Bubble rise characteristics in oscillating grid turbulence

Yao，Ning1; Wang，Yunping1; Liu，Jingting1; Sun，Xun1; Hao，Zongrui2; Liu，Yan1; Chen，Songying1; Wang，Guichao1,3

2021-04-01

10.1016/j.mineng.2021.106832

MINERALS ENGINEERING   影响因子和分区

0892-6875

To clarify the effects of free stream turbulence and surfactant concentration, a systematic study was carried out using an advanced PIV/Shadowgraphy system. The experiments were carried out for the case of single bubbles as well as bubbles rising in chains in grid generated turbulence. The data on rise characteristics of the bubbles along with liquid flow pattern are reported for the first time for the bubbles rising in surfactant solution in presence of controlled turbulence. An oscillating grid apparatus was used to generate nearly isotropic flow with nearly zero mean flow. The in-house image processing routines were used to deduce the trajectory of the bubbles along with the parameters describing bubble shape characteristics like the eccentricity and interface wobbling. The results indicated that the modification of rising velocity was a function of the turbulent characteristics, the bubble frequency and the surfactant concentration. The maximum interactions between the continuous and dispersed phases occurred at higher bubble frequency and higher surfactant concentration. The increase in turbulence intensity was observed to increase the bubble rise velocity at higher surfactant concentration.

Bubble rise PIV Shadowgraphy Surfactant Turbulence

SCI ; EI

英语

其他

Natural Science Foundation of China[22008141]

Engineering ; Mineralogy ; Mining & Mineral Processing

Engineering, Chemical ; Mineralogy ; Mining & Mineral Processing

WOS:000634857300004

PERGAMON-ELSEVIER SCIENCE LTD

20210809972445

Bubbles (in fluids) ; Flow patterns ; Image processing ; Surface active agents ; Turbulence

Fluid Flow, General:631.1 ; Gas Dynamics:631.1.2 ; Chemical Agents and Basic Industrial Chemicals:803

GEOSCIENCES

2-s2.0-85101148111

Scopus

1.National Demonstration Center for Experimental Mechanical Engineering Education,Key Laboratory of High-efficiency and Clean Mechanical Manufacture,School of Mechanical Engineering,Shandong University,Jinan,250061,China
2.Institute of Oceanographic Instrumentation,Qilu University of Technology (Shandong Academy of Sciences),Qingdao,266100,China
3.SUSTech Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen,518055,China

Yao，Ning,Wang，Yunping,Liu，Jingting,et al. Bubble rise characteristics in oscillating grid turbulence[J]. MINERALS ENGINEERING,2021,164.

Yao，Ning.,Wang，Yunping.,Liu，Jingting.,Sun，Xun.,Hao，Zongrui.,...&Wang，Guichao.(2021).Bubble rise characteristics in oscillating grid turbulence.MINERALS ENGINEERING,164.

Yao，Ning,et al."Bubble rise characteristics in oscillating grid turbulence".MINERALS ENGINEERING 164(2021).