Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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An Experimental Study on the Flow Characteristics in Highly Viscous Liquid by Multi-Nozzle Bubbling

고점성 액체 내부에서의 다중 노즐 버블링에 의한 유동특성에 대한 실험적 연구

  • Published : 2007.02.01
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Abstract

A visualization study of flow characteristics in a mixer using multi-nozzle bubbling was performed. The mixer is filed with liquid glycerin (dynamic viscosity = $1000mPa{\cdot}s\;at\;25^{\circ}C$) and convective mixing is induced by air bubbles generated from 9 orifices installed on the bottom of the mixer. To visualize the flow field, PIV (Particle Image Velocimetry) system consisting of 532nm Nd:YAG laser, $2k{\times}2k$ CCD camera and synchronizer is adopted. The bubbles generated with uniform size and frequency form bubble stream and bubble streams rise vertically without interaction between bubble streams. Mixing efficiency is affected by the height of bubbler and the effective height of bubbler is 20nm from the bottom of the mixer.

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References

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  1. Characteristics of Bubble-driven Flow by Using Time-resolved PIV and POD Technique vol.6, pp.1, 2008, https://doi.org/10.5407/JKSV.2008.6.1.041