For this reason, most CFD models are based on the simplified assumption that blood is a Newtonian fluid with a linear stress–strain rate (i.e., with a constant viscosity). Over one cardiac cycle the blood shear rate can vary from 0 to 1000 s−1; in large arteries particularly, the ...
Since the shear rate of a non-Newtonian fluid is of importance in fixing the rheological or viscometric behavior of such a material, the present study has ... AB Metzner,RE Otto - 《Aiche Journal》 被引量: 1570发表: 1957年 Rheology of non-Newtonian fluids: A new flow equation for pseud...
wall shear stressvelocity distributionThe effects of rheological behavior of blood and pulsatility on flow through an artery with stenosis have been investigated. Blood has been represented by a non-Newtonian fluid obeying Herschel鈥揃ulkley equation. Using the Reynolds number as the perturbation ...
(the deformation by shear forces) of non-Newtonian fluids depends on the shear rate3. Generally, in a Newtonian fluid, the relation between shear stress and shear rate is linear4,5,6,7. In a non-Newtonian fluid, however, this relationship can in principle assume any shape, from ...
of wetting out the wall surface evenly. Once applied, the paint regained its original higher viscosity, leaving your wall without drips and runs. This is what is called ashear thinningfluid, the exact opposite of shear thickening. Can you recall other fluids exhibiting a non-Newtonian behavior?
Modeling of non-Newtonian fluid flows in porous textile structures under RTM technologies In this paper, the investigation is devoted to the application of homogenization methods to the transport theory of non-Newtonian shear-thinning fluids in porous fabric structures. Mathematical model is proposed for...
Intrinsic density; modified parameter inHildebrand's fluidity equation; eq. [5] (kg m−3) τ: Shear stress (Nm−2) References Hildebrand, J. H., Viscosity and Diffusivity (New York 1977). Ree, T., H. Eyring, J. Appl. Phys.26, 793, 800 (1955). ...
These lubricants are therefore non-Newtonian and their nonlinear relations between shear stress and shear strain rate are generally represented by cubic shear stress laws. The Navier-Stokes equations and the continuity equation in cylindrical coordinates, representing the flow field in the clearance space...
This method is based on the generalized Newtonian fluid model. And the generalized viscosity of it is simplified to a non-linear function of the shear rate γ̇ or shear stress τ, η=τ/γ̇. Although it is applicable, it uses an average Newtonian constitutive equation by integrating ...
Telles and Massarani (1979) proposed a constitutive equation for the solid-liquid interaction in the flow of non-Newtonian fluids through porous media. By using principles of dimensional analysis, the authors defined the resistive force as an equation that accounts for inertial and normal stress eff...