The rise and distortion of a two‐dimensional gas bubble in an inviscid liquid

1989 ◽  
Vol 1 (9) ◽  
pp. 1451-1459 ◽  
Author(s):  
G. R. Baker ◽  
D. W. Moore
Keyword(s):  
Gas Bubble ◽  
Two Dimensional ◽  
Inviscid Liquid

The pressure field around a two-dimensional gas bubble in a fluidized bed

1973 ◽  
Vol 28 (12) ◽  
pp. 2231-2243 ◽  
Author(s):  
Howard Littman ◽  
George A.J. Homolka
Keyword(s):  
Fluidized Bed ◽  
Pressure Field ◽  
Gas Bubble ◽  
Two Dimensional

scholarly journals Loading on a Rigid Target from Close Proximity Underwater Explosions

2012 ◽  
Vol 19 (4) ◽  
pp. 555-571 ◽  
Author(s):  
Mark Riley ◽  
Malcolm Smith ◽  
J.E. van Aanhold ◽  
Niklas Alin
Keyword(s):  
Three Dimensional ◽  
Computational Effort ◽  
Bubble Collapse ◽  
Time Of Arrival ◽  
Gas Bubble ◽  
Two Dimensional ◽  
Underwater Explosions ◽  
Close Proximity ◽  
Time Histories ◽  
Three Dimensional Simulations

The study describes recent simulation results for underwater explosions in close-proximity to rigid targets. Simulations are performed using Chinook, an Eulerian computational fluid dynamics (CFD) code. Predicted target loadings are compared with measurements taken from a series of experiments conducted under an international collaboration between Canada, The Netherlands, and Sweden. The simulations of the rigid target tests focused on the modelling of gas bubble collapse and water jetting behaviour. Both two-dimensional and three-dimensional simulations were performed. It was found that the two-dimensional analyses produced good bubble periods and reasonable impulse loading compared to experimental data. The time of arrival of the bubble collapse and water jetting were found to be very mesh dependent and refining the mesh did not always produce better results. The two-dimensional approach provides a good initial understanding of the problem for a reasonable computational effort. The three-dimensional simulations were found to produce improved impulse predictions. The numerical gas bubble radii time histories are also compared to empirical time histories.

The initial motion of a gas bubble formed in an inviscid liquid

1963 ◽  
Vol 17 (03) ◽  
pp. 321 ◽  
Author(s):  
J. K. Walters ◽  
J. F. Davidson
Keyword(s):  
Gas Bubble ◽  
Inviscid Liquid ◽  
Initial Motion

Bioinspired Two-Dimensional Structure with Asymmetric Wettability Barriers for Unidirectional and Long-Distance Gas Bubble Delivery Underwater

Nano Letters ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 2117-2123
Author(s):  
Xiao Xiao ◽  
Shukun Li ◽  
Xiandong Zhu ◽  
Xiao Xiao ◽  
Chunhui Zhang ◽  
...  
Keyword(s):  
Dimensional Structure ◽  
Gas Bubble ◽  
Two Dimensional ◽  
Long Distance

scholarly journals Potential flow of a second-order fluid over a tri-axial ellipsoid

2005 ◽  
Vol 2005 (4) ◽  
pp. 341-364 ◽  
Author(s):  
F. Viana ◽  
T. Funada ◽  
D. D. Joseph ◽  
N. Tashiro ◽  
Y. Sonoda
Keyword(s):  
Potential Flow ◽  
Flow Fields ◽  
Second Order ◽  
Stress Fields ◽  
Harmonic Potential ◽  
Gas Bubble ◽  
Two Dimensional ◽  
Trailing Edge ◽  
Principal Axes

The problem of potential flow of a second-order fluid around an ellipsoid is solved, and the flow and stress fields are computed. The flow fields are determined by the harmonic potential but the stress fields depend on viscosity and the parameters of the second-order fluid. The stress fields on the surface of a tri-axial ellipsoid depend strongly on the ratios of principal axes and are such as to suggest the formation of gas bubble with a round flat nose and two-dimensional cusped trailing edge. A thin flat trailing edge gives rise to a large stress which makes the thin trailing edge thinner.

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