Various Factors on Bubble Size

Influence of Various Factors on Bubble Size A. Experimental Set-up 

The set-up can be divided into three sections as shown in Fig. 3 the gas supply, the bubble forming section, and the gas metering section. 

The supply of gas under constant pressure can be obtained either by the constant-level tank arrangement or by a compressor or cylinder through a surge tank. If mass transfer is to be avoided during bubble formation, then the gas can be passed through a bubbler containing the same liquid as that in which the bubble formation is to be studied. 

The bubble-forming section consists of a control valve (needle valve type), a chamber, and the liquid column. It is customary to have flat glass plates as two sides of the column, to assist photography and visual observation of the phenomenon. A manometer is also provided to evaluate the pressure difference across the nozzle. 

The bubbles formed break at the surface, where an inverted funnel having an outlet at the top collects them and conveys the gas to the measuring devices which have already been discussed in Section II. 

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