Eulerian Model
Mostrando 13-24 de 38 artigos, teses e dissertações.
-
13. Modelagem multifasica Euleriana-Euleriana para simulação numerica de ciclones / Eulerian-Eulerian approach for numerical simulation of cyclones
In this work it is presented the computational code CYCLO, which is a program developed specifically to predict the dynamic behavior of the gas-solid flow in cyclones. The cyclones have been used extensively in many industries for a long time for separating the particles from gaseous streams. Since the beginning of the industrialization until the present tim
Publicado em: 2007
-
14. STUDY OF TURBULENT DIFUSION EMPLOYING LAGRANGIAN STOCHASTIC MODELS / ESTUDO DA DIFUSÃO TURBULENTA EMPREGANDO MODELOS ESTOCÁSTICOS LAGRANGEANOS
In this work, the Lagrangian stochastic particle model LAMBDA is utilized to simulate the dispersion and the transport of contaminants under different atmospheric conditions. The analysis employs three different field experiments of atmospheric diffusion: the Copenhagen experiment, which was accomplished in unstable conditions, the Prairie Grass experiment i
Publicado em: 2007
-
15. Transporte de partículas induzido por ondas de deriva / Particle transport induced by drift waves
We investigate the chaotic particle transport by resonant drift waves propagating in tokamaks plasma edges with ~E × ~B poloidal zonal flow, a critical problem for the understanding of the confinement properties of fusion plasmas. We assume, for large aspect ratio tokamaks, a non integrable hamiltonian model (proposed by Horton) to describe the non linear d
Publicado em: 2007
-
16. Mathematical modeling and numerical simulation of incompressible flows over complexes three-dimensional geometries using the immersed boundary method / Modelagem matemática e simulação numérica de escoamentos incompressíveis sobre geometrias complexas tridimensionais utilizando o método da fronteira imersa
The necessity of understand the physical mechanisms in flows over complexes geometries are something imperative on modern engineering. In this way, tools that allow the analysis and understanding of such flows are very important as well. In this work, a numerical tool that allows the transient analysis of flows over several types of complexes three-dimension
Publicado em: 2007
-
17. Mathematical modeling and numerical simulation of incompressible flows over complexes three-dimensional geometries using the immersed boundary method / Modelagem matemÃtica e simulaÃÃo numÃrica de escoamentos incompressÃveis sobre geometrias complexas tridimensionais utilizando o mÃtodo da fronteira imersa
The necessity of understand the physical mechanisms in flows over complexes geometries are something imperative on modern engineering. In this way, tools that allow the analysis and understanding of such flows are very important as well. In this work, a numerical tool that allows the transient analysis of flows over several types of complexes three-dimension
Publicado em: 2007
-
18. Estudo experimental e de simulação da fluidodinâmica de um leito de jorro com tubo Draft
The spouted bed has been used in several processes as drying, granulation, catalytic polymerization, residues treatment and materials coating. This application is due to the excellent fluid-particle contact and to the characteristics of the solids circulation. In spite of its extensive application, the spouted bed has some scale-up limitations, so its necess
Publicado em: 2007
-
19. Estudo experimental e de simulaÃÃo da fluidodinÃmica de um leito de jorro com tubo Draft
The spouted bed has been used in several processes as drying, granulation, catalytic polymerization, residues treatment and materials coating. This application is due to the excellent fluid-particle contact and to the characteristics of the solids circulation. In spite of its extensive application, the spouted bed has some scale-up limitations, so itâs nece
Publicado em: 2007
-
20. Estudo experimental e de simulação da fluidodinâmica e recobrimento em leito de jorro
The spouted bed technique has found application in many industrial processes such as drying of granular materials, blending of polymer chips, coating of tablets, and granulation of fertilizers and other materials. Although has an extensive application, the mechanisms of solids movement in spouted beds are still not completely understood. The knowledge of the
Publicado em: 2006
-
21. Simulação de escoamentos gás-sólido reativos em leitos fluidizados circulantes / Simulation of reactive gas-solid flows in circulating fluidized beds
Circulating fluidized bed reactors are widely used in large scale applications such as catalytic cracking of petrol and coal combustion. Development and design in those areas are strongly based on demonstration plants, at extremely high costs. In this context, treatments applying computational fluid mechanics assume considerable relevance. The complex gas-so
Publicado em: 2006
-
22. Identificação e monitoramento de regimes de escoamento em leito de jorro
Spouted bed has been studied intensively because of its potential of application in several processes. Identification and characterization of flow regimes in spouted bed based on visual observation have been reported in literature. However, the characterization of flow regimes based on visual observation is not either usual or possible in industrial equipmen
Publicado em: 2006
-
23. Numerical simulation of fluid flow in CFB risers: A turbulence analysis approach
Turbulence parameters are derived from results of numerical simulation of gas-solid flow in circulating fluidized bed (CFB). A two fluid model with constant viscosity is applied considering an Eulerian continuum approach for both phases. An analysis is performed using a direct numerical integration of balance equations without an explicit use of any turbulen
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2005-06
-
24. A study of the fluid dynamics of the spouted bed using CFD
The spouted bed has been used in drying, granulation, catalytic polymerization, residue treatment and coating of several materials. Its success is attributed to its solids circulation characteristics and excellent gas-particle contact. In this work the pattern of solids and gas flows in a spouted bed was numerically simulated using a Eulerian multiphase mode
Brazilian Journal of Chemical Engineering. Publicado em: 2005-06