{"id":8432,"date":"2018-11-19T09:46:51","date_gmt":"2018-11-19T09:46:51","guid":{"rendered":"https:\/\/www.experimentoscientificos.es\/?page_id=8432"},"modified":"2018-11-20T09:10:14","modified_gmt":"2018-11-20T09:10:14","slug":"efecto-venturi","status":"publish","type":"page","link":"https:\/\/www.experimentoscientificos.es\/en\/efecto-venturi\/","title":{"rendered":"Venturi effect"},"content":{"rendered":"

The venturi effect<\/strong>Venturi, demonstrated by the Italian physicist Giovanni Battista Venturi in 1797, is the effect whereby a fluid decreases in pressure as its velocity increases when passing through an area with a smaller cross-section.<\/p>\n

\"EFECTO<\/p>\n

The venturi effect is based on the Bernoulli principle<\/a> and the continuity of mass, the equations and the surrounding basis of a very simple calculation. From Bernoulli's principle we learn that the energy in each section of the closed circuit is constant. If the velocity increases, the pressure must decrease so that the sums of energies remain constant.<\/p>\n

VENTURI EQUATION<\/h2>\n

The Venturi equation is based on mass continuity (continuity of flow in each section of a closed circuit) and Bernoulli's principle.<\/p>\n

The law of conservation of mass says that in a stationary flow all the flow (mass per unit time) that enters one side of an enclosure must leave through another. This implies that if we decrease the circuit section, the velocity must increase.<\/p>\n

\"ecuacion<\/p>\n

Bernoulli's principle on the other hand establishes the principle of conservation of energy. The energy contained in a fluid in a closed circuit is the sum of kinetic, potential and pressure energy. This must remain constant at the inlet and outlet of the circuit.<\/p>\n

\"ecuacion<\/p>\n

We remove the potential energy from the equation because it remains constant:<\/p>\n

\"ecuacion<\/p>\n

This means that if the speed is modified, (without modifying the height), the fluid pressure must vary<\/strong>.<\/p>\n

Knowing the pressure variation we can get the velocity variation experienced by the fluid and hence the usefulness of the venturi tube for measuring flow velocities.<\/p>\n

\"ecuacion<\/p>\n

\"ecuacion<\/p>\n

\"ecuacion<\/p>\n

VENTURI EFFECT AND FLUID MECHANICS EXPERIMENTS<\/h2>\n
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How Planes Fly Experiment. Bernoulli's Principle<\/a><\/h3><\/div>\n\n<\/strong> In this experiment, carried out at the Alcobendas Science Museum, we are going to see how the lift of an aeroplane wing is produced following Bernoulli's principle.<\/div>\n\n<\/div>\n
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Venturi Effect Demonstration Experiment<\/a><\/h3><\/div>\n\n<\/strong> This experiment was recorded at the Alcobendas Science Museum. In it you can experience the overpressure produced by the Venturi effect by widening the air duct section.<\/div>\n\n<\/div>\n
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<\/div>\n\n\n <\/div>\n

VENTURI TUBE<\/h2>\n

The venturi tube is a tube designed to measure the velocity of a fluid. By knowing the initial velocity and measuring the pressure difference, the fluid velocity at the problem point can be known.<\/p>\n

\"tubo<\/p>\n

The basic venturi tube consists of a tube formed with 2 joined sections joined by a narrow tube in which the fluid travels at a higher velocity. The pressure is measured through a vertical tube attached to both the wide and narrow sections. The difference in height of the tubes allows the pressure at each point to be known.<\/p>\n

The venturi tube is also used to accelerate the velocity of a fluid by passing it through a narrower tube. It is essential in systems where fluid velocity is very important.<\/p>\n

APPLICATIONS OF THE VENTURI EFFECT<\/h2>\n

The applications of the venturi effect are mainly due to the pressure drop that occurs when a fluid is passed through a narrower cross-section. If this section is sufficiently reduced so that the pressure becomes negative, this will cause a suction. <\/strong>The suction produced through the Venturi effect is constantly used in applications where a mixture of fluids (either liquid or gas) is required such as:<\/p>\n

    \n
  • Car carburettor<\/strong>The carburettor sucks in the fuel by the Venturi effect. It mixes with the air (fluid from the main duct) as it passes through a narrowing.<\/li>\n
  • Hydraulics - Fire brigade<\/strong>The depression generated in a constriction by increasing the fluid velocity is used in Z-type mixers to add foam concentrate to a water line for extinguishing.<\/li>\n
  • In small water pumps where you want to inject a gas (e.g. CO2 in aquariums) or suction (ozone in domestic appliances).<\/li>\n
  • Oil<\/strong>Suction, which originates from the change of section, is used to extract fluids from oil wells.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

    The venturi effect, demonstrated by the Italian physicist Giovanni Battista Venturi in 1797, is the effect whereby a fluid decreases in pressure as its velocity increases when passing through an area with a smaller cross-section. The venturi effect is based on Bernoulli's principle and the continuity of mass, with the equations and the basis surrounding it being of a [...]<\/p>","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"acf":[],"yoast_head":"\nEfecto Venturi<\/title>\n<meta name=\"description\" content=\"El efecto Venturi es el efecto por el que se origina una bajada de presi\u00f3n en flu\u00eddo al modificar la secci\u00f3n de corriente. 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