A localized low-pressure vaporization condition (cavities or bubbles) within a liquid, as around a propeller or within a pipe or in a pump's suction line Bubble collapse creates unwanted sound and/or vibration May be destructive
The formation, in a fluid, of air bubbles that rapidly collapse; especially in a rotating marine propeller
A localized gaseous condition within a liquid stream which occurs where the pressure is reduced to the vapor pressure
the sequential formation and collapse of vapor bubbles and voids in a liquid subjected to acoustic energy at high frequency and intensity (analgous to thermal boiling but without the associated rise in temperature of the mass of liquid, although localized temperatures on the molecular level can be extremely high)
The formation of "voids" or air inside the water stream, caused by low pressure near a surface Encountered when the water separates from the propeller Also called "ventilation"; causes propeller burn, and can lead to "blow-out"
Pop that occurs in a spinal joint when vertebral surfaces (facets) are separated to create a vacuum that puts out carbon dioxide gas
Inefficient low-pressure pockets on propellers form bubbles that collapse against the blades resulting in premature wear
a localized gaseous condition within a liquid stream that occurs where the pressure is reduced to the vapor pressure
the rapid formation and collapse of vapor pockets in a flowing liquid in regions of very low pressure The xylem cells in a seedling cavitate as the seedling fails to take up water under drought conditions See 'plant moisture stress'
The vacuum created when the discharge capacity of the pump exceeds the replacement in the suction line Cavitation occurs when the pump is oversized, when the diameter of the influent line is too small or when there is an excessively long influent line Cavitation causes bubbling and vibrations that can damage the pump if they occur over an extended period
The 'pop' or 'click' heard from a chiropractic adjustment The sound is merely a release of gas from the joints of the spine like cracking your knuckle
Formation of vapour bubbles within a liquid at low-pressure regions that occur in places where the liquid has been accelerated to high velocities, as in the operation of centrifugal pumps, water turbines, and marine propellers. Cavitation is undesirable because it produces extensive erosion of the rotating blades, additional noise from the resultant knocking and vibrations, and a significant reduction of efficiency because it distorts the flow pattern. The cavities form when the pressure of the liquid has been reduced to its vapour pressure; they expand as the pressure is further reduced along with the flow, and they suddenly collapse when they reach regions of higher pressure
The rapid formation and depletion of air bubbles that can damage the material at the solid/liquid interface under conditions of severe turbulent flow
The boiling of a liquid caused by a decrease in pressure rather than an increase in temperature
formation of an air or vapor pocket (or bubble) due to lowering pressure in a liquid, often as a result of the collapse of a vapor bubble Cavitation can occur in a hydraulic system as a result of low fluid levels that draw air into the system, producing tiny bubbles that expand explosively at the pump outlet, causing metal erosion and eventual pump destruction Cavitation can also result when reduced pressure in lubricating dispensing systems forms a void, or cavity, which impedes suction and prevents the flow of greases
A condition which can occur in liquid handling machinery (e g centrifugal pumps) where a system pressure decrease in the suction line and pump inlet lowers fluid pressure and vaporization occurs The result is mixed flow which may produce vibration
(noun) The production of voids in a liquid system due to extreme reduction of internal pressure Collapse of these voids or cavities produces very large impulsive pressure, which can cause considerable damage to nearby surfaces Cavitation is frequent on high speed propeller blades and also occurs in the region of the electrical heating element in a bubble jet (THERMAL IMPULSE) system due to the rapid collapse of the bubbles Cavitation, if prolonged and great enough, will frequently cause destruction, ablation or erosion of a solid surface
The sudden formation and collapse of air bubbles in water due to turbulence If air bubbles pass over the face of the transducer, the signal from the transducer is reflected back by the air bubbles These reflections are very strong and will result in noise which will interfere with bottom, structure and fish signals, making them difficult or impossible to see
The formation of bubbles in a liquid, occurring whenever the static pressure at any point in the fluid flow becomes less than the fluid vapor pressure
Damage can occur in regions associated with steep liquid velocity gradients, where vapour-filled voids may form and collapse supersonically, causing shock waves that damage the metal by severe localised attack through massive momentum transfer to the metal Areas subject to local boiling, and dead-end-locations can be prone to similar damage [back] [top]
Formation of a n air or vapor bubble due to lowering of pressure in a liquid, often as a result of a solid body, such as a propeller or piston, moving through the liquid; also, the pitting or wearing away of a solid surface as a result of the collapse of a vapor bubble Cavitation can occur in a hydraulic system as a result of low fluid levels that draw air into the system, producing tiny bubbles that expand explosively at the pump outlet, causing metal erosion and eventual pump destruction
formation of an air or vapor pocket (or bubble) due to lowering of pressure in a liquid, often as a result of a solid body, such as a propeller or piston, moving through the liquid; also, the pitting or wearing away of a solid surface as a result of the collapse of a vapor bubble Cavitation can occur in a hydraulic system as a result of low fluid levels that draw air into the system, producing tiny bubbles that expand explosively at the pump outlet, causing metal erosion and eventual pump destruction
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