A theoretical model for estimation of drag force in the flow of non-newtonian fluids around spherical solid particles

Ceylan K., Herdem S., Abbasov T.

POWDER TECHNOLOGY, cilt.103, ss.286-291, 1999 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 103 Konu: 3
  • Basım Tarihi: 1999
  • Doi Numarası: 10.1016/s0032-5910(99)00025-x
  • Sayfa Sayıları: ss.286-291


A theoretical approach for estimation of the drag correlation coefficients in the flow of Newtonian or weak non-Newtonian liquids around spherical solid particles is presented. Some new analytical relations are derived by using a stream function and the energy dissipation equation to approximate the drag coefficients to the experimental data. It is shown that these relationships can be applicable in a wide range of Reynolds number, Re, up to Re < 1000 for the liquids with a flow behavior index, n, in the range of 0.5 < n < 1. The predicted coefficients from these relationships are in very good agreement with the experimental data given in the literature. (C) 1999 Elsevier Science S.A. All rights reserved.