Results 171 to 180 of about 910,115 (197)

Shear flow of a Newtonian fluid over a quiescent generalized Newtonian fluid

Meccanica, 2016
The flow of an upper shear-driven Newtonian fluid above an otherwise still non-Newtonian fluid is considered. The lower fluid is modelled as a generalized Newtonian fluid and set into motion by interfacial shear. By means of similarity transformations, the governing partial differential equations for the two-fluid problem transform exactly into two ...
Swati Mukhopadhyay, Swati Mukhopadhyay, Helge I. Andersson   +2 more
openaire   +2 more sources

A revisitation of generalized Newtonian fluids

Journal of Rheology, 2020
Creating an entry vortex growth simulation to show viscous and elastic fluid behaviors has always been a major challenge for the computational rheology of well-characterized polymer melts with extension thickening. For one thing, it is difficult to ensure stable convergence and reliable solutions via the viscoelastic constitutive equations at a ...
openaire   +2 more sources

Mixing of a Generalized Newtonian Fluid in a Cavity

Journal of Fluids Engineering, 1995
Mixing of a generalized Newtonian fluid in a corotating discontinuous cavity flow is studied. The flow period and the rheological coefficients are used as parameters. Using geometrical construction of periodic orbits and bifurcation analysis we find mixing windows in the parameter space.
X. Zhang, F. H. Ling
openaire   +2 more sources

Saffman-Taylor instability for generalized Newtonian fluids

Physical Review E, 2009
We study theoretically the linear Saffman-Taylor instability for non-Newtonian fluids in a Hele-Shaw cell. After introducing the notion of generalized Newtonian fluid we calculate the associated Darcy's law. We derive the relation governing the growth rate of normal modes for a large class of non-Newtonian flows. For shear-thinning fluids at high shear
Miguel Manna, Serge Mora
openaire   +3 more sources

Non-homogeneous generalized Newtonian fluids

Mathematische Zeitschrift, 2007
We show the existence of weak solutions to the system describing the motion of incompressible, non-homogeneous generalized Newtonian fluids if the extra stress tensor S(ρ, D) possesses p-structure with $${p \ge \frac {3d+2}{d+2}}$$ and variable viscosity.
Frehse, Jens, Růžička, Michael
openaire   +3 more sources

Semi‐implicit Euler Scheme for Generalized Newtonian Fluids

SIAM Journal on Numerical Analysis, 2006
Rheological behavior of certain non-Newtonian fluids in engineering sciences is often modeled by power law ansatzes with p \leq 2. So far, existing numerical analysis for local strong solutions studies a fully implicit time discretization and find only restricted ranges of admissible p's for corresponding error estimates [A. Prohl and M.
Diening, Lars, Prohl, Andreas, Růžička, Michael   +2 more
openaire   +3 more sources

Material Functions for Generalized Newtonian Fluids

Transactions of the Society of Rheology, 1970
The concept of the generalized Newtonian fluid (GNF) provides a useful basis for the formulation of constitutive equations for real materials. The purpose of this paper is to review the rational foundations of the generalized Newtonian fluid, and to discuss the problems involved in its practical application to real materials.
openaire   +2 more sources

Scaling in pinch-off of generalized Newtonian fluids

Journal of Non-Newtonian Fluid Mechanics, 2003
Abstract Pinch-off dynamics of slender liquid bridges of generalized Newtonian fluids without and with inertia are studied using asymptotic analysis and numerical computation. The deformation-rate-dependent rheology is described by power law and Carreau models.
Ozgur Emek Yildirim, Pankaj Doshi, Gareth H. McKinley, Ronald Suryo, Osman A. Basaran   +4 more
openaire   +2 more sources

Generalized Newtonian Fluids

2013
The constitutive equations for an incompressible Newtonian fluid are defined by equation ( 4.3.3) in a Cartesian coordinate system ...
openaire   +2 more sources

Decay of the Swirl of Flow of a Generalized Newtonian Fluid

Journal of Engineering Physics and Thermophysics, 2018
Results of numerical investigations of the decay of swirl in laminar flow of a generalized Newtonian fluid in a circular pipe have been presented. The authors used water and a 0.67% Na–CMC aqueous solution as the working medium. A comparative analysis has been made of the obtained results and the results of other authors.
E. K. Vachagina, B. R. Abaidullin, A. I. Kadyirov   +2 more
openaire   +2 more sources