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<strong>Nonlinear approach to flow instability of the orifice-centerline liquid induced by bubble chain rising in shear-thinning fluids</strong>

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Title Statement <strong>Nonlinear approach to flow instability of the orifice-centerline liquid induced by bubble chain rising in shear-thinning fluids</strong>
 
Added Entry - Uncontrolled Name Fan, Wenyuan ; Tianjin University of Technology
Yin, Xiaohong ; Tianjin University of Technology
National Natural Science Foundation of China;Tianjin Natural Science Foundation of China
 
Uncontrolled Index Term Bubble; Chaotic approach; Flow characteristic; Fractal analysis; Shear-thinning
 
Summary, etc. The flow characteristics of orifice<strong>-</strong>centerline liquid induced by bubble chain rising in carboxymethylcellulose (CMC) aqueous solution have been investigated using nonlinear analysis of the velocity measured by Laser Doppler Anemometry. Both axial and radial velocities are determined under various gas flow rates (<em>Q</em><sub>g</sub>), measurement heights (<em>z</em>) and mass concentrations. The results show that for low <em>Q</em><sub>g</sub>, <em>z</em> and dilute solution, the characteristic frequency of the power spectrum is consistent with bubbling frequency, with uniform elliptical shape of reconstructed phase space. Largest Lyapunov exponents <em>λ</em><sub>1</sub> in radial direction is approximately 10 times that in the axial direction. Whereas for high <em>Q</em><sub>g</sub>, <em>z</em> and concentrated solution, power spectrums are of broad coverage within low frequency range, with the compressed phase portrait and the raised <em>λ</em><sub>1</sub>. Especially, the liquid motion has a special feature of binary fraction in the present experiment.
 
Publication, Distribution, Etc. Indian Journal of Chemical Technology (IJCT)
2016-06-02 10:07:12
 
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http://op.niscair.res.in/index.php/IJCT/article/view/5570
 
Data Source Entry Indian Journal of Chemical Technology (IJCT); ##issue.vol## 23, ##issue.no## 3 (2016): Indian Journal of Chemical Technology
 
Language Note en
 
Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJCT/article/download/5570/13114
http://op.niscair.res.in/index.php/IJCT/article/download/5570/13115
http://op.niscair.res.in/index.php/IJCT/article/download/5570/13116
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http://op.niscair.res.in/index.php/IJCT/article/download/5570/13118
http://op.niscair.res.in/index.php/IJCT/article/download/5570/13119
http://op.niscair.res.in/index.php/IJCT/article/download/5570/13120
http://op.niscair.res.in/index.php/IJCT/article/download/5570/13121