Bingham Equation
Mostrando 1-4 de 4 artigos, teses e dissertações.
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1. A numerical investigation of inertia flows of Bingham-Papanastasiou fluids by an extra stress-pressure-velocity galerkin least-squares method
This article is concerned with finite element approximations for yield stress fluid flows through a sudden planar expansion. The mechanical model is composed by mass and momentum balance equations, coupled with the Bingham viscoplastic model regularized by Papanastasiou (1987) equation. A multi-field Galerkin least-squares method in terms of stress, velocity
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-12
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2. Escoamento de fluídos pseudoplásticos e viscoplásticos: avaliação analítica e aproximação por elementos finitos / Pseudoplastic and viscoplastic fluids flow: analitic avaliation and finit element aproximation
O presente trabalho objetiva a investigação teórica e numérica da dinâmica dos escoamentos dos fluidos industriais. A grande maioria destes fluidos, ao escoarem apresentam um comportamento reológico bem diverso dos apresentados pelos líquidos Newtonianos - sendo, portanto, conhecidos na literatura como fluidos não-Newtonianos. Neste trabalho são des
Publicado em: 2010
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3. Galerkin least-squares solutions for purely viscous flows of shear-thinning fluids and regularized yield stress fluids
This paper aims to present Galerkin Least-Squares approximations for flows of Bingham plastic fluids. These fluids are modeled using the Generalized Newtonian Liquid (GNL) constitutive equation. Their viscoplastic behavior is predicted by the viscosity function, which employs the Papanastasiou's regularization in order to predict a highly viscous behavior wh
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2007-12
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4. Rheodynamic lubrication of a squeeze film bearing under sinusoidal squeeze motion
Lubricants with variable viscosity are assuming importance for their applications in polymer industry, thermal reactors and in biomechanics. With the bearing operations in machines being subjected to high speeds, loads, increasing mechanical shearing forces and continually increasing pressures, there has been an increasing interest to use non-Newtonian fluid
Computational & Applied Mathematics. Publicado em: 2007