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Force resulting from a difference in pressure across a surface
the pressure-gradient force is the force that results when there is a difference in pressure across a surface. In general, a pressure is a force per unit
Pressure-gradient_force
Space rate of variation of pressure in a given direction
Mathematically, it is the gradient of pressure as a function of position. The gradient of pressure in hydrostatics is equal to the body force density (generalised
Pressure_gradient
State of balance between external forces on a fluid and internal pressure gradient
as gravity, are balanced by a pressure-gradient force. In the planetary physics of Earth, the pressure-gradient force prevents gravity from collapsing
Hydrostatic_equilibrium
Air pressure differential between two areas
gas in the higher pressure region will exert a force relative to the region of lowered pressure, referred to as pressure-gradient force. If all gas or fluid
Suction
Apparent force in a rotating reference frame
between the pressure-gradient force acting towards the low-pressure area and the Coriolis force acting away from the center of the low pressure. Instead
Coriolis_force
Energy density associated with a magnetic field
gas molecules. A gradient in field strength causes a force due to the magnetic pressure gradient called the magnetic pressure force. In SI units, the
Magnetic_pressure
Oceanic flow in which the pressure gradient force is balanced by the Coriolis effect
the pressure gradient force is balanced by the Coriolis effect. The direction of geostrophic flow is parallel to the isobars, with the high pressure to
Geostrophic_current
Force distributed over an area
Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure
Pressure
Concept in atmospheric science
would result from an exact balance between the Coriolis force and the pressure gradient force. This condition is called geostrophic equilibrium or geostrophic
Geostrophic_wind
Movement of molecules to lower concentration
Osmotic transport occurs through viscous flow of the solvent under a pressure gradient. Osmosis is a vital process in biological systems, as biological membranes
Osmosis
Measure of misalignment between the gradients of pressure and density in a fluid
a stratified fluid is a measure of how misaligned the gradient of pressure is from the gradient of density in a fluid. In meteorology, a baroclinic flow
Baroclinity
Theorerical model of air flow in the atmosphere
associated with the pressure gradient force that results from a high pressure system over the eastern Pacific Ocean, and a low pressure system over Indonesia
Walker_circulation
Variation in pressure as a function of elevation
as well, and these variations have relevance in the context of pressure gradient force and its effects. However, the vertical variation is especially
Vertical_pressure_variation
Vector difference of geostrophic wind movement at high and low altitudes
balance between the Coriolis force and the pressure-gradient force develops. Intuitively, a horizontal difference in pressure pushes air across that difference
Thermal_wind
Fast-flowing atmospheric air current
direction, and the primary struggle is between the Coriolis force and the pressure gradient force. Balance between these two forces is referred to as geostrophic
Jet_stream
Speed of sound wave through elastic medium
{\displaystyle v\,d\rho =-\rho \,dv} . Per Newton's second law, the pressure-gradient force provides the acceleration: d v d t = − 1 ρ d P d x → d P = ( −
Speed_of_sound
Natural movement of air or other gases relative to a planet's surface
wind component is the result of the balance between Coriolis force and pressure gradient force. It flows parallel to isobars and approximates the flow above
Wind
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
Method to determine where barometric highs and lows are based on wind direction
reversed in the Southern Hemisphere, but the angle between the pressure gradient force and wind is not a right angle in low latitudes. A version taught
Buys_Ballot's_law
components. pressure gradient force (PGF) The force experienced by a unit mass of air in response to differences in atmospheric pressure in either the
Glossary_of_meteorology
a system in which compression due to gravity is balanced by a pressure gradient force Hyperbolic equilibrium point, a mathematical concept in physics[clarification
List_of_types_of_equilibrium
Physical quantity
{g} } This is the general form of Stevin's law: the pressure gradient equals the body force force density field. Let us now consider two particular cases
Hydrostatic_pressure
Inertial wave in rotating fluids
the Coriolis force and pressure gradient. The image on the left sketches fundamental principles of the wave, e.g., its restoring force and westward phase
Rossby_wave
Area with air pressures lower than adjacent areas
low-pressure areas in advance of their associated cold fronts. The stronger the pressure difference, or pressure gradient, between a high-pressure system
Low-pressure_area
Development and strengthening of a tropical cyclone in the atmosphere
non-existent Coriolis force (e.g. near the Equator), the only significant atmospheric forces in play are the pressure gradient force (the pressure difference that
Tropical_cyclogenesis
Type of cyclone
the pressure gradient force (from the pressure at the center of the cyclone compared to the pressure outside the cyclone) and the Coriolis force must
Extratropical_cyclone
Layer of gases surrounding an astronomical body held by gravity
The pressure decreases in altitude, producing a pressure-gradient force. Atmospheric pressure is the force (per unit-area) perpendicular to a unit-area of
Atmosphere
Equations to approximate global atmospheric flow
pressure gradient force, gravity, and viscous friction. Together, they create the forces that accelerate our atmosphere. The pressure gradient force causes
Primitive_equations
Sustainable energy from sea and river water
salinity gradient. One method to utilize salinity gradient energy is called pressure-retarded osmosis. In this method, seawater is pumped into a pressure chamber
Osmotic_power
Type of altitude above mean sea level
pressure gradient force as the gradient of geopotential along a constant-pressure surface, because then it has the properties of a conservative force
Geopotential_height
Model of atmospheric motion
to the lower pressures, the effective pressure vector force is contrary to the pressure gradient, whence the minus sign before the gradient vector. Friction
Balanced_flow
Coordinate system used in fluid dynamics
coordinate surfaces does require additional interpolation of the pressure gradient force, and the smoothing of terrain can often cause it to extend beyond
Sigma_coordinate_system
Difference between the actual wind and the geostrophic wind
Since geostrophy is an exact balance between the Coriolis force and the pressure gradient force, ageostrophic flow reflects an imbalance, and thus is often
Ageostrophy
Condition where the Earth's atmosphere is generally considered to be unstable
the physical forces it is subjected to such as the Coriolis force and pressure gradient force; resulting dynamic lifting and mixing produces cloud, precipitation
Atmospheric_instability
Meteorological observation
vertical, namely perturbation pressure gradient force, buoyancy force and precipitation loading. The pressure gradient force was neglected as it has significant
Convective_storm_detection
Mathematical model in fluid dynamics
although the theoretical justification for doing so is weaker, as the pressure gradient force can significantly alter the fluctuating components. Moreover, for
Mixing_length_model
Atmospheric and ocean flow equations
Coriolis force and horizontal pressure-gradient forces, quasi-geostrophic (QG) motion refers to flows where the Coriolis force and pressure gradient forces
Quasi-geostrophic_equations
Large scale rotating air mass
center, the pressure gradient force (from the pressure in the center of the cyclone compared to the pressure outside the cyclone) and the force from the
Cyclone
Interdisciplinary scientific study of the atmosphere focusing on weather forecasting
the large-scale interaction of the pressure gradient force and the deflecting force. By 1912, this deflecting force was named the Coriolis effect. Just
Meteorology
Large formation of floating ice
water drag, wave radiation force, sea ice drag, and the horizontal pressure gradient force. Icebergs deteriorate through melting and fracturing, which changes
Iceberg
Movement of air
velocimetry Pressure gradient force Sea breeze Turbulent flow Ventilation (architecture) Volumetric flow rate Wind "How Do Air Pressure Differences Cause
Airflow
Boundary separating two masses of air of different densities
southeast. Movement is largely caused by the pressure gradient force (horizontal differences in atmospheric pressure) and the Coriolis effect, which is caused
Weather_front
Specific measurement of liquid pressure above a vertical datum
hydraulic gradient. Even though it is convention to use gauge pressure in the calculation of hydraulic head, it is more correct to use absolute pressure (gauge
Hydraulic_head
Precipitable water Prefrontal trough Pressure falls Pressure gradient Pressure gradient force (PGF) Pressure system Probe PROFS (Prototype Regional
Glossary_of_tornado_terms
mechanisms: Convective entrainment and detrainment Accelerations by the pressure gradient force The net effect of these interacting mechanisms depends on the detailed
Convective_momentum_transport
Transport of dissolved species from the highest to the lowest concentration region
that substance or collection. A gradient is the change in the value of a quantity; for example, concentration, pressure, or temperature with the change
Diffusion
Tropical atmospheric circulation feature
disequilibrium. The broad ascent and descent of air results in a pressure gradient force that drives the Hadley circulation and other large-scale flows
Hadley_cell
Cavity in the solar wind created by Saturn
is present permanently. The contribution of the plasma thermal pressure gradient force may also be significant. In addition, an important contribution
Magnetosphere_of_Saturn
Paleoclimatological hypothesis
experiencing cooler temperatures. The pressure-gradient force dictates that air will travel from regions of high to low pressure. That would have driven the atmospheric
Pangean_megamonsoon
Directional mass flow of oceanic water
regular basis Geostrophic current – Oceanic flow in which the pressure gradient force is balanced by the Coriolis effect Latitude of the Gulf Stream
Ocean_current
Scientific interpretation of tidal forces
points, building up water until the pressure gradient force from the bulging sea surface exactly balances the tractive force field. Melchior, Paul (1983). The
Theory_of_tides
Gradient of electrochemical potential, usually for an ion that can move across a membrane
electrochemical gradient is a gradient of electrochemical potential, usually for an ion that can move across a membrane. The gradient consists of two
Electrochemical_gradient
Detachment of a boundary layer from a surface into a wake
a flow is slowing pressure is increasing. Flowing against an increasing pressure is known as flowing in an adverse pressure gradient. The boundary layer
Flow_separation
Translational forces on bubbles in a sound wave
\nabla } P is the acoustic pressure gradient on the bubble. Assuming a sinusoidal standing wave, the time-averaged pressure gradient over a single acoustic
Bjerknes_force
Net pressure gradient causing cerebral blood flow to the brain
Cerebral perfusion pressure (CPP) is the net pressure gradient causing cerebral blood flow to the brain (brain perfusion). It must be maintained within
Cerebral_perfusion_pressure
Computer vision framework
Gradient vector flow (GVF), a computer vision framework introduced by Chenyang Xu and Jerry L. Prince, is the vector field that is produced by a process
Gradient_vector_flow
Tornadoes that spin in the opposite direction of normal tornadoes
was an F2 on the Fujita Scale. Tornadoes portal Vortex Vorticity Pressure-gradient force (PGF) Rossby number Anticyclonic storm Edwards, Roger. "The Online
Anticyclonic_tornado
Process of moving air in and out of the lungs
is accounted for by a reduction of atmospheric pressure alone (7.1 kPa). The pressure gradient forcing air into the lungs during inhalation is also reduced
Breathing
Force perpendicular to flow of surrounding fluid
path, there is a pressure gradient perpendicular to the flow direction with higher pressure on the outside of the curve and lower pressure on the inside
Lift_(force)
Principle relating to fluid dynamics
caused by pressure gradients. Air is accelerated in the direction of the velocity if the pressure goes down. Thus the decrease of pressure is the cause
Bernoulli's_principle
Change in sea level due to gravity
points, building up water until the pressure gradient force from the bulging sea surface exactly balances the tractive force field. Melchior, Paul (1983). The
Tide
Weather event in California, United States
California. A mercury reading of 0.10 inHg (3.4 hPa)of pressure gradient force (difference of pressure between two points) is typically needed for a 12-mile-per-hour
Great Bakersfield Dust Storm of 1977
Great_Bakersfield_Dust_Storm_of_1977
Law describing the pressure drop in an incompressible and Newtonian fluid
pipes with an oscillating pressure gradient finds applications in blood flow through large arteries. The imposed pressure gradient is given by ∂ p ∂ x = −
Hagen–Poiseuille_equation
formed across Texas and deepened while moving east, a tightening pressure gradient force further strengthened the low-level jet, therefore creating a broad
Meteorological history of the 2011 Super Outbreak
Meteorological_history_of_the_2011_Super_Outbreak
Generalized model of a non-Newtonian fluid
flow only in the horizontal direction (along the pressure-gradient direction), and the pressure gradient and viscous effects are in balance. Then, the Navier-Stokes
Herschel–Bulkley_fluid
Downwards movement of one fluid within another
central Pacific westerly wind anomaly by increasing the eastward pressure gradient force in the atmosphere. NASA. "International Sea Level Satellite Spots
Downwelling
Method of separating particles in a mixture
purifications may be done on the basis of density through equilibrium density-gradient centrifugation. Thus, the differential centrifugation method is the successive
Differential_centrifugation
Sub-field of physics dealing with the atmosphere's structure, composition, and motion
detected as regular but small oscillations in surface pressure with periods of 24 and 12 hours. Daily pressure maxima occur at 10 a.m. and 10 p.m. local time
Atmospheric_physics
Type of climate model
surface pressure and the predicted values of temperature between the surface and the height of interest. Pressure is used to compute the pressure gradient force
General_circulation_model
Waves in the ocean and atmosphere created by bottom irregularities
dispersive waves. This means that not only the Coriolis force and the pressure-gradient force influence the flow, as in geostrophic flow, but also inertia
Topographic_Rossby_waves
Technique in analytical chemistry
(e.g., detecting vitamin D levels in blood serum) purposes. High pressure pumps force mixtures of various solvents (the mobile phase, e.g., water, buffers
High-performance liquid chromatography
High-performance_liquid_chromatography
Scientific instruments
Optical tweezers (originally called single-beam gradient force trap) are scientific instruments that use a highly focused laser beam to hold and move microscopic
Optical_tweezers
direction is governed by a balance of the pressure gradient force, Coriolis force, and drag. A temperature gradient drives a thermal wind which eventually
Climate_of_Triton
Atmospheric wind phenomenon in Eastern Africa
jet to climate change. This studied the pressure gradient force, which could be considered the driving force of the jet. The study found that in two relatively
Turkana_jet
Concept in fluid dynamics
Since a conservative body force is the gradient of some potential function, it has the same effect as a gradient in fluid pressure. It is often convenient
Modified_pressure
Upward force that opposes the weight of an object immersed in fluid
difference results in a net upward force on the object. The magnitude of the force is proportional to the pressure difference, and (as explained by Archimedes'
Buoyancy
Meteorological event
portion of the gulf. Winds will blow from the south due to the pressure gradient force. Typically, during a traditional surge, a large mesoscale convective
Gulf of California moisture surge
Gulf_of_California_moisture_surge
Measure of water potential across a semi-permeable cell membrane
chemical biology, tonicity is a measure of the effective osmotic pressure gradient; the water potential of two solutions separated by a partially-permeable
Tonicity
Pressure between two fluids from forces between the fluids and tube walls
fluids and solid walls of the tube. Capillary pressure can serve as both an opposing or driving force for fluid transport and is a significant property
Capillary_pressure
Hierarchical outline list of articles related to oceanography
and works against an exact balance between the Coriolis force and the pressure gradient force Astrooceanography – The study of oceans outside planet Earth
Outline_of_oceanography
Formula used to model how air pressure varies with altitude
= reference pressure; T M , b {\displaystyle T_{M,b}} = reference temperature (K); L M , b {\displaystyle L_{M,b}} = temperature gradient (K/m), e.g.
Barometric_formula
However, in the case of the South Asia monsoon system, the huge pressure gradient force is induced by the Himalayas and Tibetan Plateau. The Himalaya orogenic
Paleogeography of the India–Asia collision system
Paleogeography_of_the_India–Asia_collision_system
Free-surface, terrain-following, primitive equations ocean model
Shchepetkin, Alexander F. (2003). "A method for computing horizontal pressure-gradient force in an oceanic model with a nonaligned vertical coordinate". Journal
Regional Ocean Modeling System
Regional_Ocean_Modeling_System
When potential energy difference depends only on displacement
buoyant force due to a fluid on a solid object immersed and surrounded by that fluid can be obtained by integrating the negative pressure gradient along
Scalar_potential
ISBN 0-375-70390-X. Department of Atmospheric Sciences (1999-10-04). "Pressure Gradient Force". University of Illinois at Urbana-Champaign. Retrieved 2006-10-20
Glossary of tropical cyclone terms
Glossary_of_tropical_cyclone_terms
Net transport of surface water perpendicular to wind direction
layer is the layer in a fluid where there is a force balance between pressure gradient force, Coriolis force and turbulent drag. It was first described by
Ekman_transport
Deflection of a spinning object moving through a fluid
accelerated by the pressure gradient. A downwards force is acting on the air. Newton's third law predicts that the Magnus force and the downwards force acting on
Magnus_effect
Hydrodynamic feature
thermal bar slope away from the bar, producing a pressure gradient force that when balanced by the Coriolis force produces a cyclonic coastal geostrophic current
Thermal_bar
Type of oceanic eddy
between the horizontal pressure gradient force, arising from differences in densities of the meeting water masses, and the Coriolis force. Due to the turbulent
Cold-core_ring
Meteorological concept
in the tropical regions. The pressure gradients mentioned above can be understood to be smoothed out by pressure gradient forces which in the tropics,
Weak temperature gradient approximation
Weak_temperature_gradient_approximation
potential evaporation potential temperature precipitation pressure gradient pressure gradient force (PGF) pyrocumulus Quantitative precipitation estimation
Index_of_meteorology_articles
force on the diffuse layer generates tangential motion of a fluid with respect to an adjacent charged surface. This force might be electric, pressure
Electrokinetic_phenomena
fluid mechanics, the force density is the negative gradient of pressure. It has the physical dimensions of force per unit volume. Force density is a vector
Force_density
Center of motion of a charged particle
force due to a pressure gradient. Finally, other forces such as radiation pressure and collisions also result in drifts. A simple example of a force drift
Guiding_center
Semi-submersible offshore drilling rig
pathologists determined that Hellevik, being exposed to the highest pressure gradient and in the process of moving to secure the inner door, was forced
Byford_Dolphin
Influence that can change motion of an object
physics, a force is an action that can cause an object to change its velocity or its shape, or to resist other forces, or to cause changes of pressure in a
Force
Force of attraction or repulsion between molecules and neighboring particles
(Independent Gradient Model) methodology. Ionic bonding Salt bridges Coomber's relationship Force field (chemistry) Hydrophobic effect Intramolecular force Molecular
Intermolecular_force
Tendency of a fluid jet to stay attached to a surface of any form
and wall surface pressures of the jet, creating a pressure gradient depending upon h/r, the relative curvature. This pressure gradient can appear in a
Coandă_effect
Relative peak or lull in the sea level pressure distribution
lowers atmospheric pressure near that portion of the Earth's surface. Large-scale thermal lows over continents help create pressure gradients that drive monsoon
Pressure_system
Millennium Prize Problem
medium, density and viscosity are constants. Since only its gradient appears, the pressure p can be eliminated by taking the curl of both sides of the
Navier–Stokes existence and smoothness
Navier–Stokes_existence_and_smoothness
PRESSURE GRADIENT-FORCE
PRESSURE GRADIENT-FORCE
Girl/Female
Tamil
Upkosha | உபà¯à®•à¯‹à®·à®¾
Treasure
Upkosha | உபà¯à®•à¯‹à®·à®¾
Girl/Female
Tamil
Treasure
Surname or Lastname
Swedish
Swedish : unexplained.German : unexplained.English : unexplained.
Girl/Female
Hindu
Treasure
Girl/Female
Indian
Treasure
Girl/Female
Arabic, Muslim, Sindhi
Treasure of Heaven; Treasure
Boy/Male
Tamil
Treasure
Girl/Female
Latin
Grace.
Girl/Female
Indian
Treasure
Boy/Male
Indian
Pleasure
Boy/Male
Indian
Pleasure
Boy/Male
Tamil
Treasure
Boy/Male
British, English
Great
Boy/Male
Tamil
Khazana | க஼ஜ஼ாநாÂ
Treasure
Khazana | க஼ஜ஼ாநாÂ
Boy/Male
Tamil
Pleasure
Boy/Male
British, English
From the Priest's Meadow
Boy/Male
American, British, English
Gray-haired; Son of the Gray Family; Son of Gregory
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.
Male
French
French form of Roman Latin Gratian, GRATIEN means "pleasing, agreeable."
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.
PRESSURE GRADIENT-FORCE
PRESSURE GRADIENT-FORCE
Girl/Female
Indian, Sanskrit
A Female Falcon
Boy/Male
Gujarati, Hindu, Indian
Name of Lord Shiva
Boy/Male
British, Dutch, English, German, Swedish
Strong as a Castle; Powerful Protector; Stronghold
Boy/Male
Hindu, Indian
Flower
Girl/Female
French Latin American Arabic Celtic
Blackbird.
Boy/Male
Teutonic
Rules an estate.
Boy/Male
Anglo, Australian, British, Danish, Dutch, English, Finnish, French, German, Swedish, Swiss
Strength of the Spear; Spear Strong; Spear Rule; Spear Brave
Boy/Male
American, Australian, Biblical, British, Chinese, Czech, Czechoslovakian, Danish, Dutch, English, Finnish, French, German, Hebrew, Indian, Irish, Netherlands, Portuguese, Spanish, Swedish, Swiss
Twin; A Form of Thomas
Female
Italian
Italian and Spanish form of Old Norse Brynhildr, BRUNILDA means "armored warrior woman."Â
Boy/Male
Gujarati, Hindu, Indian
Tears; Tear Drop
PRESSURE GRADIENT-FORCE
PRESSURE GRADIENT-FORCE
PRESSURE GRADIENT-FORCE
PRESSURE GRADIENT-FORCE
PRESSURE GRADIENT-FORCE
a.
Having, employing, or exerting, a low degree of pressure.
n.
A step or raised shelf, as above a sideboard or altar. Cf. Superaltar, and Gradin.
a.
Provided or bound with a tressure; arranged in the form of a tressure.
a.
Fig.: Urgent; intense; as, a high-pressure business or social life.
v. i.
To take pleasure; to seek pursue pleasure; as, to go pleasuring.
n.
Urgency; as, the pressure of business.
n.
A contrasting force or impulse of any kind; as, the pressure of poverty; the pressure of taxes; the pressure of motives on the mind; the pressure of civilization.
a.
Having or involving a pressure greatly exceeding that of the atmosphere; -- said of steam, air, water, etc., and of steam, air, or hydraulic engines, water wheels, etc.
n.
Alt. of Gradine
n.
Pressure.
n.
The rate of increase or decrease of a variable magnitude, or the curve which represents it; as, a thermometric gradient.
v. t.
To give or afford pleasure to; to please; to gratify.
a.
Causing, or giving rise to, pressure or to an increase of pressure; as, pressor nerve fibers, stimulation of which excites the vasomotor center, thus causing a stronger contraction of the arteries and consequently an increase of the arterial blood pressure; -- opposed to depressor.
a.
Moving by steps; walking; as, gradient automata.
a.
Especially, emitting or darting rays of light or heat; issuing in beams or rays; beaming with brightness; emitting a vivid light or splendor; as, the radiant sun.
a.
Rising or descending by regular degrees of inclination; as, the gradient line of a railroad.
a.
Pressing; urgent; also, oppressive; as, pressive taxation.
a.
Giving off rays; -- said of a bearing; as, the sun radiant; a crown radiant.
a.
Beaming with vivacity and happiness; as, a radiant face.
n.
The act of pressing, or the condition of being pressed; compression; a squeezing; a crushing; as, a pressure of the hand.