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http://dx.doi.org/10.6112/kscfe.2014.19.4.061

NUMERICAL STUDY ON THE CHARACTERISTICS OF NON-NEWTONIAN FLUID FLOW OVER OBSTACLE  

Kim, Hyung Min (Dept. of Mechanical System Engineering, Kyonggi University)
Publication Information
Journal of computational fluids engineering / v.19, no.4, 2014 , pp. 61-67 More about this Journal
Abstract
Since the most of the existing non-Newtonian models are not adequate to apply to the lattmce Boltzmann method, it is a challenging task from both the theoretical and the numerical points of view. In this research the hydro-kinetic model was modified and applied to the 3-D moving sphere in the circular channel flow and the characteristics of the shear thinning effect by the HK-model was evaluated and the condition of ${\Gamma}$ in the model was suggested for the stable simulation to generate non-trivial prediction in three dimension strong shear flows. On the wall boundaries of circular channel the curved wall surface treatment with constant velocity condition was applied and the bounceback condition was applied on the sphere wall to simulate the relative motion of the sphere. The condition is adequate at the less blockage than 0.7 but It may need to apply a multi-scale concept of grid refinement at the narrow flow region. to obtain the stable numerical results.
Keywords
Lattice Boltzmann Method; Hydor-kinetic model; Shear thinning flow;
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Times Cited By KSCI : 1  (Citation Analysis)
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