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Space rate of variation of pressure in a given direction
In hydrodynamics and hydrostatics, the pressure gradient (typically of air but more generally of any fluid) is a physical quantity that describes in which
Pressure_gradient
Pressure gradient in which pressure increases in the direction of fluid flow
In fluid dynamics, an adverse pressure gradient is a pressure gradient in which the static pressure increases in the direction of the flow. Mathematically
Adverse_pressure_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
Aerodynamic instability in axial or centrifugal compressors
The pressure in the reservoir keeps increasing and then exceeds the pressure at compressor exit, thus resulting in an adverse pressure gradient in exit
Surge_in_compressors
Model used in computational fluid dynamics
shown experimentally to be reduced for flows containing large adverse pressure gradients[citation needed]. The k-ε model also performs poorly in a variety
K-epsilon_turbulence_model
Boundary layer that forms on a wedge
corresponds to an adverse pressure gradient (often resulting in boundary layer separation) while m > 0 represents a favorable pressure gradient. In 1937 Douglas
Falkner–Skan_boundary_layer
Model of viscous fluid flow between two surfaces moving relative to each other
} The pressure gradient can be positive (adverse pressure gradient) or negative (favorable pressure gradient). In the limiting case of stationary plates
Couette_flow
Pressure exerted by circulating blood upon the walls of arteries
blood pressure. Blood pressure varies over longer time periods (months to years) and this variability predicts adverse outcomes. Blood pressure also changes
Blood_pressure
Layer of fluid in the immediate vicinity of a bounding surface
skin friction also causes it to be badly affected by adverse pressure gradients. As the pressure begins to recover over the rear part of the wing chord
Boundary_layer
Airfoil designed primarily to delay the onset of wave drag in the transonic speed range
condition. However, if AOA is increased to the stalling point, an adverse pressure gradient builds, and a shockwave can form within the thin boundary layer
Supercritical_airfoil
Dimensionless parameter to quantify fluid resistance
to adverse pressure gradients at the top and rear parts of an airfoil. As a result, wake formation occurs, leading to eddy formation and pressure loss
Drag_coefficient
Type of aerodynamic or hydrodynamic drag
reduction of skin friction by riblets under the influence of an adverse pressure gradient". Experiments in Fluids. 15 (1): 17–26. Bibcode:1993ExFl...15
Skin_friction_drag
Plane wing that angles backwards or forwards
conditions around the rest of the aircraft, and as the flow enters an adverse pressure gradient in the aft section of the wing, a discontinuity emerges in the
Swept_wing
One-equation turbulence model for computational fluid dynamics
it gives good results for flows subject to slowing pressure, known as adverse pressure gradients. Because of its robustness, it is also gaining popularity
Spalart–Allmaras turbulence model
Spalart–Allmaras_turbulence_model
Dimensionless group in fluid mechanics
velocity profile. There will be an adverse pressure gradient generated from the curvature with an increase in pressure, therefore a decrease in velocity
Dean_number
negative). This appears to be the case for interior flow with an adverse pressure gradient (APG). Integrand values do not change sign in standard probability
Boundary_layer_thickness
Concept in aerodynamics
surface of the airfoil, which can induce flow separation and adverse pressure gradients on the aft portion of the wing. This effect requires that aircraft
Drag-divergence_Mach_number
Fluid dynamics control in engineering
control the boundary layer separation that occurs due to the adverse pressure gradient. Rotation of the cylinder can reduce or eliminate the boundary
Boundary_layer_control
Turbulence model
of the k-omega turbulence model and improve the predictions of adverse pressure gradients. The formulation of the SST model is based on physical experiments
Menter's Shear Stress Transport
Menter's_Shear_Stress_Transport
Use of mathematical models to simulate turbulent flow
been shown to give good results for boundary layers subjected to adverse pressure gradients. It is also gaining popularity in turbomachinery applications
Turbulence_modeling
Advances in Theoretical and Mathematical Physics Advection Adverse pressure gradient Adverse yaw Ady Stern Aeolipile Aeroacoustics Aerobraking Aerocapture
Index_of_physics_articles_(A)
Excess accumulation of fluid in the brain
osmolality pressure gradient between the brain and the surrounding vasculature. As cerebral edema is linked to increased intracranial pressure (ICP), many
Cerebral_edema
Part of a surfboard
speeds, the turbulent boundary layer helps the flow overcome an adverse pressure gradient and allows the fin to remain attached to the surface longer than
Surfboard_fin
Fan that induces gas flow mostly parallel to the shaft
discharge side. When the impeller blades are not rotating these adverse pressure gradients pump the flow in the direction opposite to the direction of the
Axial_fan_design
Compression garment
blood to pool in the feet. There are two types of compression stockings, gradient and anti-embolism. Treatment is usually prescribed by a physician to relieve
Compression_stockings
trailing edge of the airfoil causes a reduction in the lift and adverse pressure gradients compared to the steady case at the same AoA; By virtue of a kinematic
Dynamic stall on helicopter rotors
Dynamic_stall_on_helicopter_rotors
Substance that promotes the production of urine
urine in the loop of Henle (which usually uses the high osmotic and solute gradient to transport solutes and water). Further, the limited tubular epithelial
Diuretic
Central nervous system stimulant
(drowsiness/fatigue), and dizziness. Cardiac adverse effects may include palpitations, changes in blood pressure and heart rate (typically mild), and tachycardia
Dexmethylphenidate
Theoretical modelling of decompression physiology
given pressure exposure profile. Decompression involves a complex interaction of gas solubility, partial pressures and concentration gradients, diffusion
Decompression_theory
Flow of fluids with zero viscosity (superfluids)
Separation of the boundary layer usually occurs where the pressure gradient reverses from favorable to adverse so it is inaccurate to use inviscid flow to estimate
Inviscid_flow
Loop diuretic medication
kidney disease. Furosemide may also be used for the treatment of high blood pressure. It can be taken intravenously or orally. When given intravenously, furosemide
Furosemide
Medical condition of lack of oxygen in the tissues
the lung alveoli according to a concentration gradient, also referred to as a partial pressure gradient. Inhaled air rapidly reaches saturation with water
Hypoxia_(medicine)
Fracturing bedrock by pressurized liquid
is controversial, or the injection pressure applied (whether the treatment is above or below the fracture gradient, as shown in the flow chart above)
Fracking
Heart disease with narrowing of valve
creating a pressure gradient across the mitral valve. This gradient may be increased by increases in the heart rate or cardiac output. As the gradient across
Mitral_stenosis
Engine that uses steam to perform mechanical work
as its working fluid. The steam engine uses the force produced by steam pressure to push a piston back and forth inside a cylinder. This pushing force can
Steam_engine
Chemical compound
exercise intolerance, they do not reduce resting LV intraventricular pressure gradients and often are inadequate to control symptoms. Many investigators and
Disopyramide
MRI safety and risk factors
the right humerus. — FDA, MAUDE Adverse Event Report The rapid switching on and off of the magnetic field gradients is capable of causing nerve stimulation
Safety of magnetic resonance imaging
Safety_of_magnetic_resonance_imaging
Medical treatment at raised ambient pressure
lungs. The improved concentration gradient for inert gas elimination (oxygen window) by using a high partial pressure of oxygen increases the rate of inert
Hyperbaric_medicine
Enlargement of the heart muscle
A8V, A31S, C84Y and D145E. Ventricular hypertrophy causes a dynamic pressure gradient across the left ventricular outflow tract (LVOT), which is associated
Hypertrophic_cardiomyopathy
Insertion of a catheter into a chamber or vessel of the heart
across the valve and measuring the pressures simultaneously on each side of the valve to obtain the pressure gradient. In conjunction with a right heart
Cardiac_catheterization
Loss of traction due to water buildup under tires
and grade is called drainage gradient or "resulting grade". Most road design manuals require that the drainage gradient in all road sections must exceed
Aquaplaning
Lack of sodium in blood with a low plasma osmolality
pressure pushing water out or the brain begins to herniate out of the skull - a likely fatal occurrence. Symptoms of hyponatremia exist on a gradient
Hypotonic_hyponatremia
Diuretic that reduces the reabsorption of water and sodium
intravascular compartment. Mannitol lowers intracranial pressure by two mechanisms. A osmotic gradient across the blood-brain barrier causes movement of water
Osmotic_diuretic
Rate of change in elevation between the two rails or edges of a road
navigate curves at higher speeds without risk of overturning and reduces the pressure of the wheel flanges against the rails, minimizing friction and wear. The
Cant_(road_and_rail)
Short-term state of the atmosphere
surface air pressure. The resulting horizontal pressure gradient moves the air from higher to lower pressure regions, creating a wind, and the Earth's rotation
Weather
Anti-inflammatory drug
hypertension (high blood pressure) Concomitant administration of lithium salts (such as lithium carbonate) In general, the adverse effects of indometacin
Indometacin
Central nervous system stimulant
(drowsiness/fatigue), and dizziness. Cardiac adverse effects may include palpitations, changes in blood pressure and heart rate (typically mild), and tachycardia
Methylphenidate
Type of aqueduct built in ancient Rome
recommends a low gradient of not less than 1 in 4800 for the channel, presumably to prevent damage to the structure through erosion and water pressure. This value
Roman_aqueduct
Medical device for restricting blood flow
minimizing tourniquet pressure and pressure gradients. Tourniquet pressure and pressure gradients can be minimized by using a tourniquet pressure based on the
Tourniquet
Fluid dynamics physicist
Self-preserving development within turbulent boundary layers in strong adverse pressure gradients (1965) The response of a turbulent boundary layer to abrupt changes
Albert_Alan_Townsend
Chemical compound
(hydrogen cations) across biological membranes. It dissipates the proton gradient across the mitochondrial membrane, collapsing the proton motive force that
2,4-Dinitrophenol
Component of railway rolling stock
express trains without continuous brakes, which – it became clear – in adverse conditions could considerably exceed those assumed when positioning signals
Railway_brake
Mineralocorticoid steroid hormone
since too high a serum content of potassium has very adverse effects on nervous transmission. Pressure-sensitive baroreceptors are found in the vessel walls
Aldosterone
Agents that relax and loosen the bowels and stools
cause the intestines to hold more water, creating an osmotic gradient, which adds more pressure and stimulates bowel movement. Properties Site of action:
Laxative
Chemical compound
19 November 2015. "Nycodenz®: A universal density gradient medium" (PDF). Axis-Shield Density Gradient Media. Archived from the original (PDF) on 26 February
Iohexol
Drug mixture used mainly to treat ADHD and narcolepsy
achievements. The most concerning short-term adverse effects of stimulants, such as elevated blood pressure and heart rate, waned in long-term follow-up
Adderall
Medical issues associated with spaceflight
complex and largely harmful over both short and long term. Significant adverse effects of long-term weightlessness include muscle atrophy and deterioration
Effect of spaceflight on the human body
Effect_of_spaceflight_on_the_human_body
Disease involving heart or blood vessels
probably no additional benefit in terms of mortality and serious adverse events when blood pressure targets were lowered to ≤ 135/85 mmHg from ≤ 140 to 160/90
Cardiovascular_disease
Turbulent movement of transparent air masses
height. Such variations are examples of temperature gradients. A horizontal temperature gradient may occur, and hence air density variations, where air
Clear-air_turbulence
Diving mode and decompression technique
of long term adverse effects on the divers is acceptably low. Most saturation diving is done on heliox mixtures, with partial pressure of oxygen in accommodation
Saturation_diving
Mammalian hormone released from the pituitary gland
duct epithelial cells. Aquaporins allow water to move down their osmotic gradient and out of the nephron, increasing the amount of water re-absorbed from
Vasopressin
Descending below the surface of the water to interact with the environment
on ambient pressure divers. Efficient decompression requires the diver to ascend fast enough to establish as high a decompression gradient, in as many
Underwater_diving
Physiological basis for decompression theory and practice
large changes in ambient pressure. It involves a complex interaction of gas solubility, partial pressures and concentration gradients, diffusion, bulk transport
Physiology_of_decompression
Computational quantum mechanical modelling method to investigate electronic structure
correlation, in order to understand the origin of specific electric field gradients in crystals. DFT sometimes does not properly describe: intermolecular
Density_functional_theory
animals such as fish, that serves to detect movement, vibration, and pressure gradients in their environment. An artificial lateral line is an artificial
Artificial_lateral_line
Use of circular rotational force to mimic gravity
simulated gravity has been proposed as a solution in human spaceflight to the adverse health effects caused by prolonged weightlessness. However, there are no
Artificial_gravity
Diuretics that act along the loop of Henle in the kidneys
positive voltage at the interstitial side with transepithelial voltage gradient of 10 mV. This causes the magnesium and calcium ions to be repelled from
Loop_diuretic
Drug for angina pectoris sold under many brand names
ionic pump activity and the maintenance of transmembrane sodium–potassium gradients. This stabilization of cellular homeostasis helps protect cardiac cells
Trimetazidine
Techniques and procedures for safe decompression of divers
ambient pressure at that depth is low enough to ensure that the tissues are mostly off gassing inert gas, although under a very small pressure gradient. This
Decompression_practice
Agents and situations that pose a threat to the underwater diver
environment and pressure changes, particularly pressure changes during descent and ascent, and breathing gases at high ambient pressure. Diving equipment
Diving_hazards
Class of medication
trials found that SGLT-2 inhibitors reduce the risk for three-point major adverse cardiovascular events (MACE), especially in subjects with an estimated
SGLT2_inhibitor
Nursing specialty in hyperbaric oxygen therapy
handle each adverse event appropriately. The most common adverse effect is middle ear barotrauma, injury to the middle ear due to pressure not being equalised
Hyperbaric_nursing
Method of heat exchange in which convection drives pumpless circulation
boilers and furnaces. Thermosiphoning also occurs across air temperature gradients such as those occurring in a wood-fire chimney or solar chimney. This
Thermosiphon
Aquatic or submarine environment
of breathing gases in the tissues over time, and can lead to a range of adverse effects, such as inert gas narcosis, and oxygen toxicity. Decompression
Underwater_environment
Influences of the underwater environment on the physiology of human divers
partial pressures and concentration gradients, diffusion, bulk transport and bubble mechanics in living tissues. Gas is breathed at ambient pressure, and
Human physiology of underwater diving
Human_physiology_of_underwater_diving
CNS stimulant and isomer of amphetamine
achievements. The most concerning short-term adverse effects of stimulants, such as elevated blood pressure and heart rate, waned in long-term follow-up
Dextroamphetamine
Collecting energy from external sources
external sources (e.g., solar power, thermal energy, wind energy, salinity gradients, and kinetic energy, also known as ambient energy), then stored for use
Energy_harvesting
Central nervous system stimulant prodrug
achievements. The most concerning short-term adverse effects of stimulants, such as elevated blood pressure and heart rate, waned in long-term follow-up
Lisdexamfetamine
Pathological, often painful, involuntary muscle contraction
adverse muscular effects, including cramps; the rate appears to be approximately 10–25% in a typical statin-using population. In some cases, adverse effects
Skeletal_muscle_cramp
Sudden temporary weakening of the heart muscle
adrenaline surge triggers the arteries to tighten, thereby raising blood pressure and placing more stress on the heart, and may lead to spasm of the coronary
Takotsubo_cardiomyopathy
Body of water in flat, low-lying areas
/ˈbaɪ.oʊ/, although that pronunciation is declining. Bayous form in low-gradient coastal and river delta landscapes where water moves slowly and sediment
Bayou
However, as shown, it raises when the upward pressure gradient in downward-curving flow adds to atmospheric pressure at the paper lower surface. b. Babinsky
List of common misconceptions about science, technology, and mathematics
List_of_common_misconceptions_about_science,_technology,_and_mathematics
Organisms that live at the bottom of a water column
organic enrichment or other contaminants gradients, macrobenthos have to make some reactions to resist such adverse environmental conditions. Therefore, macrobenthic
Macrobenthos
Human heart defect present at birth
progresses and the pressure in the right side of the heart becomes greater than the left side of the heart. This reversal of the pressure gradient across the
Atrial_septal_defect
Meteorological concept
the distance between the cyclone center and the system's greatest pressure gradient. Using weather satellite data, the distance between the coldest cloud
Radius_of_maximum_wind
Central nervous system stimulant
achievements. The most concerning short-term adverse effects of stimulants, such as elevated blood pressure and heart rate, waned in long-term follow-up
Amphetamine
Thin, film-like structure separating two fluids, acting as a selective barrier
or passive. The latter can be facilitated by pressure, concentration, chemical or electrical gradients of the membrane process. Microfiltration removes
Membrane
Equipment used by divers to facilitate decompression
Reducing the partial pressure of the inert gas component of the breathing mixture will accelerate decompression as the concentration gradient will be greater
Decompression_equipment
Organic compound involved in immune responses
adverse reactions (such as flush, itching, rhinitis, etc.) to ingested histamine in food. The mainstream theory accepts that there may exist adverse reactions
Histamine
Abnormally high tissue carbon dioxide levels
arterial partial pressure of carbon dioxide ( P a C O 2 {\displaystyle {P_{a_{CO_{2}}}}} ) causes changes in brain activity that adversely affect both fine
Hypercapnia
Mixture formation system
rapid, inhomogeneous mixture formation. This creates large stratification gradients, with a central region that has a very low air ratio and outer regions
Gasoline_direct_injection
Passenger plane crash in Nepal
it added additional pressure to pilot in command during the flight. They were flying in high altitude and difficult route in adverse weather conditions
Tara_Air_Flight_197
Treatment of cancer using drugs that inhibit cell division or kill cells
tumor cells. This phenomenon further promotes heterogeneity and produces a gradient in the microenvironment that fosters the positive selection of a drug-resistant
Chemotherapy
Death of a region of brain cells due to poor blood flow
glucose which powers the ion pumps maintaining these gradients. As a result, the transmembrane ion gradients run down, and glutamate transporters reverse their
Stroke
Non-airbreathing engine used to propel a missile or vehicle
lowered working tensile strength. In addition, significant temperature gradients are set up in the walls of the chamber and nozzle, these cause differential
Rocket_engine
Use of oxygen as a medical treatment
physiologic effects on the human body. Whether or not these effects are adverse to a patient is dependent upon clinical context. Cases in which an excess
Oxygen_therapy
Closed power plant in Pennsylvania, US
rates and proximity (OR = 1.4; 95% CI = 1.3, 1.6). After adjusting for a gradient in cancer risk prior to the accident, the odds ratio contrasting those
Three Mile Island Nuclear Generating Station
Three_Mile_Island_Nuclear_Generating_Station
Removing positive ions from hard water
precipitation. Reverse osmosis uses an applied pressure gradient across a semipermeable membrane to overcome osmotic pressure and remove water molecules from the
Water_softening
Absence of the sensation of weight
environment, gravity exerts a downward force, setting up a vertical hydrostatic gradient. When standing, some 'excess' fluid resides in vessels and tissues of the
Weightlessness
Skin sore sustained by a vasculatory disease
heart failure. Venous stasis causes the pressure in veins to increase. The body needs the pressure gradient between arteries and veins for the heart
Venous_ulcer
ADVERSE PRESSURE-GRADIENT
ADVERSE PRESSURE-GRADIENT
Girl/Female
Hindu
Shapely, Diverse, Changed
Girl/Female
Tamil
Shapely, Diverse, Changed
Girl/Female
Arabic, Muslim, Sindhi
Treasure of Heaven; Treasure
Boy/Male
British, English
From the Priest's Meadow
Boy/Male
Hindu, Indian
Advise
Girl/Female
Indian
Verse
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
Hindu
Verse
Boy/Male
Tamil
Pleasure
Boy/Male
Tamil
Advise
Boy/Male
Hindu, Indian
Advise
Boy/Male
Native American
tree.
Boy/Male
Bengali, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Oriya, Telugu
Advise; King
Boy/Male
Tamil
Treasure
Girl/Female
Muslim
Verse
Boy/Male
Tamil
Treasure
Girl/Female
Tamil
Treasure
Boy/Male
Tamil
Khazana | க஼ஜ஼ாநாÂ
Treasure
Khazana | க஼ஜ஼ாநாÂ
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
Verse
ADVERSE PRESSURE-GRADIENT
ADVERSE PRESSURE-GRADIENT
Boy/Male
French
Lucky.
Boy/Male
Hindu, Indian
Lord Vishnu
Girl/Female
Arabic, Muslim
Gainer; Winner
Boy/Male
Hindu
Beautiful
Boy/Male
Indian
Very Pleasing
Girl/Female
Tamil
Tejaswita | தேஜஸà¯à®µà¯€à®¤à®¾
Brightness
Girl/Female
Hindu
Goddess Parvati, The first sound of universe aum called as Pranavi
Surname or Lastname
English
English : variant of Blaisdell.
Surname or Lastname
English, Scottish, and Irish
English, Scottish, and Irish : nickname from Middle English boner(e), bonour ‘gentle’, ‘courteous’, ‘handsome’ (Old French bonnaire, from the phrase de bon(ne) aire ‘of good bearing or appearance’, from which also comes modern English debonair).Welsh : Anglicized form of Welsh ap Ynyr ‘son of Ynyr’, a common medieval personal name derived from Latin Honorius.Swedish : unexplained.
Girl/Female
Muslim
Light, Bright
ADVERSE PRESSURE-GRADIENT
ADVERSE PRESSURE-GRADIENT
ADVERSE PRESSURE-GRADIENT
ADVERSE PRESSURE-GRADIENT
ADVERSE PRESSURE-GRADIENT
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.
n.
Urgency; as, the pressure of business.
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.
v. t.
To give or afford pleasure to; to please; to gratify.
a.
Provided or bound with a tressure; arranged in the form of a tressure.
n.
That which is inverse.
a.
Acting against, or in a contrary direction; opposed; contrary; opposite; conflicting; as, adverse winds; an adverse party; a spirit adverse to distinctions of caste.
a.
The back side; as, the reverse of a drum or trench; the reverse of a medal or coin, that is, the side opposite to the obverse. See Obverse.
n.
The act of pressing, or the condition of being pressed; compression; a squeezing; a crushing; as, a pressure of the hand.
a.
Inverted; having a position or mode of attachment the reverse of that which is usual.
a.
Pressing; urgent; also, oppressive; as, pressive taxation.
a.
In hostile opposition to; unfavorable; unpropitious; contrary to one's wishes; unfortunate; calamitous; afflictive; hurtful; as, adverse fates, adverse circumstances, things adverse.
a.
Fig.: Urgent; intense; as, a high-pressure business or social life.
a.
Having, employing, or exerting, a low degree of pressure.
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.
n.
Pressure.
adv.
In an adverse manner; inimically; unfortunately; contrariwise.
v. i.
To take pleasure; to seek pursue pleasure; as, to go pleasuring.
a.
Reversed; as, a reverse shell.
imp. & p. p.
of Advert