Theoretical analysis of bubble dynamics for an artificially produced vapor bubble in a turbulent stream

Robin, T. T.; Snyder, N.

doi:10.1016/0017-9310(70)90148-1

Cited by 10 publications

(1 citation statement)

References 2 publications

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“…Robin et al 5 established a mathematical model of artificially produced vapor bubble growing on a surface and into a turbulent subcooled stream flowing parallel to the surface; they found that condensation at the bubble vapor–turbulent stream interface and subsequent diffusion of the associated latent heat were the major components of the model. Farzpourmachiani et al 6 discussed the effect of aspect ratio of the column on the flow pattern, liquid velocity, and gas hold‐up profiles through a three‐dimensional Eulerian–Lagrangian model.…”

Section: Introductionmentioning

confidence: 99%

Visualization research on bubble in overflow sieve plate hot water tower

Bao

Wang

et al. 2020

Asia-Pacific J Chem Eng

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In this paper, an experimental apparatus was developed based on the evaporating water tower of the circuit bottom-ash sluicing system. The formation and movement of single bubble that emerged from an orifice with 5 mm diameter in the middle of the tray were investigated by visual experiments, with water flow rates of 150, 200, and 250 L/h −1 , steam flow rate of 5 kg/h −1 , and nitrogen flow rates of 0.1632 and 0.32645 kg/h −1. The lifetime of bubbles was recorded by high-speed camera, and the characteristics of bubble deformation and movement were determined by image processing software Image Pro-plus. Results showed that the lifetime of bubbles was divided based on the pictures into three parts, namely, formation, region, and oscillation regions. Bubble deformation and movement were assessed in each part. The equivalent radius of bubbles increased rapidly in the first region because of gas influx and grew more slowly in the two latter regions. The aspect ratio of bubbles changed from large to small in the formation region but surged in the oscillation region. The vertical velocity of the centroid of steam bubbles increased at the beginning and then fluctuated. However, the vertical velocity of the centroid of nitrogen bubbles increased over time due to the lack of mass transfer. The hollow phenomenon was found in steam and mixture bubbles through condensation. The effect of noncondensable gases on transmission was also discussed. With increasing nitrogen ratio, the time of formation and oscillation regions decreased for the mixed gas bubbles, leading to the deterioration of heat transfer in the tower. This work provides theoretical guidance for evaporating hot water tower operation.

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Section: Introductionmentioning

confidence: 99%