Determination of bubble size distribution in gas–liquid two‐phase systems via an ultrasound‐based method

Abstract

Over the past few years, ultrasonic techniques are increasingly used to determine bubble size distribution in gas-liquid two-phase systems. However, the development of a precise and efficient measuring system is very challenging because bubbles are dynamic and unstable relative to time and space in a moving fluid, thus hindering an accurate validation of the measuring system. Therefore, this study examined the possibility of using artificial bubbles to establish an ultrasonic measuring system. The main concept for this study involved developing an ultrasound-based measuring system with the aid of a certain type of artificial bubbles. The developed system was subsequently adapted to the bypass pipeline of a propagator to demonstrate the reliability of this concept. The results indicated that the established system could measure a microbubble size distribution with a root mean squared error of validation that corresponded to 0.1243 % v/v. Additionally, the estimates of real bubble measurement agreed well with the reference method. Thus, this study demonstrated that the developed system could be a potential method to determine bubble size distributions in gas-liquid two-phase systems.

Bubble size distribution and stability of CO2 microbubbles for enhanced oil recovery: effect of polymer, surfactant and salt concentrations

“…In contrast, the bubble size distribution technique evaluates increases in bubble size over time as a measure of stability. Several methods have been developed to ascertain bubble size distribution, including visual, electro-resistivity and acoustic techniques [36].…”

Oxygen Mass Transfer in Biopharmaceutical Processes: Numerical and Experimental Approaches

“…The ultrasonic method offers the great advantage that the bioreactor does not have to be transparent. It has been shown that comparable results can be achieved with ultrasonic and optical methods [121]. Shadowgraphy measurements belong to the optical measurement methods.…”

“…Essential extrusive methods include laser doppler anemometry (LDA) [117][118][119], ultrasonic [120][121][122][123][124] and shadow imaging (shadowgraphy) [125][126][127][128]. For LDA measurement, two laser beams cross each other in the transparent bioreactor.…”

Applying Imaging Technique to Investigate Effects of Solute Concentrations and Gas Injection Rates on Gas Bubble Generation

“…Rodrigues and Rubio [9] classified them into intrusive and nonintrusive methods. The intrusive methods include electroresistivity [43][44][45][46], ultrasound reflection [47][48][49][50][51], and optical techniques [52][53][54][55][56][57][58], which inevitably cause instrumented interference on bubble samples. In comparison to those approaches, the imaging technique as a nonintrusive method has been primarily adopted for both academic and industry bubble size measurement due to lower cost and ease of operation [5,9,15,16,28,30,59].…”