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A Study on the Helical Flow of Newtonian and non-Newtonian fluid  

Kim Young-Ju (Graduated School of Mechanical Engineering, Sungkyunkwan University)
Kim Chul-Soo (Automotive service and Technology Wonju National College)
Hwang Young-Kyu (Graduated School of Mechanical Engineering, Sungkyunkwan University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.17, no.1, 2005 , pp. 8-15 More about this Journal
Abstract
This study concerns the characteristics of helical flow in a concentric and eccentric annulus with a diameter ratio of 0.52 and 0.9, whose outer cylinders are stationary and inner ones are rotating. Pressure losses and skin friction coefficients have been measured for fully developed flows of water and $0.2\%$ aqueous of sodium carboxymethyl cellulose(CMC), respectively, when the inner cylinder rotates at the speed of $0\~500$ rpm. The effect of rotation on the skin friction coefficient is significantly dependent on the flow regime. In all flow regimes, the skin friction coefficient is increased by the inner cylinder rotation. This study shows the change of skin friction coefficient and wall shear stress corresponding to the variation of rotating speed of the inner cylinder, radius ratio, eccentricity, and working fluids.
Keywords
Transitional flow; Concentric annulus; Skin friction coefficient; Rotating flow; Critical Reynolds number;
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1 Escudier, M. P. and Gouldson, I. W., 1995, Concentric annular flow with centerbody rotation of a Newtonian and a shear-thinning liquid, Int. J. Heat and Fluid Flow., Vol. 16, pp. 156-162   DOI   ScienceOn
2 Wilkinson M. A, 1960, Non-Newtonian Fluids, Fluid Mechanics, Mixing and Heat Transfer, Pergamon press
3 Kim, Y. J., 2003, A study on the rotating flow in an annulus, Ph.D. thesis, U. of Sungkyunkwan, Sungkyunkwan, Korea
4 Escudier, M. P., Gouldson, I. W., Oliveira, P.J. and Pinho, F. T., 1995, Effects of inner cylinder rotation on laminar flow of a Newtonian fluid through an eccentric annulus, Int. J. Heat and Fluid Flow., Vol. 21, pp. 92-103   DOI   ScienceOn
5 Fredrickson, A. G., 1960, Helical Flow of an Annular Mass of Visco-elastic Fluid, Chem. Eng. Science, Vol. 11, pp. 252-259
6 Nouri, J. M., Umur, H. and Whitelaw, J. H., 1993, Flow of Newtonian and NonNewtonian Fluids in Concentric and Eccentric Annuli, J. Fluid Mech., Vol. 253, pp.617-641   DOI   ScienceOn
7 Shah, R. K. and London, A. L., 1978, Laminar Flow Forced Convection in Ducts, Academic Press New York
8 Delwiche, R. A., Lejeune, M. W. D. and Stratabit, D. B., 1992, Slimhole Drilling Hydraulics, Society of Petroleum Engineers Inc., SPE 24596, pp. 521-541
9 Nouri, J. M. and Whitelaw, J. H., 1994, Flow of Newtonian and Non-Newtonian Fluids in a Concentric Annulus With Rotation of the Inner Cylinder, J. Fluids Eng., Vol. 116, pp. 821-827   DOI   ScienceOn
10 Hwang, Y. K. and Kim, Y. J., 2002, pp. 1944-1949, Helical low Study on NonNewtonian Fluid in an Inclined Annulus with Rotating Inner Cylinder, Proc. of the KSME