DRAG AND FALL VELOCITY OF A SPHERICAL-PARTICLE IN GENERALIZED NEWTONIAN AND VISCOPLASTIC FLUIDS

An approach to the calculation of drag and fall velocity of a spherica l particle in generalized Newtonian and viscoplastic fluids is suggest ed. It is based on the application of the modified Rabinowitsch-Mooney equation together with the corresponding relations for consistency va riables. The usefulness of this approach has been verified for the Ell is and Bingham fluids. The solution has been used to suggest the corre sponding relationships for the calculation of pressure drop in the flo w of a viscoplastic fluid through a random fixed bed of particles. (C) 1998 Elsevier Science S.A. All rights reserved.