Results 281 to 290 of about 89,189 (335)
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1984
Fluids give and flow under stress. Newtonians are the simplest of fluids, and they are characterized by the property that the velocity gradient at a point is proportional to the shear stress at that point, thus $$({\rm{Shear\;rate}})\alpha ({\rm{shear\;stress}})\;\;{\rm{or}}\;\;{{du} \over {dy}}\alpha \tau$$ All other fluids are called non ...
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Fluids give and flow under stress. Newtonians are the simplest of fluids, and they are characterized by the property that the velocity gradient at a point is proportional to the shear stress at that point, thus $$({\rm{Shear\;rate}})\alpha ({\rm{shear\;stress}})\;\;{\rm{or}}\;\;{{du} \over {dy}}\alpha \tau$$ All other fluids are called non ...
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Bubble Shape in Non-Newtonian Fluids
Journal of Applied Mechanics, 2002The study of the behavior of bubbles in complex fluids is of industrial as well as of academic importance. Bubble velocity-volume relations, bubble shapes, as well as viscous, elastic, and surfactant effects play a role in bubble dynamics. In this note we extend the analysis of Richardson to a non-Newtonian fluid.
De Kee, D. +2 more
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Sound Propagation in Non-Newtonian Fluids
Journal of Applied Mechanics, 1973A perturbation analysis is applied to the basic hydrodynamic equations and developed to determine the non-Newtonian effects of a small-signal plane wave propagating through a viscous fluid which is continuous, homogeneous, and isotropic. With the emphasis on liquids, the analysis is applied to the case of a Powell-Eyring fluid (which specializes to the
Raichel, D. R., Kapfer, W. H.
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Turbulence in Non-Newtonian Fluids
The Physics of Fluids, 1964The dissipation of turbulent energy is examined in incompressible isotropic fluids in which deformation depends only on current values of strain rate (Reiner-Rivlin fluids). For isotropic, homogeneous, decaying turbulence, two special cases are examined exactly—the Gaussian process and the inertial subrange.
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Classical Non-Newtonian Fluids
2016The aim of this section is to discuss the mathematical properties of the governing equations of some non-Newtonian fluids introduced in Chapter 2, Section 2.4, namely, the Reiner-Rivlin fluid and in particular, the Bingham fluid.
D. Cioranescu +2 more
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Entrance Flows of Non-Newtonian Fluids
Transactions of the Society of Rheology, 1973The creeping flow of a Powell-Eyring fluid through a sudden tubular contraction is considered, and finite difference solutions of the vorticity transport and stream function equations are obtained for a range of contraction ratios, fluid properties, and apparent shear rates.
Duda, J. L., Vrentas, J. S.
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1997
Abstract A new branch of fluid mechanics,Rheology, has rapidly been developed. It deals with non-Newtonian fluids which behave anomalously in comparison with Newtonian fluids. The anomaly is the variation in viscosity with the applied stress while the viscosity is constant for all Newtonian fluids.
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Abstract A new branch of fluid mechanics,Rheology, has rapidly been developed. It deals with non-Newtonian fluids which behave anomalously in comparison with Newtonian fluids. The anomaly is the variation in viscosity with the applied stress while the viscosity is constant for all Newtonian fluids.
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Simple Non-Newtonian Fluid Flows
1980Publisher Summary This chapter focuses on simple non-Newtonian fluid flows. Water and air, the most important fluids for life, are Newtonian fluids. However, there are many fluid materials of importance in nature and technology that are non-Newtonian fluids. Certain aspects of the flow behavior of such non-Newtonian fluids are markedly different from
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Stability of non-newtonian fluid flows
Journal of Applied Mechanics and Technical Physics, 2000The stability of non-Newtonian fluid films moving on inclined planes is studied within the two-parameter Ostwald-de Waele model with account taken of the surface tension and van der Waals forces. The problem is solved analytically in the linear formulation, and the evolution of finite-amplitude perturbations is determined numerically.
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