Dynamic Analysis of Bubble-Driven Liquid Flows in a Rectangular Tank

Kim, Sang-Moon; Yi, Seung-Jae; Hyundong, Kim; Kim, Jong-Wook; Kim, Kyung Chun

doi:10.5407/jksv.2010.8.1.031

Cited by 1 publication

(1 citation statement)

References 13 publications

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“…It was observed that the large-scale recirculation resulting from the interaction between rising bubble stream and side wall is the most dominant flow structure, and there are smallscale vortical structures moving along with the large-scale recirculation flow. Kim et al (2010b) performed an experimental study to evaluate dynamic structures of flow and turbulence characteristics in bubble-driven liquid flows in a rectangular tank by using PIV and proper orthogonal decomposition (POD) method. With increasing Reynolds number (Re), bubble-induced turbulent motion becomes dominant rather than the recirculating flow near the side wall.…”

Section: Introductionmentioning

confidence: 99%

Dynamic structures of bubble-driven liquid flows in a cylindrical tank

Kim

et al. 2011

Exp Fluids

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The spatial and temporal structures of turbulent water flows driven by air bubbles in a cylindrical tank were investigated. The time-resolved particle image velocimetry technique was adopted for quantitative visualization. Flow rates of compressed air were changed from 1 to 5 L/min at 0.5 MPa, and the corresponding range of bubble-based Reynolds number (Re) ranged from 8,300 to 21,100. The dynamics of flow structures was further investigated by the time-resolved proper orthogonal decomposition analysis technique. With increasing Re, mean velocity fields driven by the rising bubbles are almost same, but turbulence is dramatically enhanced. Both spatial and temporal modes were quite different with respect to the air flow rates. Three most dominant spatial structures are recirculating flow, bubble-induced motion, and sloshing of free surface, the bigger the latter the higher Re. We found the frequency of sloshing motion from flow visualization and the FFT analysis of temporal modes.

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Section: Introductionmentioning

confidence: 99%

Dynamic structures of bubble-driven liquid flows in a cylindrical tank

Kim

et al. 2011

Exp Fluids

View full text Add to dashboard Cite

show abstract

Dynamic Analysis of Bubble-Driven Liquid Flows in a Rectangular Tank

Cited by 1 publication

References 13 publications

Dynamic structures of bubble-driven liquid flows in a cylindrical tank

Dynamic structures of bubble-driven liquid flows in a cylindrical tank

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