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

Drag force on a rigid spheroidal particle in a cylinder filled with Carreau fluid

“…Missirlis et al [19] estimated the drag coefficient of a rigid sphere moving near the wall of a circular tube filled with a powerlaw shear-thinning fluid under conditions of creeping flow. Ceylan et al [20] calculated the drag force on a rigid particle settling in a power-law fluid; the result of simulation was found to be consistent with experimental observations. Their result is applicable to Reynolds numbers up to 1000 and the parameter characterizing a power-law fluid in the range 0.5 to 1.…”

Drag on non-spherical particles in power law non-Newtonian media

“…Therefore, over the years, considerable work has been reported on formulating reliable and accurate predictive schemes for estimating the drag force on a particle and/ or the free falling velocity of particles in fluids. In spite of the fact that very few applications entail the use of perfectly spherical particles, the bulk of the available literature on this topic relates to spherical particles in both Newtonian and non-Newtonian liquids (Chhabra, 1993;Ceylan et al, 1999;Wilson et al, 2003;Renaud et al, 2004;Kelessidis, 2004, for instance). This is in part 0301-7516/$ -see front matter D 2005 Elsevier B.V. All rights reserved.…”

Sedimentation of a cylindrical particle in a Carreau fluid

“…In a study of the wall effect on the motion of a particle under creeping flow condition Missirlis et al [20] evaluated the drag coefficient for the case when a rigid sphere is in a cylinder filled with a power-law fluid. Ceylan et al [21] proposed a theoretical model for the estimation of the drag force on a rigid sphere in a power-law fluid. The applicability of the model proposed was justified by experimental observations [22], and it was found that it is applicable for Reynolds number up to 1000.…”