0108 Visualization and measurement of flow around a falling sphere in dilute wormlike micelle solutions

2015 ◽  
Vol 2015 (0) ◽  
pp. _0108-1_-_0108-2_
Author(s):  
Yoshiaki YAGI ◽  
Fumihiko MIKAMI
Keyword(s):  
Wormlike Micelle ◽  
Falling Sphere

Flow of a wormlike micelle solution past a falling sphere

2004 ◽  
Vol 116 (2-3) ◽  
pp. 205-234 ◽  
Author(s):  
Sheng Chen ◽  
Jonathan P. Rothstein
Keyword(s):  
Wormlike Micelle ◽  
Falling Sphere ◽  
Micelle Solution

Wall Effects On the Flow Dynamics of a Rigid Sphere in Motion

2021 ◽  
Author(s):  
Zhi-gang Feng ◽  
Jason Gatewood ◽  
E.E. Michaelides
Keyword(s):  
Hydrodynamic Force ◽  
Rotational Velocity ◽  
Analytical Data ◽  
Particle Diameter ◽  
Immersed Boundary ◽  
Rigid Sphere ◽  
Wall Effects ◽  
Falling Sphere ◽  
Dimensionless Ratio ◽  
Free Falling

Abstract The presence of a wall near a rigid sphere in motion is known to disturb the particle fore and aft flow field symmetry and to affect the hydrodynamic force. An Immersed Boundary Direct Numerical Simulation (IB-DNS) is used in this study to determine the wall effects on the dynamics of a free-falling sphere and the drag of a sphere moving at a constant velocity. The numerical results are validated by comparison to the published experimental, numerical, and analytical data. The pressure and velocity fields are numerically computed when the particle is in the vicinity of the wall; the transverse (lift) and longitudinal (drag) parts of the hydrodynamic force are calculated; its rotational velocity is also investigated in the case of a free-falling sphere. The flow asymmetry also causes the particle to rotate. The wall effect is shown to be significant when the dimensionless ratio of the wall distance to the particle diameter, L/D, is less than 3. The wall effects are more pronounced and when the particle Reynolds number, Re, is less than 10. Based on the computational results, a useful correlation for the wall effects on the drag coefficients spheres is derived in the range 0.75 < L/D < 3 and 0.18 < Re < 10.

scholarly journals 0103 Propagation of shear waves generated by a sedimenting sphere in wormlike micelle solutions

2014 ◽  
Vol 2014 (0) ◽  
pp. _0103-1_-_0103-3_
Author(s):  
Fumihiko MIKAMI ◽  
Akihiro ANDO ◽  
Masahiro YAMAMOTO
Keyword(s):  
Shear Waves ◽  
Wormlike Micelle

High-temperature viscosity measurements of hydrous albite liquid using in-situ falling-sphere viscometry at 2.5 GPa

2006 ◽  
Vol 229 (1-3) ◽  
pp. 2-9 ◽  
Author(s):  
Brent T. Poe ◽  
Claudia Romano ◽  
Christian Liebske ◽  
David C. Rubie ◽  
Hidenori Terasaki ◽  
...  
Keyword(s):  
High Temperature ◽  
Viscosity Measurements ◽  
Falling Sphere

The effect of pre-shear on the extensional rheology of wormlike micelle solutions

2007 ◽  
Vol 46 (6) ◽  
pp. 861-875 ◽  
Author(s):  
Avinash Bhardwaj ◽  
David Richter ◽  
Manojkumar Chellamuthu ◽  
Jonathan P. Rothstein
Keyword(s):  
Extensional Rheology ◽  
Wormlike Micelle
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