Viscoplastic Fluid
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Rheology of mine tailings deposits for dam break analyses
Abstract This article deals with the rheology of tailings deposits related to dam break analysis. The material used was a fine tailings from iron ore processing. Geotechnical and rheological characterization of these tailings were performed. The rheological characterization consisted of rotational and oscillatory tests. It was observed that the rheological p
REM, Int. Eng. J.. Publicado em: 2021-06
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2. NUMERICAL STUDY OF VISCOPLASTIC FLOW IN A T-BIFURCATION: IDENTIFICATION OF STAGNANT REGIONS
Abstract Identification of stagnant regions of viscoplastic fluid flows in production lines and equipment is of paramount importance owing to potential material degradation and process contamination. The present work introduces an assessment strategy to identify, classify and quantify unyielded regions with the objective of optimizing the flow conditions wit
Braz. J. Chem. Eng.. Publicado em: 09/12/2019
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3. Aproximações estabilizadas de escoamentos de fluidos viscoplásticos através de uma expansão seguida de uma contração axissimétrica
The effect of inertia in the flow of viscoplastic fluids through an expansion followed by a contraction is analyzed. The mechanical behavior is modeled by the Generalized Newtonian Fluid constitutive equation, with the viscosity function given by the SMD equation (de Souza Mendes and Dutra, 2004). The conservation equations of mass and momentum, together wit
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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4. 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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5. Uma investigação numérica de escoamentos planares de fluidos Herschel-Bulkley regularizados empregando um método multi-campos de Galerkin mínimos-quadrados / An numerical investigation of the planar flow of the herschel-bulkley fluids regularized employing a method multi-field of Galerkin least-squares
A grande maioria dos fluidos encontrados na natureza se comportam como fluidos não- Newtonianos o que torna o seu estudo muito importante para diversas áreas da engenharia. Este trabalho tem como objetivo simular o problema específico de escoamentos de fluidos viscoplásticos em expansões abruptas planares com razão de aspecto de 1:4. O problema em ques
Publicado em: 2009
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6. Aproximação de Galerkin mínimos-quadrados de escoamentos axissimétricos de fluido Herschel-Bulkley através de expansões abruptas / Galerkin least-squares approximations for herschel bulkley fluid flows through an axisymmetric abrupts expansions
O estudo de escoamentos de fluidos não-Newtonianos através de expansões desperta um grande interesse em pesquisadores nas diversas áreas da engenharia, devido a sua ampla aplicação em indústrias e no meio acadêmico. O objetivo principal desta Dissertação é simular problemas de escoamentos envolvendo fluidos viscoplásticos através de expansões a
Publicado em: 2008
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7. UMA ABORDAGEM LAGRANGEANA PARA SIMULAÇÃO DE ESCOAMENTOS DE FLUIDOS VISCOPLÁSTICOS E MULTIFÁSICOS / A LAGRANGIAN APPROACH FOR SIMULATING VISCOPLASTIC AND MULTIPHASE FLUIDS
In the last decade in Computer Graphics, they were development many techniques to simulate the behavior of objects such as rigid bodies, water, smoke, hair and cloth. While these techniques focus in simplifled physical models through monophase fluids or ideal solids, we propose new simulation techniques of viscoplastic and multiphase fluids based on a lagran
Publicado em: 2007
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8. CONVECÇÃO FORÇADA EM ESCOAMENTOS LAMINARES DE LÍQUIDOS VISCOPLÁSTICOS EM TUBOS E ESPAÇOS ANULARES / FORCED CONVECTION IN LAMINAR FLOWS OF VISCOPLASTIC LIQUIDS THROUGH TUBES AND ANNULI
Non-Newtonian fluids flow are very common in industrial processes, so it is important to know both the effect of the process on the fluid and vice-versa. Non-Newtonian Fluids exhibit complex mechanical behavior not found in Newtonian fluids, such as shear-rate-dependent viscosity and non-zero Yield stress. Nowadays there is a lack of understanding in the lit
Publicado em: 2004
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9. TAYLOR-COUETTE INSTABILITY IN VISCOPLASTIC FLUID FLOW / INSTABILIDADE DE TAYLOR-COUETTE EM ESCOAMENTOS DE FLUIDOS VISCOPLASTICOS
A superposição de um escoamento circular de Couette e um fluxo com gradiente de pressão axial, através de um espaço anular ocorre em muitas aplicações práticas, tais como: reatores químicos catalíticos, filtros, extratores líquido- líquido, mancais e o fluxo de retorno de lamas de perfuração entre a coluna de perfuração rotatória e a formaç
Publicado em: 2002