Investigation of Taylor bubble wake structure in liquid nitrogen by PIV technique

Liu, Yi‐Peng; Wang, Pingyang; Wang, Jing; Du, Zhimin

doi:10.1016/j.cryogenics.2013.01.003

Cited by 8 publications

(2 citation statements)

References 34 publications

(56 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For N f > 1500, the vortices in the wake were shed randomly, exhibiting turbulent characteristics that decayed as they moved downstream. Liu et al [13] compared these boundaries to wake velocity profiles for vapor bubbles rising in stagnant liquid nitrogen. Results from their particle image velocimetry (PIV) technique revealed that due to the significant property differences between water (used by Campos and Carvalho) and liquid nitrogen, the prediction of wake regimes was not applicable to cryogenics as transitional and laminar wake patterns were observed for N f ) 1500.…”

Section: Taylor Bubble Hydrodynamicsmentioning

confidence: 99%

“…The film thickness under these conditions were therefore calculated from analysis of the high-speed video captured in the adiabatic section. Error in the measurement created by optical distortion was removed by a calibration procedure similar to Liu et al [13] in which a grid of known spacing was placed in the test section tube. The apparent spacing was compared to the known spacing to create a calibration curve.…”

Section: Laboratory Reference Frame Bubble Reference Framementioning

confidence: 99%

See 1 more Smart Citation

A study of gravitational effects on single elongated vapor bubbles

Scammell

Kim

Magnini

et al. 2016

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

a b s t r a c tAn experimental study was completed on the heat transfer induced by a single elongated vapor bubble rising in vertical, upward, co-current flow at various accelerations. The bubble shape and behavior were also studied under those conditions. Tests were conducted using a flow boiling rig which coupled flow visualization with measurements of the heat transfer and liquid film thickness. The bubble drift velocity was shown to dictate the bubble shape as well as the relative influences of thin film evaporation and turbulent wake heat transfer. When present, vortices shed behind the bubble tail created peaks in the heat transfer coefficient whose magnitude decreased with increasing liquid Reynolds number and acceleration. The vortex frequency was found to be linearly dependent on plunging velocity. A criteria for vortex incipience was proposed.

show abstract

Section: Taylor Bubble Hydrodynamicsmentioning

confidence: 99%

Section: Laboratory Reference Frame Bubble Reference Framementioning

confidence: 99%