Showing papers by "Kumbakonam R. Rajagopal published in 1988"
TL;DR: In this article, the results of an experimental investigation on the flow of a non-Newtonian fluid between rotating, parallel disks are described, and the results are qualitatively different from those exhibited by linearly viscous fluids.
Abstract: The results of an experimental investigation on the flow of a non-Newtonian fluid between rotating, parallel disks are described in this paper. These results are qualitatively different from those exhibited by linearly viscous fluids in that a narrow layer of exceedingly high velocity gradients appears in the non-Newtonian fluid.
23 citations
TL;DR: In this paper, the authors considered the special case of the change of a reference configuration by uniaxial extension, and discussed the structure of the new material symmetry group, and showed that it includes non-orthogonal unimodular transformations.
21 citations
17 citations
TL;DR: In this paper, Parter and Rajagopal have proved the existence of solutions which do not possess axi-symmetry and discussed the analogous problems which arise within the context of viscoelastic fluids.
12 citations
TL;DR: In this article, the kinematics of an unsteady viscometric flow that is not curvilineal are discussed and the flow corresponds to nonhomogeneous oscillatory time dependent shear superposed on a rigid body rotation.
8 citations
TL;DR: In this article, the authors consider viscoelastic fluids which undergo an instantaneous homogeneous deformation consisting of shear superposed on triaxial extension and present universal relations involving the stress and deformation components.
Abstract: The note considers viscoelastic fluids which undergo an instantaneous homogeneous deformation consisting of shear superposed on triaxial extension. Two relations involving the stress and deformation components are presented, which are valid for all such fluids, and hence are termed “universal relations”. The first contains the Lodge-Meissner relation as a special case; the second arises when a block is deformed by shear traction only. It relates dimensional changes to the amount of shear.
4 citations