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Topic: Bernoulli effect

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	Contact Cleaning Solutions from Teknek
		Bernoulli explained that there is a reduction in pressure exerted by a fluid due to its flow.
		This means that many small particles held within the boundary layer will never be lifted using moving air systems, despite the Bernoulli effect, as the air stream will physically not be able to touch them or cannot reach the velocity required within the boundary layer to produce lift-off from the surface.
		However the boundary layer effect prevents the creation of the differential air pressure around smaller particles and consequently these are left on the surface.
	www.contact-cleaning.com (888 words)

	Bernoulli's principle - Wikipedia, the free encyclopedia
		Bernoulli's principle states that in fluid flow, an increase in velocity occurs simultaneously with decrease in pressure.
		This principle is a simplification of Bernoulli's equation which states that the sum of all forms of energy in a fluid flowing along an enclosed path (a streamline) is the same at any two points in that path.
		The Bernoulli equation for incompressible fluids can be derived by integrating the Euler equations, or applying the law of conservation of energy in two sections along a streamline, ignoring viscosity, compressibility, and thermal effects.
	en.wikipedia.org /wiki/Bernoulli's_principle (1339 words)

	Magnus effect - Encyclopedia, History, Geography and Biography
		The Magnus effect is the name given to the physical phenomenon whereby an object's rotation affects its path through a fluid, in particular, air.
		It is a product of various phenomena including the Bernoulli effect and the formation of boundary layers in the medium around moving objects.
		It is worth noting, however, that the Magnus effect is not responsible for the movement of a cricket ball seen in swing bowling.
	www.arikah.net /encyclopedia/Magnus_effect (753 words)

	Bernoulli and Newton
		The proponents of the arguments usually fall into two camps: (1) those who support the "Bernoulli" position that lift is generated by a pressure difference across the wing, and (2) those who support the "Newton" position that lift is the reaction force on a body caused by deflecting a flow of gas.
		Bernoulli's equation, which was named for Daniel Bernoulli, relates the pressure in a gas to the local velocity; so as the velocity changes around the object, the pressure changes as well.
		The simultaneous conservation of mass, momentum, and energy of a fluid (while neglecting the effects of air viscosity) are called the Euler Equations after Leonard Euler.
	www.grc.nasa.gov /WWW/K-12/airplane/bernnew.html (1026 words)

	Jef Raskin - Coanda Effect: Understanding Why Wings Work
		The reasoning--though incomplete--is based on the Bernoulli effect, which correctly correlates the increased speed with which air moves over a surface and the lowered air pressure measured at that surface.
		Because the surface of the ball is rough, the effect of viscous forces is to create a thin layer of air which rotates with the surface.
		The experiments with the miniature wind tunnel described earlier are readily understood in terms of the Coanda effect: the downward-curved wing entrained the airflow to move downward, and a force upward is developed in reaction.
	jef.raskincenter.org /published/coanda_effect.html (4907 words)

	Physics at Minnesota: Bernoulli Effects
		Bernoulli’s Principle, when the speed of a fluid is increased the pressure in the fluid decreases, can be illustrated using the air from a leaf blower or a vacuum cleaner.
		Bernoulli's (ber-nool'-ee) principle, states that as the velocity of fluid flow increases the pressure produced by the fluid decreases.
		This is another demonstration of Bernoulli’s Principle where an area of higher speed fluid is used to lower the pressure and the visible movement of two plastic pop bottles is used to show the results.
	www.physics.umn.edu /outreach/pforce/Bernoulli.html (2840 words)

	Bernoulli effect transducer coupler - Patent 4975794
		This creates a negative pressure between the Bernoulli plate and the flexible disk which tends to pull the disk close to the plate and cause the disk to "fly" or become "stabilized" as these terms are used in the art, in a predictable planar relationship with respect to the Bernoulli surface.
		In Bernoulli systems, head crashes that cause loss of data and possible damage to the drive of the system are protected against because the record media generally flies beneath the head and would fall away from the head with any disruption.
		The bernoulli equations show that when a stationary and moving object are placed in close proximity to each other, a negative pressure is generated in the gap between the objects which has the effect of drawing the objects toward one another.
	www.freepatentsonline.com /4975794.html (4871 words)

	Aerodynamic Lift, Bernoulli Effect, Reaction Lift
		The Bernoulli Lift for practical aircraft wings does not produce such great amounts of lift, but that phenomenon is naturally stable (therefore far safer) because the amount of Bernoulli Lift created is fairly constant for various wing angles.
		Reaction Lift is the effect of the pressure of moving fluid (air, in this case) against the bottom of a tilted surface.
		For this effect to exist, the wing or your hand must be tilted upward, at an angle that is called the "angle of attack".
	mb-soft.com /public2/lift.html (4571 words)

	American Antigravity - Bernoulli Effect Thrust Enhancer
		This type of propulsion requires no moving parts, and is believed to be created solely on the basis of an interaction between the high-voltage components of the Lifter and the surrounding vacuum-properties of the environment.
		This type of propulsion would consist of the Biefeld-Brown effect acting as an enhancer on existing ion-wind effects to create a more efficient methd of displacing air by changing the dynamics of the ion-wind interaction.
		While the movement of the air due to high-voltage charge transfer in the LIfter does demonstrate that an atmospheric effect is producing some measure of thrust, the Biefeld-Brown effect may still be producing a considerable amount of thrust in the Lifter as a method of pure "Field-Effect Propulsion".
	www.americanantigravity.com /bernoulli.html (591 words)

	Physics of flight - revisited
		The explanation of the aerodynamic lift in textbooks is based on Bernoulli’s law and the velocity distribution of the streaming air passing an airfoil.
		Finally Bernoulli’s law is applyed to the different flow velocities at the upper and lower side of the wing resulting in a lower pressure at the upper surface and a higher pressure at the lower surface.
		In any case it was necessary that the explanation of lift using Bernoulli’s law had to be complemented by giving a cause for the higher streaming velocity of the wing’s upper surface.
	www.rz.uni-frankfurt.de /~weltner/Flight/PHYSIC4.htm (2788 words)

	BBC - h2g2 - Bernoulli's Principle
		Daniel Bernoulli, a Swiss scientist of the 18th Century, studied the relationship of fluid speed and pressure.
		Bernoulli's Principle is a consequence of the conservation of energy.
		Bernoulli's Principle accounts for the fact that passing ships run the risk of a sideways collision.
	www.bbc.co.uk /dna/h2g2/A517169 (1420 words)

	Halfbakery: Bernoullimobile
		The Bernoulli effect is fairly weak, and it's difficult to demonstrate it in its 'pure' form.
		Although the Bernoulli effect is often cited as the cause of aerofoil life, it is a minor component.
		It would suggest to me that the Bernoulli effect is sort of as I had imagined, and that the plate on the top of Freefall's moving car would indeed experience a measurable reduction in pressure (as he said in his last anno).
	www.halfbakery.com /lr/idea/Bernoullimobile (5055 words)

	Bernoulli equation for incompressible, smooth fluid flow.
		In 1738 Daniel Bernoulli (1700-1782) formulated the famous equation for fluid flow that bears his name.
		The Bernoulli Equation is a statement derived from conservation of energy and work-energy ideas that come from Newton's Laws of Motion.
		Equation (11) is commonly referred to as Bernoulli's equation.
	www.4physics.com /phy_demo/bernoulli-effect-equation.html (398 words)

	Bernoulli's Law -- from Eric Weisstein's World of Physics
		Bernoulli's law describes the behavior of a fluid under varying conditions of flow and height.
		The effect described by this law is called the Bernoulli effect, and (1) is sometimes known as Bernoulli's equation.
		Although it is not a new principle, it is an expression of the law of conservation of mechanical energy in a form more convenient for fluid mechanics.
	scienceworld.wolfram.com /physics/BernoullisLaw.html (279 words)

	Fluent NEWS - Winter 2001 - Shower Curtain Grabs Scientist – But He Lives to Tell Why (Site not responding. Last check: 2007-10-28)
		According to Bernoulli's equation, the static pressure in a fluid decreases as the fluid velocity increases.
		The low pressure at the center of the vortex, reminiscent of the low pressure at the center of a hurricane, was found to be lower than that caused by the Bernoulli effect alone.
		While it is cert ainly a combination of the vortex, Bernoulli effect, and buoyancy that lead to t he curtain behavior in a hot shower, Schmidt's results suggest that the vortex motion is the dominant factor that drives this phenomenon.
	www.fluent.com /about/news/newsletters/01v10i2/a8.htm (658 words)

	Pressure
		The qualitative behavior that is usually labeled with the term "Bernoulli effect" is the lowering of fluid pressure in regions where the flow velocity is increased.
		This is commonly interpreted as an application of the Bernoulli principle and involves the viscosity of the air and the boundary layer of air at the surface of the ball.
		The Bernoulli equation cannot really be used to predict the amount of curve of the ball; the flow of the air is compressible, and you can't track the density changes to quantify the change in effective pressure.
	hyperphysics.phy-astr.gsu.edu /hbase/pber.html (1131 words)

	Chapter 6: Aerodynamics
		The tendency of a fluid to follow a curved surface is called the Coanda effect.
		The Bernoulli principle says that this slower moving air will appear to the wing to have a higher pressure that faster moving air.
		The Bernoulli principle states that the pressure the ball sees on the side towards the moving air is less than on the side where the air is still.
	sci-toys.com /scitoys/scitoys/aero/aero.html (2682 words)

	Daniel Bernoulli (Site not responding. Last check: 2007-10-28)
		Daniel Bernoulli, an eighteenth-century Swiss scientist, discovered that as the velocity of a fluid increases, its pressure decreases.Bernoulli's principle can be seen most easily through the use of a venturi tube.
		For this reason, the principle is sometimes called Bernoulli's Law of Pressure Differential.
		Since Bernoulli’s principle applies to fluids and air being one of them, we can explain the relationship between air velocity and pressure on the surfaces of an airfoil.
	www.sciencerangers.com /bernoullieffect.htm (230 words)

	Kite / Hang-Glider Improvement
		The Bernoulli Effect is the source of some the lift created.
		The bulged curvature of the topmost surface is central to this.
		This effect means there is less benefit from the Bernoulli Effect, which means there is less lift created by the airfoil surface.
	mb-soft.com /public/kite.html (1244 words)

	Bernoulli Effect, Schema-Root news (Site not responding. Last check: 2007-10-28)
		We took advantage of the Bernoulli effect, where wind speeds increase in order to pass round an object, especially where the shape is streamlined.
		Schmidt found the Bernoulli effect operating near the showerhead, with air moving faster and pressure dropping on the inside of the shower curtain.
		We're all taught about Bernoulli effect and lift generation as the primary means by which an airfoil generates lift.
	schema-root.org /science/physics/effects/bernoulli (319 words)

	Angle of Attack for Airfoil
		While an airplane wing is one of the most popular examples of the Bernoulli effect, many discussions allege that the Bernoulli lift is actually a small part of the lift force which allows the aircraft to fly.
		It is part of the nature of viscosity and viscous flow that the part of the fluid at a surface such as the walls of a tube is essentially at rest.
		This boundary layer interaction coupled with the Bernoulli effect is responsible for curving baseballs, and can produce a drop ball if the ball is given topspin.
	hyperphysics.phy-astr.gsu.edu /hbase/fluids/angatt.html (584 words)

	Bernoulli
		Bernoulli's theorem is just a statement of the law of conservation of energy and so it is true for airplane wings.
		The Bernoulli equation gives the change in pressure due to changes in velocity along a streamline not due to relative velocity with respect to a surface.
		This is because the lowering of pressure due to Bernoulli's equation is not due to the relative velocity of the air and the surface of the ball!
	www.exo.net /~pauld/physics/bernoulli.html (1256 words)

	Bernoulli-effect web stabilizer - Patent 4913049
		The optical sensor generates a signal indicative of the register pattern, which is analyzed to determine the lateral and rotational registration of the respective print cylinders vis-a-vis the reference cylinder.
		Registration error signals, produced in accordance with the registration pattern, are employed to effect position correction of the respective print cylinders.
		Consequently, the Bernoulli effect is largely confined to that portion of stabilizer 130 downstream of gap 206.
	www.freepatentsonline.com /4913049.html (4259 words)

	Bernoulli Effect
		The Bernoulli effect provides that, when a gas such as air flows, its pressure drops.
		This is the basis for how aircraft wings work: The cross-sectional shape of the wing, called an aerofoil (or airfoil), forces air to follow a longer path over the top of the wing, thereby speeding it up and creating a net upward force called lift.
		Figure E.3 illustrates the Bernoulli effect for the case of a reservoir at constant pressure
	ccrma-www.stanford.edu /~jos/pasp05/Bernoulli_Effect.html (188 words)

	Bernoulli's Principle Animation
		Bernoulli's Principle states that as the speed of a moving fluid increases, the pressure within the fluid decreases.
		The Bernoulli's Principle animation on this page explores the behavior of an ideal fluid passing through a pipe.
		Each flow marker may be thought of as a small ball having the same density as the surrounding fluid, and traveling along with that fluid.
	home.earthlink.net /~mmc1919/venturi.html (540 words)

	"The Bernoulli Effect" Information (Site not responding. Last check: 2007-10-28)
		All answers for these types of questions should tell/show me where the High Pressure area is; where the Low Pressure area is; where the stream of air is moving; and where any other movement is taking place.
		Also note, the high-pitched noise and rotation of the index card are not the effects the question is looking for.
		Also note, the lovely racket and rotation of the ping-pong ball are not the effects the question is looking for.
	www.physics.emich.edu /phy110/Cam/bernoulli_info.htm (334 words)

	How Boomerangs Work. J & N Boomerangs, boomerang design, how to design boomerangs, boomerangs aerodinamics
		They are not magical sticks that obey their master's every command, but actually work on the same principle that makes the airplane fly, the sail boat move through the water, and the helicopter lift off.
		Bernoulli's principle describes what is now known as the "Bernoulli Effect." It states that "the pressure of a gas decreases as its velocity increases."
		And as Bernoulli has been so kind to tell us, this higher velocity means a low pressure area is formed on the top of the wing, thereby creating lift.
	www.jnboomerangs.com /HowBwork.htm (412 words)

	arteriosclerosis
		Bernoulli's equation relates pressure to fluid speed and elevation.
		According to the Bernoulli principle, as the velocity of a fluid increases, its pressure decreases.
		At this moment, there is no Bernoulli effect, and the vessel reopens under arterial pressure.
	www.unc.edu /~mmlee/webproject2.html (760 words)

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