Condensation-driven fluid motions

Block, J. A.

doi:10.1016/0301-9322(80)90042-7

Cited by 25 publications

(6 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6). At the same time, the remaining attached vapor was cut off from the nozzle exit due to the shock front generated by bubble implosions [29][30][31], and a new cycle began as another bubble grew from the nozzle. Fig.…”

Section: Bubble Motionsmentioning

confidence: 99%

“…At Stage 2 (1.8-2.452ms), the deviations after the detachment may be caused by the dramatic increase of capillary waves formed on the bubble surface. These waves intensify the roughness of bubble surface, which greatly enhances the shear stress between bubbles moving with translatory velocity and motionless cool bulk [28,29]. Thus, the viscosity near the interface is the dominant factor for the dissipation caused by shear stress.…”

Section: Verification Of Modelmentioning

confidence: 99%

“…Therefore, the damping coefficient should be much greater than the one calculated with normal hydraulic parameters. Moreover, the viscosity increases greatly with the time, which accelerates the oscillation process [28,29]. The above two factors will induce parametric discrepancies between experiments and predictions at Stage 2.…”

Section: Verification Of Modelmentioning

confidence: 99%

See 2 more Smart Citations

Pressure oscillation of submerged steam condensation in condensation oscillation regime

Yuan

Chong

Zhao

et al. 2016

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

The condensation oscillation of submerged steam was investigated theoretically and experimentally at the condensation oscillation regime. It was found that pressure oscillation frequency was consistent with the bubble oscillating frequency and there was a quasi-steady stage when bubble diameters remained constant. A thermal-hydraulic model for the condensation oscillation regime was proposed based on potential flow theory, taking into account the effects of interface condensation and translatory flow. Theoretical derivations indicated that oscillation frequencies were mainly determined by bubble diameters and translatory velocity. A force balance model was applied to the calculation of bubble diameters at quasi-steady stage, and the oscillation frequencies were predicted with the calculated diameters. Theoretical analysis and experimental results turned out that oscillation frequencies at the condensation oscillation regime decreased with the increasing steam mass flux and pool temperature. The predicted frequencies corresponded to the experimental data well with the discrepancies of ±21.7%.

show abstract

Section: Bubble Motionsmentioning

confidence: 99%

Section: Verification Of Modelmentioning

confidence: 99%

See 1 more Smart Citation

Pressure oscillation of submerged steam condensation in condensation oscillation regime

Yuan

Chong

Zhao

et al. 2016

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

show abstract

“…In certain cases there is a collapse of the original bubble after detachment. Detached parts of the bubble are dragged away from the steam injector and continue to condense, generating a trace of smaller steam bubbles in the downstream flow [19]. Figure 4 shows a possible cycle of a bubbling regime of DCC.…”

Section: Bubbling Regimementioning

confidence: 99%

“…This map is a graph describing the appearance of different regimes at specific conditions in terms of their geometric appearances and dynamic features. Various regime maps have been published in literature [6], [7], [9], [19]- [21] which show the occurrence of different regimes, depending on the steam inflow rate and the temperature of water subcooling. These two-dimensional maps were obtained during experiments performed at various environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Regimes of direct contact condensation of steam injected into water

Calay

Holdo̸

2007

The International Journal of Multiphysics

View full text Add to dashboard Cite

Direct contact condensation of steam injected into water is a special mode of condensation where condensation occurs on the interface between steam and water. Crucial in the modelling of direct contact condensation is the behaviour of the injected steam, commonly termed as a regime.Depending on the environmental conditions, steam injected into water appears in different regimes. These are observed in different geometrical appearances of the injected steam and are ranging from steam being condensed in the injector to bubbles and jets of steam formed in water.The two dimensional regime maps and models presently available are able to predict different condensation behaviour for limited range of flow conditions.In this paper a new three-dimensional condensation regime diagram is presented. The diagram is capable of predicting regimes for a wide range of flow conditions as well as different sizes of steam injector. Furthermore, expected penetration distance of steam injected into water, which is also crucial in modelling of the process, is presented for different flow conditions in the form of a new two-dimensional steam plume length diagram.

show abstract