Newtonian Fluid
Mostrando 13-24 de 91 artigos, teses e dissertações.
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13. Análise da convecção forçada no escoamento bidimensional laminar em dutos circulares em variáveis primitivas via GITT. / Analysis of the forced convection in the bidimensional laminar flow in circular ducts in primitive variable by GITT.
No presente trabalho a convecção forçada interna no escoamento laminar em desenvolvimento simultâneo é estudada aplicando a Técnica da Transformada Integral Generalizada para produzir um solução híbrida para os campos de velocidade, pressão e temperatura em dutos circulres. As equações da Continuidade, de Navier-Stokes, de Possion e da Energia s�
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/09/2012
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14. Métodos com passo temporal adaptativo para a simulação de escoamentos com superfícies livres / Adaptative time-step methods for the simulation of free surface flows
The simulation of free surfaces flows has gained importance in the recent years due to the many practical applications of this type of flow. Among the many numerical methods available for the simulation of fluid flows, there is GENSMAC, which is a numerical technique to simulate Newtonian flows with free surfaces. The implementation of semi-implicitmethods f
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/04/2012
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15. Distribuição do tempo de residência e letalidade no processamento térmico contínuo de líquidos com escoamento laminar não ideal em trocadores bitubulares. / Residence time distribution and lethality in the continuous thermal processing of liquids with non ideal laminar flow in bitubular exchangers.
Tubular heat exchangers are widely used for thermal processing of viscous liquid foods because they have larger hydraulic diameters than the plate heat exchangers. The calculation of lethality in this type of exchanger is directly related to velocity profile and the residence time distribution (RTD). For the laminar flow of viscous fluids, Newtonian and non-
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/03/2012
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16. Second law analysis for free convection in non-newtonian fluids over a horizontal plate embedded in a porous medium: (prescribed heat flux)
Second law characteristics of heat transfer and fluid flow due to free convection of non-Newtonian fluids over a horizontal plate with prescribed surface heat flux in a porous medium are analyzed. Velocity and temperature fields are obtained numerically using an implicit finite difference method under the similarity assumption and these results are used to c
Braz. J. Chem. Eng.. Publicado em: 2012-09
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17. Experimental investigation of the enhanced oil recovery process using a polymeric solution
Enhanced oil recovery methods are becoming an important source of oil production of wells that have already been explored and, by these methods, of increase of the total volume of oil extracted. An important example is the injection of polymeric solutions after the injected water has reached the breakthrough point. In the present work an experimental apparat
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012-09
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18. 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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19. Escoamento de fluidos complexos e transporte de partÃculas em geometrias irregulares. / Complex fluid flows and particle transport in irregular geometries.
In this work many types of incompressible laminar Newtonian and Non-Newtonian flows are studied. The interplay of these flows with complex geometries was investigated using computational modeling and numerical solution of the conservation of momentum and mass continuity equations. As a first step, the computational modeling of a network of pores was adopted
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/04/2011
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20. High-order finite volume method for solving viscoelastic fluid flows
Computational Fluid Dynamics (CFD) is widely used by polymer processing industries in order to evaluate polymeric fluid flows. A successful computational code must provide reliable predictions (modeling) in a fast and efficient way (simulation). In this work, a new approach to solve the governing equations of viscoelastic fluid flows is proposed. It is based
Publicado em: 2011
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21. Theoretical-experimental analyses of simple geometry saturated conductivities for a Newtonian fluid
The conductivity (K) of porous media represents an important physical parameter in several areas of knowledge. In saturated flow, the saturated conductivity (K0) is the most important parameter of porous system and it is related to the fluid and porous media properties. In order to evaluate the potential of a new tool for measuring K0, such as the computatio
Brazilian Journal of Physics. Publicado em: 2010-12
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22. Identification of non-newtonian rheological parameter through an inverse formulation
In this work, we introduce an inverse formulation to be applied in the identification of a rheological parameter associated to non-Newtonian fluids. It is built upon a creeping flow through a 4 to 1 axisymmetric abrupt contraction. The fluid is modeled by the Generalized Newtonian Fluid constitutive equation. The viscosity function is based on the one propos
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-06
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23. LIQUID-LIQUID DISPLACEMENT FLOWS IN A HELE-SHAW CELL INCLUDING NON-NEWTONIAN EFFECTS / DESLOCAMENTO DE LÍQUIDOS EM CÉLULA DE HELE-SHAW CONSIDERANDO EFEITOS NÃO NEWTONIANOS
This work studied the displacement of fluids in porous media using a Hele-Shaw cell. Specifically, was investigated experimentally the displacement of a non-Newtonian fluid by a Newtonian in a rectangular Hele-Shaw cell. The Saffman-Taylor or viscous fingering instability occurs when one fluid pushes a more viscous one, and a Hele-Shaw is a convenient tool t
Publicado em: 2010
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24. Secagem de biomassa de levedura (Saccharomyces cerevisiae) em um secador atmosferico condutivo com agitação mecanica : caracterização e avaliação do produto seco como bioadsorvente e complemento nutricional / Drying of yeast biomass (Saccharomyces cerevisiae) in a mechanically shaken conductive atmospheric dryer : characterization and evaluation of the dry material as bioadsorbent and nutritional complement
This thesis allowed evaluating the conductive atmospheric dryer with mechanical agitation, using glass beads as inert particles for drying a residue from brewery (yeast of Saccharomyces cerevisiae species) after being used eight times. The dryer was operated with the sediment load of yeast (150 g and 300 g), heating surface temperature (60 ºC and 90 ºC) an
Publicado em: 2010