siphon


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siphon

(sī`fən, –fŏn), tube or other enclosed conduit through which a liquid is lifted over an elevation and then emptied at a lower level. The movement of the liquid is driven primarily by the force of gravity. A siphon is typically shaped like an inverted J or U; to operate, it must discharge at a level lower than that of the liquid's surface on the intake side. The siphon must be filled before it will operate; suction is sometimes used initially to draw a liquid into a empty siphon.

Siphon

 

a bent tube with legs of different lengths, through which a liquid flows from a vessel at a higher leveito a vessel at a lower level (see Figure 1). In order to start the operation, the siphon must first be filled with the liquid. The action of a siphon results from the fact that the pressure on the liquid volume filling the upper (hatched) section of the siphon applied from the direction of the upper reservoir, that is, from the left, is higher than that applied from the direction of the lower reservoir, that is, from the right. Thus, at the moment when the flow starts, the pressure on the left is equal to p0γh1 and the pressure on the right is equal to p0 - γh2, where γ is the specific weight of the liquid, p0 is the pressure on the free surface of the liquid, and h2 > h1. In this manner, when the liquid is flowing

Figure 1. Diagram of the operation of a siphon

through the siphon, a pressure is established in the upper section that is lower than p0. The greater the difference in the heights h2 - h1 and the greater the liquid’s energy loss in overcoming the resistance of the tube, the greater the pressure drop in the upper section. This circumstance limits the difference in the heights of the liquid and, consequently, the operation of the siphon; when the pressure in the flow is below a certain limit, the column of liquid is disrupted. When cold water at atmospheric pressure is being transferred by a siphon, the maximum difference in the heights is usually no more than 6 to 7 m.

siphon

[′sī·fən]
(botany)
A tubular element in various algae.
(engineering)
A tube, pipe, or hose through which a liquid can be moved from a higher to a lower level by atmospheric pressure forcing it up the shorter leg while the weight of the liquid in the longer leg causes continuous downward flow.
(geology)
A passage in a cave system that connects with a water trap.
(invertebrate zoology)
A tubular structure for intake or output of water in bivalves and other mollusks.
The sucking-type of proboscis in many arthropods.

siphon

, syphon
1. a tube placed with one end at a certain level in a vessel of liquid and the other end outside the vessel below this level, so that atmospheric pressure forces the liquid through the tube and out of the vessel
2. See soda siphon
3. Zoology any of various tubular organs in different aquatic animals, such as molluscs and elasmobranch fishes, through which a fluid, esp water, passes
References in periodicals archive ?
Coffee connoisseurs will have a reason to skip the trip to the coffee house this holiday season thanks to the new KitchenAid Siphon Coffee Brewer, designed to deliver the bright, rich taste of siphon coffee with the convenience of an automated home system.
The investment from Finance Wales will accelerate the next phase of its growth plan as Siphon looks to increase its presence in the UK and Benelux, as well as expanding into other European markets.
Since then, although he has heard reports of water pumps being used to siphon off water, he is yet to catch anyone in the act, or hear of anyone being punished for doing so.
BEIRUT: Caretaker Energy and Water Minister Gebran Bassil warned Friday that the recent Israeli discovery of a new gas field 4 kilometers away from the Lebanese coast meant Israel could easily siphon off Lebanon's gas wealth.
The defective siphon can stop sending gasoline to the engine at high temperatures, altitudes or fuel vapor pressure, according to the statement.
I had all these parts lying around, so I combined the boiler from an old espresso machine with a siphon brewing chamber, and found that it made fantastic tasting coffee in far less time.
This was a professional operation, they have probably used an electric pump to siphon off the fuel into a large tank.
There was visible sagging at siphon ends, and the Authority was uneasy about structural integrity.
Zeta will make the new full siphon, which can be used on a much wider range of toilets, including new ones.
UN pea c ekeeping mi s s ion spokesman Madnodje Mounoubai said that people came out and tried to siphon the contents of the tanker.
A siphon is a tube commonly used to empty containers of liquid that are otherwise difficult or impossible to empty, such as fish tanks or petrol tanks.