Numerical Investigation of Internal Turbulent Flow Generated by a Flat-Blade Turbine and a Pitched-Blade Turbine in a Vessel Tank


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Abstract


The hydrodynamic behaviours induced by a flat-blade turbine and a pitched-blade turbine in a stirred vessel were numerically predicted by considering a computational fluid dynamic model. Solutions of the Naviers-Stokes equations in conjunction with the standard k–ε turbulence model were developed using a control volume discretization method. In this paper, the result obtained by our code, such as average velocity and turbulent flow characteristics, were presented in different vessel planes. The comparison of the flow pattern has been presented to be compared with ones found by other researchers. The good agreement between the numerical results and the experimental data of agitated tank validate our proposed model.
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Keywords


CFD; 3D Modelling; Turbulent; Flow; Flat-Blade; Pitched-Blade; Turbine

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References


P. M. Armenante, L. Changgen, C. Chou, I. Fort, J. Medek, Velocity profiles in a closed, unbaflled vessel: comparison between experimental LDV data and numerical CFD predictions, Chemical Engineering Science, vol. 52, n° 20, pp. 3483-3492, 1997.
http://dx.doi.org/10.1016/s0009-2509(97)00150-4

K. Suzukawa, S. Mochizukib, H. Osaka, Effect of the attack angle on the roll and trailing vortex structures in an agitated vessel with a paddle impeller, Chemical Engineering Science, 61, pp. 2791- 2798, 2006.
http://dx.doi.org/10.1016/j.ces.2005.10.063

M. F. W. Distelhoff, A. J. Marquis, Scalar mixing in the vicinity of two disk turbines and two pitched blade impellers, Chemical Engineering Science 55, pp. 1905-1920, 2000.
http://dx.doi.org/10.1016/s0009-2509(99)00464-9

Gul Ozcan-Taskin, Hongyuan Wei, The effect of impeller-to-tank diameter ratio on draw down of solids, Chemical Engineering Science 58, pp. 2011-2022, 2003.
http://dx.doi.org/10.1016/s0009-2509(03)00024-1

S. L. Conway, Azzeddine Lekhal, Johannes G. Khinast, Benjamin J. Glasser, Granular flowand segregation in a four-bladed mixer, Chemical Engineering Science 60, pp. 7091 – 7107, 2005.
http://dx.doi.org/10.1016/j.ces.2005.03.008

J. Aubin, N. Le Sauze, J. Bertrand, D.F. Fletcher, C. Xuereb, PIV measurements of flow in an aerated tank stirred by a down- and an up-pumping axial flow impeller, Experimental Thermal and Fluid Science 28, pp. 447–456, 2004.
http://dx.doi.org/10.1016/j.expthermflusci.2001.12.001

D. Dakshinamoorthy, A.R. Khopkar, J.F. Louvar, V.V. Ranade, CFD simulation of shortstopping runaway reactions in vessels agitated with impellers and jets, Journal of Loss Prevention in the Process Industries, vol. 19, pp. 570–581, 2006.
http://dx.doi.org/10.1016/j.jlp.2006.02.003

C. D. Taca, M. Paunescu, Power input in closed stirred vessels, Chemical Engineering Science, vol. 56, pp. 4445–4450, 2001.
http://dx.doi.org/10.1016/s0009-2509(01)00096-3

H. Kchaou, M. Baccar, M. Mseddi et M. S. Abid, Modélisation numérique de l’écoulement interne turbulent généré par une turbine radiale en cuve agitée, Revue Française de Mécanique, pp. 73-79, 2000.

M. Baccar, M. Mseddi, M. S. Abid, Contribution numérique à l’étude hydrodynamique et thermique des écoulements turbulents induits par une turbine radiale en cuve agitée, International journal of thermal sciences, Volume 40, Numéro 8, pp. 753-772, 2001.
http://dx.doi.org/10.1016/s1290-0729(01)01263-7

Z. Driss, H. Kchaou, M. Baccar, M. S. Abid, Caractérisation de la structure hydrodynamique dans une cuve agitée générée par une turbine à pales incurvées, pp. 1-6, 17ème Congrès Français de Mécanique, 29 août au 2 septembre 2005, Université de Technologie de Troyes, France, 2005.

Z. Driss, H. Kchaou, M. Baccar, M. S. Abid. Numerical investigation of internal laminar flow generated by a retreated-blade paddle and a flat-blade paddle in a vessel tank, International Journal of Engineering Simulation, pp. 10-16, Vol. 6, Number 3, ISSN 1468-1137, November 2005.

S. V. Patankar, Numerical heat transfer and fluid flow. Series in Computational Methods in Mechanics and Thermal Sciences, (McGraw Hill, New York, 1980).

J. Douglas, J. E. Gunn, A general formulation of alternating direction implicit methods, Num. Math. 6, pp. 428-453, 1964.
http://dx.doi.org/10.1007/bf01386093

S. Nagata, Mixing: principles and applications (Halstead press, Japan, 1975).


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