1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Integral momentum balance on a growing bubble
Rent:
Rent this article for
USD
10.1063/1.4844416
/content/aip/journal/pof2/25/12/10.1063/1.4844416
http://aip.metastore.ingenta.com/content/aip/journal/pof2/25/12/10.1063/1.4844416
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Experimental facility. (a) Experimental vessel. (b) Test sample (length given in mm).

Image of FIG. 2.
FIG. 2.

Nucleation site geometry. Colour shading refers to the depth. (a) 3D representation. (b) cross-section.

Image of FIG. 3.
FIG. 3.

Illustration of the successive steps of image processing. (a) Determination of the bubble contour. (b) Bubble local curvature.

Image of FIG. 4.
FIG. 4.

Schematic of the control volume for the momentum balance. (a) Image with bubble contour. (b) Schematic of the control volume. (c) Volumes, surfaces, and lines involved. (d) Thermodynamic variables involved.

Image of FIG. 5.
FIG. 5.

Evolution of the contact angle θ and of the angle α for a small change in the triple line location close to the nucleation site edge.

Image of FIG. 6.
FIG. 6.

Smoothed interface of a bubble at a wall superheat of 2.1 K and at * = 0.5.

Image of FIG. 7.
FIG. 7.

Computation of the resultant of the triple line surface tension and adhesion forces for a growing bubble at a wall superheat of 2.1 K. (a) Evolution of angle α. (b) Resultant of the adhesion forces acting on a bubble, using the measured angle α and an underestimation of the angle by 10°.

Image of FIG. 8.
FIG. 8.

Computation of the momentum variation of a growing bubble at a wall superheat of 2.1 K. (a) Height of the center of gravity. (b) First time derivative of the height of the center of gravity. (c) Second time derivative of the height of the center of gravity. (d) Volume of a bubble. (e) Volumetric growth rate. (f) Momentum variation.

Image of FIG. 9.
FIG. 9.

Resultant of the liquid inertia forces acting on a growing bubble at a wall superheat of 2.1 K, using two different sets of added mass coefficients.

Image of FIG. 10.
FIG. 10.

Two first buoyancy terms of a growing bubble at a wall superheat of 2.1 K.

Image of FIG. 11.
FIG. 11.

Computation of the third buoyancy term of a growing bubble at a wall superheat of 2.1 K. (a) Curvature at the apex. (b) Resultant of the third buoyancy term acting.

Image of FIG. 12.
FIG. 12.

Momentum balance for two growing bubbles, at a wall superheat of Δ ≈ 2.1 K (a) and of Δ ≈ 4.7 K (b). (a) Wall superheat of . (b) Wall superheat of .

Image of FIG. 13.
FIG. 13.

Comparison between the bubble contour obtained by image processing from experimental data (squares, blue) and obtained by simulation (triangles, red) for a 0.487  pentane bubble on a 90 μm radius orifice.

Image of FIG. 14.
FIG. 14.

Simulation of the apparent contact angle evolution with the bubble volume, with the physical and geometrical conditions of the experiment.

Image of FIG. 15.
FIG. 15.

Momentum balance for two growing bubbles, at a wall superheat of Δ ≈ 2.1 K (a) and of Δ ≈ 4.7 K (b), using simulated values of the contact angle for the determination of the triple line adhesion force. (a) Wall superheat of . (b) Wall superheat of .

Image of FIG. 16.
FIG. 16.

Comparison of the bubble momentum due to the acceleration of the center of gravity and due to the jet effect.

Loading

Article metrics loading...

/content/aip/journal/pof2/25/12/10.1063/1.4844416
2013-12-17
2014-04-16
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Integral momentum balance on a growing bubble
http://aip.metastore.ingenta.com/content/aip/journal/pof2/25/12/10.1063/1.4844416
10.1063/1.4844416
SEARCH_EXPAND_ITEM