Fluid Mechanics and Machinery

Working Principle of Siphon

Working Principle of Siphon:

Today we will study about the working principle of Siphon. Before going into details I must say, here You will get the articles of Mechanical Engineering in Brief with Some Key Points and you will get to know an enormous amount of knowledge from It. So You Find helpful this articles please let us know in the comment box either if any correction required too, also let’s know in the comment box.

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What is Siphon:

Syphon is a long bent pipe which is used to transfer liquid from a reservoir at a higher elevation to another reservoir at a lower level, when the two reservoir are separated by a hill or high level ground as shown in the figure below.

Working Principle of Siphon
Working Principle of Siphon

Working Principle of Siphon:

The point C which is at the highest of the syphon is called summit. As the point c is above the free surface of water in the tank A, the pressure at C will be less than atmospheric pressure. theoretically, the pressure at c may be reduced to -10.3m of water, but in actual practice this pressure is only -7.6m of water or 2.7m of water absolute. If the pressure at c becomes less than 2.7m of water absolute, the dissolved air and other gases would come out from water and collect at the summit.The Flow of water will be obstructed.

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Siphon is used in the following cases:

  1. To carry water from one reservoir to another reservoir separated by a hill or ridge.
  2. To take out the liquid from the tank which is not having any outlet.
  3. To empty a channel not provided with any outlet sluice.

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