viscous flow


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viscous flow

n
(General Physics) another name for streamline flow
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The Poiseuille flow is also known as viscous flow. The assumption that the pore resembles a perfect cylinder is necessary to model the viscous flow in the pore [11].
Among their topics are modeling multiple fatigue crack growth in heterogeneous structural systems using the dual boundary element method, boundary integral methods in bio-electromagnetic and biomedical applications of electromagnetic fields, the high performance of local mesh-free methods with reduced integration, multi-domain singular boundary method for two-dimensional laminar viscous flow, and the implicit modeling of geological structures: a Cartesian grid method handling discontinuities with ghost points.
where A is a proportionality constant, [E.sub.w] is the apparent activation energy for viscous flow, R is the gas constant and T is the absolute temperature.
where [[eta].sub.0] is a constant, which is decided by the nature of the material, [E.sub.a,V] the activation energy for viscous flow, R the gas constant, and T the Kelvin temperature.
When implementing CFD simulations, (2), (3), and (4) are solved by the semi-implicit method for pressure-linked equations (SIMPLE) [17], which has been widely used to compute incompressible viscous flow problems.
Effect of [B.sub.2][O.sub.3] on the Apparent Activation Energy for Viscous Flow. Temperature dependence of viscosity ([eta]) is given by the Arrhenius equation (see (1)), from which the apparent activation energy can be derived.
In recent studies [6-8], gas transport mechanisms in organic matter can be described by continuum flow, slip flow viscous flow, the Knudsen diffusion, and transition flow.
A numerical method for solving incompressible viscous flow problems, Journal of Computational Physics 2: 12-26.
where h is a viscous flow constant and R is the gas constant, [E.sub.[eta]] is viscous flow activation energy of the polymer melt, the larger viscous flow activation energy, the more sensitive the viscosity is to the temperature.
Laminar viscous flow regime occurs when Rayleigh numbers Ra < 8 x [10.sup.5] and laminar viscous-gravitational mode w hen Ra > 8 x [10.sup.5].
Macroscopic phenomenological description of local materials flow within polymeric systems under external working by pressure is closely associated with modern problems of nonequilibrium thermodynamics of irreversible processes, classical continuum mechanics, Computational Fluid Dynamics (CFD) [9, 13, 14, 17, 19, 20, 30, 32, 34, 35], rheodynamics and rheology [29], rheomechanics and rheophysics [30], polymer physics and chemistry [32, 34], material kinetics [31], complex macromolecule networks, chemical engineering of polymers, chemical technology of complex fluids, material working by pressure [1-27], medical applications, and phenomenological continuum-based theories of polymer viscous flow [29-32, 34].