An experimental study on flow structures of a single bubble rising in a shear-thinning viscoelastic fluid with a new measurement technique

2005 ◽  
Vol 31 (2) ◽  
pp. 239-252 ◽  
Author(s):  
Tsao-Jen Lin ◽  
Gen-Ming Lin
Keyword(s):  
Experimental Study ◽  
Viscoelastic Fluid ◽  
Measurement Technique ◽  
Shear Thinning ◽  
Single Bubble ◽  
Flow Structures ◽  
Bubble Rising

Numerical simulation of single bubble rising in shear-thinning fluids by level set method

2016 ◽  
Vol 23 (4) ◽  
pp. 1000-1006 ◽  
Author(s):  
Shao-bai Li ◽  
Zheng Yan ◽  
Run-dong Li ◽  
Lei Wang ◽  
Jing-de Luan
Keyword(s):  
Numerical Simulation ◽  
Level Set Method ◽  
Level Set ◽  
Shear Thinning ◽  
Single Bubble ◽  
Shear Thinning Fluids ◽  
Bubble Rising

Experimental Study of Bubble Motion in Mercury With and Without a Magnetic Field

1977 ◽  
Vol 99 (3) ◽  
pp. 404-410 ◽  
Author(s):  
Y. Mori ◽  
K. Hijikata ◽  
I. Kuriyama
Keyword(s):  
Magnetic Field ◽  
Experimental Study ◽  
Experimental Results ◽  
New Method ◽  
Single Bubble ◽  
Rise Velocity ◽  
Bubble Motion ◽  
Spherical Cap ◽  
Equivalent Radius ◽  
Bubble Rising

The behavior and hydrodynamical performance of a single bubble rising through mercury with and without magnetic field has been studied experimentally. A new method to measure the rise velocity and the shape of bubble with an electrical triple probe is proposed. When there is no magnetic field, a bubble changes its shape from spherical to elliptic and then to a spherical cap shape, as its equivalent radius Rm changes from 0.1 to 3 mm. The experimental results are found to agree well with the theories reported so far. In the case of a magnetic field, it is found that the effect of intensity of magnetic field B on the rise velocity depends largely on the radius of a bubble. When Rm = 3 mm, the rise velocity decreases monotonically with the increase of B. However, when Rm = 1 mm, the rise velocity increases once but it then starts to decrease afterwards with the increase of B.

Experimental study of single-bubble behavior containing aerosol during pool scrubbing

2019 ◽  
Vol 348 ◽  
pp. 159-168 ◽  
Author(s):  
Kota Fujiwara ◽  
Wataru Kikuchi ◽  
Yuki Nakamura ◽  
Tomohisa Yuasa ◽  
Shimpei Saito ◽  
...  
Keyword(s):  
Experimental Study ◽  
Single Bubble ◽  
Bubble Behavior

Dynamics of a gas bubble rising through a thin immersed layer of granular material: an experimental study

2002 ◽  
Vol 4 (2) ◽  
pp. 39-44 ◽  
Author(s):  
L. Gostiaux ◽  
H. Gayvallet ◽  
J.-C. Géminard
Keyword(s):  
Experimental Study ◽  
Granular Material ◽  
Gas Bubble ◽  
Bubble Rising

Oscillatory Natural Convection of a Liquid Metal in Circular Cylinders

1994 ◽  
Vol 116 (3) ◽  
pp. 627-632 ◽  
Author(s):  
Y. Kamotani ◽  
F.-B. Weng ◽  
S. Ostrach ◽  
J. Platt
Keyword(s):  
Experimental Study ◽  
Natural Convection ◽  
Liquid Metal ◽  
Oscillatory Flow ◽  
Circular Cylinders ◽  
Flow Structures ◽  
Supercritical Flow ◽  
Aspect Ratios ◽  
Oscillation Frequencies ◽  
Rayleigh Numbers

An experimental study is made of natural convection oscillations in gallium melts enclosed by right circular cylinders with differentially heated end walls. Cases heated from below are examined for angles of inclination (φ) ranging from 0 deg (vertical) to 75 deg with aspect ratios Ar (height/diameter) of 2, 3, and 4. Temperature measurements are made along the circumference of the cylinder to detect the oscillations, from which the oscillatory flow structures are inferred. The critical Rayleigh numbers and oscillation frequencies are determined. For Ar=3 and φ = 0 deg, 30 deg the supercritical flow structures are discussed in detail.

Topological Flow Structures of Annular Swirling Jets

2001 ◽  
Vol 17 (3) ◽  
pp. 131-138
Author(s):  
Feng Chin Tsai ◽  
Rong Fung Huang
Keyword(s):  
Vortex Breakdown ◽  
Swirling Flow ◽  
Single Bubble ◽  
Flow Structures ◽  
Complex Flow ◽  
Swirl Number ◽  
Recirculation Bubble ◽  
Annular Jet ◽  
Ring Mode ◽  
Dual Ring

AbstractThe effects of blockage and swirl on the macro flow structures of the annular jet past a circular disc are experimentally studied through the time-averaged streamline patterns. In the blockage-effect regime, the flows present multiple modes, single bubble, dual rings, vortex breakdown, and triple rings, in different regimes of blockage ratio and swirl number. The topological models of the flow structures are proposed and discussed according to the measured flow fields to manifest the complex flow structures. The single bubble is a closed recirculation bubble with a stagnation point on the central axis. The dual-ring flow is an open-top recirculsation zone, in which a pair of counter-rotating vortex rings exists in the near wake. The fluids in the dual rings are expelled downstream through a central jet-like swirling flow. A vortex breakdown may occur in the central jet-like swirling flow if the exit swirl number exceeds critical values. When the vortex breakdown interacts with the dual rings, a complex triple-ring flow structure forms. Axial distributions of the local swirl number are presented and discussed. The local swirl number increases with the increase of the exit swirl number and attains the maximum in the dual-ring mode. At large exit swirl numbers where the vortex breakdown occurs, the local swirl number decreases drastically to a low value.

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