Freeflow 2d
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. 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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2. Solução numérica de escoamentos de cristais líquidos nemáticos / Numerical solution of nematic liquid crystals flows
O objetivo desse trabalho é desenvolver métodos numéricos para simular escoamentos de cristais líquidos nemáticos governados pelas equações dinâmicas de Ericksen-Leslie. São apresentados dois métodos numéricos para a simulação de escoamentos de cristais líquidos nemáticos. O primeiro método foi desenvolvido para simular escoamentos tridimensi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/08/2011
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3. Representação de superfícies livres utilizando partição da unidade implícita no sistema Freeflow / Free surface representation on freeflow using partition of unity implicits
Este trabalho consiste em introduzir uma nova abordagem de representação de superfície no ambiente de simulação Freeflow2D. Consiste em usar Partição da Unidade Implícita para estimar da superfície a geometria, normais e curvatura. Procurando se valer das vantagens de métodos do tipo meshless (sem malha) conservando no entanto a malha Lagrangiana,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/06/2011
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4. Desenvolvimento de estratégias de captura de descontinuidades para leis de conservação e problemas relacionados em dinâmica de fluídos / Development of strategies to capture discontinuities for conservation laws and related problems in fluid dynamics
Esta dissertação trata da solução numérica de problemas em dinâmica dos fluidos usando dois novos esquemas upwind de alta resolução, denominados FDPUS-C1 (Five-Degree Polynomial Upwind Scheme of C POT. 1Class) e SDPUS-C1 (Six-Degree Polynomial Upwind Scheme of C POT.1Class), para a discretização de termos convectivos lineares e não-lineares. Os es
Publicado em: 2010
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5. Solução numérica do modelo PTT para escoamentos viscoelásticos com superfícies livres / Numerical solution of the PTT model for viscoelastic surface flows
The aim of this work is to develop a numerical method capable of simulating viscoelastic free surface flows governed by the non-linear constitutive equation PTT (Phan-Thien-Tanner). In this work three numerical methods to simulate vicoelastic Flows of fluids modelled by the PTT equation are presented. Two of these methods were developed to simulate two-dimen
Publicado em: 2006
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6. Estratégias "upwind" e modelagem k-epsilon para simulação numérica de escoamentos com superfícies livres em altos números de Reynolds / Upwind strategies and k-epsilon modeling for numerical simulation of free surface flow at high Reynolds numbers
This work is devoted to the analysis and implementation of modern high-order upwind schemes and the standard k-epsilon turbulence model into the Freeflow-2D; a finite difference integrated environment for the numerical simulation of incompressible free surface flow problems. The purpose of this study is the two-dimensional simulation of high-Reynolds incompr
Publicado em: 2005
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7. "Simulação numérica de escoamentos viscoelásticos com superfície livre usando o ambiente FreeFlow-2D"
Este trabalho apresenta o desenvolvimento de um método numérico para simular escoamentos viscoelásticos com superfícies livres de um fluido governado pelo modelo de Oldroyd-B. As equações governantes para um fluido Oldroyd-B são consideradas. A derivada temporal é aproximada por um método de segunda ordem. Uma formulação para o cálculo do tensor
Publicado em: 2003
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8. Analysis and implementation of non-Newtonian models in FreeFlow-2D system. / Análise e implementação de modelos não newtonianos no sistema FreeFlow-2D
This work presents an extention of the Freeflow-2D system to non-Newtonian free surface flows. The governing equations are solved by the finite difference method on a staggered grid. Marker particles are used to describe the fluid providing the location and the visualization of the free surface. The methodology employed is based on the GENSMAC method. The fl
Publicado em: 2002
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9. Simulação numérica de escoamentos multifásicos utilizando o sistema FreeFlow-2D. / Numerical simulation of multi-phase flows using the FreeFlow-2D system.
This work describes a method to expand the applicability of the system FreeFlow-2D in multi-phase flows problems. This method allows the simulation of incompressible free surface multi-phase flows. An arbitrary number of phases having different properties can be used. Surface and interface tension effects are also considered. The numerical technique is based
Publicado em: 2001
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10. Secretion of bicarbonate by rat distal tubules in vivo. Modulation by overnight fasting.
We have performed microperfusion studies on distal tubule bicarbonate reabsorption (JtCO2) of fed and fasted rats to extend our previous observations of in vivo bicarbonate secretion and to resolve certain discrepancies between free-flow and microperfusion data. When rats are fasted overnight, as in previous free-flow studies, distal tubule microperfusion wi
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11. Major and Minor Receptor Group Human Rhinoviruses Penetrate from Endosomes by Different Mechanisms
Intercellular adhesion molecule 1 and the low-density lipoprotein receptor are used for cell entry by major and minor receptor group human rhinoviruses (HRVs), respectively. Whereas minor-group viruses, exemplified by HRV2, transfer their genomic RNA to the cytoplasm through a pore in the endosomal membrane (E. Prchla, C. Plank, E. Wagner, D. Blaas, and R. F
American Society for Microbiology.
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12. Mechanism of NaCl and water reabsorption in the proximal convoluted tubule of rat kidney.
The role of chloride concentration gradients in proximal NaCl and water reabsorption was examined in superficial proximal tubules of the rat by using perfusion and collection techniques. Reabsorptive rates (Jv), chloride concentrations, and transtubular potential difference were measured during perfusion with solutions (A) simulating an ultrafiltrate of plas