# 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 ?
To design a controller to avoid deadlock, it is necessary to find the strict minimal siphons as: [S.sub.1] = {[p.sub.1], [p.sub.3], [p.sub.4]}, and [S.sub.2] = {[p.sub.1], [p.sub.2], [p.sub.4]}.
For a well-marked OSC-[S.sup.*] PR net, Algorithm 1 having no feasible solution means that all siphons of this net are max'-controlled.
Water is drawn through the siphon into the mantle cavity and over the osphradium, a highly developed chemosensory organ (Hughes 1986).
One was a roadway crossing with three 84-inch diameter siphons running parallel for 180 feet.
For the augmented marked graph (N, [M.sub.0]; R) shown in Figure 3, the minimal siphons are : {[p.sub.1], [p.sub.5], [p.sub.8]}, {[r.sub.1], [p.sub.2], [p.sub.4], [p.sub.6], [p.sub.7], [].sub.9]}, {[r.sub.1], [p.sub.2], [p.sub.4], [p.sub.6], [p.sub.7], [p.sub.10]}, {[r.sub.2], [p.sub.3], [p.sub.5], [p.sub.6], [p.sub.8], [p.sub.9]} and {[r.sub.2], [p.sub.3], [p.sub.5], [p.sub.6], [p.sub.8], [p.sub.10]}.
The book also includes a chapter with recipes that use the iSi Soda Siphon, including ones for Ice Cream Soda and Sangria.
For each genotype, one ramet was left unfertilized (to assess the level of sperm contamination or self-fertilization), one ramet was fertilized about 22 ([+ or -]2) h after the beginning of siphon opening (when results from the previous experiment indicated that all siphons should be open), and remaining ramets (2-3) were fertilized at various times up to 85 h after initial siphon opening.
The condition of the two cast iron siphon pipes supported by soft sediments was unknown, since they had not been cleaned or inspected since their 1936 construction.
Some will deposit on the side walls of the vessel, on the bottom of the vessel, in the fill siphon, in the pour siphon and in the throat of the inductor [ILLUSTRATION FOR FIGURE 1 OMITTED].
Revamping of the underwater crossing, that started in November 2018, envisages replacement of more than 2 km of pipes with the diameter of 530 mm, including two siphons of the main and the standby leg, each 882 m long.
Particulary, most of them employed the concept of siphons in their deadlock prevention methods [2-9].

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