Pengaruh Volume Alir Udara terhadap Pola Sebaran Gelembung pada Bubble Plume
Abstract: Bubble plume is the
effective way to generate bubbles by air injection from the bottom of bath.
Bubble plumes is important for gas transfer process, turbulence generation,
collecting the surface-floating substance, and also important to mixing effect
in chemical process. This research aims to analyse effect of gas flowrate on
bubble dispersion pattern in bubble plume. An experimental apparatus to
investigating bubble dispersion consists of a transparent vertical bath is 500
mm length, 24 mm wide and 750 mm height. The bubble generator consists of 110
needles, each needle is 0.25 mm in diameter, installed at the bottom of bath. The
experimental method was used in this research. Data were taken by high
resolution digital camera. Bubble dispersion pattern was generated by air
injection from the bottom of bath. The experiments was done at various gas
flowrate that is 4.16 x 10-6m3/s, 6.67 x 10-6m3/s, 10.4 x 10-6m3/s, 18.83 x 10-6m3/s dan 31.6 x
10-6m3/det. Data analyse using ImageJ software to get number, dimension and
position of bubble. The experimental results show that increase of gas flowrate
causes the number and the diameter of bubble increase and also to widen of
diameter interval and bubble dispersion. In each of gas flowrate the bubble
trend coalescence intermittently. The intermittent coalescence decrease with
the increase of gas flowrate.
Penulis: Prihanto Trihutomo
Kode Jurnal: jptmesindd150521