# siphon

(redirected from siphons)
Also found in: Dictionary, Thesaurus, Medical, Idioms.

## 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 ?
Water is drawn through the siphon into the mantle cavity and over the osphradium, a highly developed chemosensory organ (Hughes 1986).
The siphons are made from reinforced concrete pipe that is typically used in storm sewers and other low pressure applications.
Zeta will make the new full siphon, which can be used on a much wider range of toilets, including new ones.
First, we propose a number of characterisations for live and reversible augmented marked graphs, based on siphons and cycles.
I would like to buy a pineapple ice bucket and a soda siphon like the ones she has.
distributes the core product line, which includes hand-held whipped cream makers, dessert makers, soda siphons, the new Gourmet Whip, and each product's respective [N.
The sexual cycle includes the internal fertilization of the mature eggs soon after the inhalant siphons open (Milkman, 1967); the continuous release of sperm starting 16 h later (Stewart-Savage and Yund, 1997); and the brooding of developing embryos, which are released just before the zooids degenerate at the end of the cycle (Milkman, 1967).
The department of transportation's plans showed the new bridge piers to be much closer to the siphon pipes than those of the existing bridge.
The diameter of the siphons must be large enough to accommodate any buildup that occurs between cleanings so that the metal flow will not be affected.
Builders' foresight allows half of the siphon to carry water while
ABSTRACT The objectives of this study were to determine chemical composition of the siphon and the mantle of commercial-size geoducks clams harvested in Southeast Alaska, and to measure textural differences between the two muscle tissues, comparing them with their frozen counterparts.
Liss Professional products, whether it is our cream whippers, soda siphons, or chargers, are made of the highest-quality materials, are engineered to the highest manufacturing standards, and are designed to be functional, safe, and beautiful.

Site: Follow: Share:
Open / Close