| Preface |
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The
word "bubble" is a general term that can refer to various phenomena that occurs at the surface of a liquid when gas comes out of a liquid.
However, when the term "Bubble" is used for technical purposes, it is necessary to maintain the distinction in definition between the terms "foam"and"bubble".
In this homepage, the term
"bubble"
will means small bodies of gas entrained and dispersed in the fluid.
"Foam" refer to bubbles that float onthe fluid surface, differing from "Bubbles" that will refer to small bodies of gas located throughout a given fluid.
A thin film surrounds the small bodies of gas that make up foam. Form is created when a fluid is rapidily mixed with air and can create many operating and product problems.
It also occurs when bubbles in the fluid rise to the surface or when fluid is injected into the reservoir thorugh a pipe.
The following is a list of factors involved in the formation of bubbles and the areas in equipment where bubbles are likely to form.
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1.Suction resistance 2.Throttle, orifice 3.Branch, pipe joint 4.Valves that are opening and closing frequently 5.Shock waves due to suddenly closing frequently 6.Pressure drop at pipe end due to the sudden opening of a valve 7.External force on piston rod or on gears or bearings |
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