included on Queen's
Under_Pressure
Representation of water movement in unsaturated soils
the volumetric water content [1]; h {\displaystyle h} is the liquid pressure head, which is negative for unsaturated porous media [L]; K ( h ) {\displaystyle
Richards_equation
experience rapid leadership turnover due to sustained counterterrorism pressure. "Head of Islamic State in Afghanistan killed, government says". Reuters.
Abu_Saad_Erhabi
Term used in several scientific disciplines
indicates the location where the pore water pressure is under atmospheric conditions (i.e., the pressure head is zero). This surface usually coincides with
Phreatic
Discharge pressure (also called high side pressure or head pressure) is the pressure generated on the output side of a gas compressor in a refrigeration
Discharge_pressure
Technology used in oil and gas wells
at high pressure into the bottom portion of the grease head to counteract the remaining well pressure. Pack-off subs utilize hydraulic pressure on a two
Wireline_(cabling)
Turbomachinery Equation in Fluid Dynamics
supply; Ht : theoretical head pressure; g: gravitational acceleration For the case of a Pelton turbine the static component of the head is zero, hence the equation
Euler's pump and turbine equation
Euler's_pump_and_turbine_equation
Type of turbine
low-head hydro sites. All common water machines until the late 19th century (including water wheels) were basically reaction machines; water pressure head
Water_turbine
Machine that converts the energy of flowing or falling water into useful forms of power
{\displaystyle h=} head (m) h p = {\displaystyle h_{p}=} pressure head, the difference in water levels (m) h v = {\displaystyle h_{v}=} velocity head (m) k = {\displaystyle
Water_wheel
Water channel controlled at its head by a gate
controlled by the pressure head across it; operation is similar to that of a check valve. It is a gate hinged at the top. When pressure is from one side
Sluice
Pressure limit
static head pressure. The equipment designer needs to account for the higher pressures occurring at some components due to static head pressure. Relief
Maximum allowable operating pressure
Maximum_allowable_operating_pressure
Difference between systolic and diastolic blood pressure
Pulse pressure is the difference between systolic and diastolic blood pressure. It is measured in millimeters of mercury (mmHg). It represents the force
Pulse_pressure
Influencing peers to conform
Peer pressure is a direct or indirect influence on peers, i.e., members of social groups with similar interests and experiences, or social statuses. Members
Peer_pressure
Abnormally low blood pressure
also known as low blood pressure, is a cardiovascular condition characterized by abnormally reduced blood pressure. Blood pressure is the force of blood
Hypotension
Ratio of static enthalpy change within a turbomachine to that of the whole stage
the ratio of the change in static pressure in the rotating blades of a compressor or turbine, to the static pressure change in the compressor or turbine
Degree_of_reaction
Skin damage resulting from long-term pressure
Pressure ulcers, also known as pressure sores, bed sores or pressure injuries, are localised damage to the skin and/or underlying tissue that usually occurs
Pressure_ulcer
2013 British TV series or programme
four head-to-head contests, with each team sending a different player other than their captain into every contest. The players face off on the Pressure Pad
Pressure_Pad
Type of electric gas-discharge lamp
wavelength near 589 nm. Two varieties of such lamps exist: low pressure, and high pressure. Low-pressure sodium lamps are highly efficient electrical light sources
Sodium-vapor_lamp
Negative-pressure mechanical respirator
respiratory muscles. The patient's head is exposed outside the cylinder, while the body is sealed inside. Air pressure inside the cylinder is cycled to
Iron_lung
Topics referred to by the same term
retention curve, relationship between soil water content and water pressure head Water retention on mathematical surfaces, topographic surfaces with
Water_retention
Medical condition
the head fixed in one position, and may also occur in chronically ill persons after prolonged bed rest in one position that causes persistent pressure on
Pressure_alopecia
Medical maneuver
Cricoid pressure, also known as the Sellick manoeuvre or Sellick maneuver, is a technique used in endotracheal intubation to try to reduce the risk of
Cricoid_pressure
Adjustable gate used to control water flow
damage structures. Other design requirements include taking into account pressure head operation, the flow rate, whether the valve operates above or below
Floodgate
Type of fuel metering system for piston aircraft engines
A pressure carburetor is a type of fuel metering system manufactured by the Bendix Corporation for piston aircraft engines, starting in the 1940s. It is
Pressure_carburetor
Ability of water to flow through a porous material
without adding any water, so the pressure head declines as water passes through the specimen. The advantage to the falling-head method is that it can be used
Hydraulic_conductivity
Mechanical fan that forces fluid to move radially outward
cross section leading to the formation of eddy, which in turn reduces pressure head. Friction and flow separation losses also occur due to the volute passage
Centrifugal_fan
Measurement unit for pressure
1 inAq ≈ 0.036 lbf/in2, or 27.7 inAq ≈ 1 lbf/in2. Pressure head Barometer Millimetre of mercury "My pressure gauge is scaled in 'inches' - what does this mean
Inch_of_water
2011 studio album by Rival Sons
Pressure & Time is the second studio album by American rock band Rival Sons. It was released on June 20, 2011, in the UK and was released in the United
Pressure_&_Time
Theorem in fluid mechanics
Oseen flow Pascal's law Poiseuille's law Potential flow Pressure Static pressure Pressure head Relativistic Euler equations Reynolds decomposition Stokes
Torricelli's_law
Abnormal increase in cerebrospinal fluid in the ventricles of the brain
change in head size. Since there is limited expansion of the skull, symptoms are more representative of the effects of increased intracranial pressure (ICP)
Hydrocephalus
Traditional unit of pressure
units Inch of mercury Outline of the metric system Pascal (unit) Pressure head Pressure Devices similar to the modern barometer, using water instead of
Torr
Mechanical ventilation in which airway pressure is always above atmospheric pressure
Positive airway pressure (PAP) is a form of non-invasive respiratory support that delivers pressurized air through a facial or nasal interface to keep
Positive_airway_pressure
Thermodynamic process that uses energy sources to heat water
produces a fairly steady supply of DHW (domestic hot water) at low static pressure head but usually with a good flow. In most other parts of the world, water
Water_heating
Type of commercial fission reactor
(each rated at 35,400 US gallons per minute (2.23 m3/s) for a discharge pressure head of 865 feet (264 m)), and a flow control valve (adjustable from 22%
GE_BWR
Pressure applied to the front of the ear canal
Tragal pressure is pressure that is applied to the cartilage at the front, or anterior aspect of the ear canal (called the tragus), closing the canal and
Tragal_pressure
2013 studio album by Devour the Day
Time & Pressure is the debut studio album by American rock band Devour the Day, which consists of former Egypt Central members Joey Walser and Blake Allison
Time_&_Pressure
Discharge Head, is the net head obtained at the outlet of a pump. For a centrifugal pump, the discharge pressure depends on the suction or inlet pressure as
Centrifugal pump selection and characteristics
Centrifugal_pump_selection_and_characteristics
Anti-personnel mine
can be divided into two half with one half contain the pressure switch with its pressure head that triggers the mine put between two wooden block the
Mine_A.P._Improvised_Type_II
Musical artist
Daniel Smith (born 19 December 1977), better known by his stage name Pressure, is an Australian rapper who serves as one of the MCs of the hip hop group
MC_Pressure
Drop in blood pressure when standing up or sitting down
commonly known as headrush, is a medical condition wherein a person's blood pressure drops (hypotension) when they are standing up (orthostasis) or sitting
Orthostatic_hypotension
Method for matching variable production with demand
ground level, and the hydrostatic pressure (head) of the water column above the storage vessel maintains the pressure at the desired level. This configuration
Compressed-air_energy_storage
Scientific instrument used to measure atmospheric pressure
barometer is a scientific instrument that is used to measure air pressure. Pressure tendency, which is derived from barometric readings, can forecast
Barometer
Form of body alteration
is done by distorting the normal growth of a child's skull by applying pressure. Flat shapes, elongated ones (produced by binding between two pieces of
Artificial cranial deformation
Artificial_cranial_deformation
American adult animated sitcom
"Patsies", "Choke", "Blood Pressure", "Lightning Strikes" Law-Abiding Citizens (1997) Contains: "Generation in Crisis", "Citizen Butt-Head", "Sexual Harassment"
Beavis_and_Butt-Head
Naturally-pressurized water source
equilibrium with atmospheric pressure). Aquifers recharge when the water table at its recharge zone is at a higher elevation than the head of the well. The first
Artesian_well
Component at the surface of a well
at the surface of an oil or gas well that provides the structural and pressure-containing interface for the drilling and production equipment. The primary
Wellhead
Fluid flow that occurs due to heterogeneous fluid properties and body forces
transfer Laser-heated pedestal growth Natural ventilation Nusselt number Pressure head Thermomagnetic convection Vortex tube Convective mixing Prout, William
Convection
Provides water at nearly constant temperature
A pressure-balanced valve provides water at nearly constant temperature to a shower or bathtub, despite pressure fluctuations in either the hot or cold
Pressure-balanced_valve
Sub-discipline of civil engineering
this equation gives you the pressure head p ρ g = y {\displaystyle {\frac {p}{\rho g}}=y} . Four basic devices for pressure measurement are a piezometer
Hydraulic_engineering
Medical condition
elevated cerebrospinal fluid pressure. The fluid build-up causes the ventricles to enlarge and the pressure inside the head to increase, compressing surrounding
Normal_pressure_hydrocephalus
Seal between engine block and cylinder head
or lose pressure at the junction of the engine block and the cylinder head. The head gasket is the seal that prevents these leaks and pressure losses.
Head_gasket
Ocean current
side increases sea level and so reduces the normal Pacific-to-Indian pressure head reducing the flow. Global-scale, ocean waves such as equatorial/coastal
Indonesian_Throughflow
Anthony Stewart Head (1954–2026) was an English film, television, voice, stage and radio actor. He was best known for his roles as Rupert Giles in Buffy
Anthony_Head_filmography
Method of cataract surgery
supply pressure, fluid enters the anterior chamber at a rate proportional to the rate at which it leaves due to aspiration and leakage. The pressure head is
Phacoemulsification
Dam-like structure
systems are similar to a hydro dam that produces static head or pressure head (a height of water pressure). When the water level outside of the basin or lagoon
Tidal_barrage
the pipe will not occur. A curve used to display the amount of back pressure (head loss, feet) that a given circulating pump would be able to overcome
Glossary of geothermal heating and cooling
Glossary_of_geothermal_heating_and_cooling
Pressure of groundwater held within a soil or rock, in gaps between particles
soil. Pressure develops due to: Water elevation difference: water flowing from a higher elevation to a lower elevation and causing a velocity head, or with
Pore_water_pressure
Stress test with different levels of stress in each perpendicular direction
direct contact with the upped pressure head of the specimen. Deformation transducers are attached directly to the piston heads as well. Control of the apparatus
Triaxial_shear_test
Plasma in which the pressure equals that of the surrounding atmosphere
Atmospheric-pressure plasma (or AP plasma or normal pressure plasma) is a plasma in which the pressure approximately matches that of the surrounding atmosphere
Atmospheric-pressure_plasma
Collection of symptoms
information, head and or neck pains, and eye pain. Brain fag was believed to be most common in adolescents and young adults due to the pressure occurring
Brain_fag_syndrome
term symbolizing a change (Δ) in pressure (P). Young–Laplace equation Given that the head loss hf expresses the pressure loss Δp as the height of a column
ΔP
Type of intracranial bleeding that occurs within the brain tissue itself
hemorrhage. The biggest risk factors for spontaneous bleeding are high blood pressure and amyloidosis. Other risk factors include alcoholism, low cholesterol
Intracerebral_hemorrhage
Medical condition
stretching as the ventricles enlarge. Reported causes of low-pressure hydrocephalus include head trauma, tumours, intracranial haemorrhage, meningitis, whole-brain
Low_pressure_hydrocephalus
Equations of motion for viscous fluids
{\textstyle {\frac {p}{\rho }}} is called the unit pressure head. In incompressible flows, the pressure field satisfies the Poisson equation, ∇ 2 p = − ρ
Navier–Stokes_equations
Medical technology
pressure ventilator (NPV) is a type of mechanical ventilator that stimulates an ill person's breathing by periodically applying negative air pressure
Negative_pressure_ventilator
2010 studio album by Darren Styles
Feel the Pressure is the second studio album by Darren Styles. It was released on 23 August 2010.[citation needed] Styles' previous album Skydivin' (2008)
Feel_the_Pressure
PRESSURE HEAD
PRESSURE HEAD
Boy/Male
Indian
Pleasure
Surname or Lastname
English (Bristol, Gwent)
English (Bristol, Gwent) : from Middle English tresor ‘treasure’, ‘wealth’, ‘riches’ (Old French trésor, from Latin thesaurus ‘hoard’), hence a metonymic occupational name for a treasurer or person in charge of financial administration, or an affectionate nickname for a loved or valued person.
Girl/Female
Tamil
Abhirathi | அபிரதீ
Pleasure
Abhirathi | அபிரதீ
Boy/Male
Tamil
Treasure
Girl/Female
Arabic, Muslim, Sindhi
Treasure of Heaven; Treasure
Girl/Female
Indian
Treasure
Girl/Female
Indian
Treasure
Girl/Female
Muslim
Treasure
Girl/Female
Tamil
Treasure
Boy/Male
Tamil
Pleasure
Girl/Female
Tamil
Upkosha | உபà¯à®•à¯‹à®·à®¾
Treasure
Upkosha | உபà¯à®•à¯‹à®·à®¾
Boy/Male
Tamil
Khazana | க஼ஜ஼ாநாÂ
Treasure
Khazana | க஼ஜ஼ாநாÂ
Boy/Male
Indian
Pleasure
Boy/Male
Tamil
Treasure
Boy/Male
British, English
From the Priest's Meadow
Surname or Lastname
English
English : nickname from Old French prestre ‘priest’.German : derogatory nickname for a bully or tyrant, from an agent noun derivative of pressen ‘to oppress’.Jewish (Ashkenazic) : occupational name for someone who did ironing, from Yiddish pres ‘flat iron’ + the agent noun suffix -er.
Girl/Female
Muslim
Treasure
Girl/Female
Muslim
Treasure
Girl/Female
Hindu
Treasure
Boy/Male
Hindu
Pleasure
PRESSURE HEAD
PRESSURE HEAD
PRESSURE HEAD
PRESSURE HEAD
PRESSURE HEAD
PRESSURE HEAD
PRESSURE HEAD