Unstructured Grids
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. ON THE PERFORMANCE OF DIFFERENT RANS BASED MODELS TO DESCRIBE THE TURBULENT FLOW IN AN AGITATED VESSEL USING NON-STRUCTURED GRIDS AND PIV VALIDATION
ABSTRACT The performances of the Standard κ-ε, RNG, Realizable, κ-ω and RSM turbulence models to describe the behavior of the flow in agitated tank reactors were evaluated. Because most of these tanks have complex geometries, structured meshing schemes are not a practical alternative in engineering. Two particular unstructured meshing schemes composed of
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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2. A TVD scheme for 3d unstructured grids applied to compositional reservoir simulation
Abstract In reducing the grid orientation effect for the numerical solution of partial differential equations, interpolation functions play an important role when the advective transport of the governing equations is considered. This is due to the fact that, in general, the unknowns are evaluated in the vertices of the elements and such properties must be ex
Braz. J. Chem. Eng.. Publicado em: 2017-10
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3. A New Algorithm for Shock Sensor Calculation at Supersonic Speeds on a 3D-Unstructured Grid
ABSTRACT In this paper, 3-Dsupersonic flow around two types of wings is solved using a new algorithm for shock sensor calculation. A dual-time-stepping implicit method with 2nd-order accuracy is used for time integration of the equations. In each real time step, the non-linear system of equations is solved by iterating in pseudo-time, using a multi-step inte
J. Aerosp. Technol. Manag.. Publicado em: 2016-12
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4. 3D COMPOSITIONAL RESERVOIR SIMULATION IN CONJUNCTION WITH UNSTRUCTURED GRIDS
Abstract In the last decade, unstructured grids have been a very important step in the development of petroleum reservoir simulators. In fact, the so-called third generation simulators are based on Perpendicular Bisection (PEBI) unstructured grids. Nevertheless, the use of PEBI grids is not very general when full anisotropic reservoirs are modeled. Another p
Braz. J. Chem. Eng.. Publicado em: 2016-06
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5. Hardware-assisted visibility sorting for unstructured volume rendering
Harvesting the power of modern graphics hardware to solve the complex problem of real-time rendering of large unstructured meshes is a major research goal in the volume visualization community. While, for regular grids, texture-based techniques are well-suited for current GPUs, the steps necessary for rendering unstructured meshes are not so easily mapped to
Publicado em: 2011
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6. Nonlinear turbulent transonic flow phenomena influence on aeroelastic stability analysis.
The present work is aimed at studying the influence of viscous effects in transonic aeroelastic analyses. To achieve this goal, a two-dimensional and viscous aeroelastic computational solver, for CAE analysis, is developed, which uses unstructured computational meshes and which is able to capture the main aeroelastic phenomena relevant in the transonic regim
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/12/2010
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7. Nonlinear turbulent transonic flow phenomena influence on aeroelastic stability analysis.
The present work is aimed at studying the influence of viscous effects in transonic aeroelastic analyses. To achieve this goal, a two-dimensional and viscous aeroelastic computational solver, for CAE analysis, is developed, which uses unstructured computational meshes and which is able to capture the main aeroelastic phenomena relevant in the transonic regim
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/12/2010
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8. Order of accuracy study of unstructured grid finite volume upwind schemes
A detailed numerical study is presented of the order of accuracy of some proposed cell centered, finite volume schemes used for the solution of the 2-D gasdynamic equations on triangular unstructured grids. The schemes studied are based on a MUSCL-type linear reconstruction of interface properties, which seeks to achieve 2nd-order accuracy in space. They are
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-03
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9. A survey of GPU-Based volume rendering of unstructured grids
A visualização volumétrica de grandes malhas não estruturadas é uma das principais metas da comunidade de visualização científica. Enquanto que em grades regulares o uso de técnicas baseadas em textura são adequadas para as Unidades de Processamento Gráfico (GPUs) atuais, os passos necessários para exibir malhas não estruturas não são diretame
Publicado em: 2010
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10. A comparative study of implicit and explicit methods using unstructured voronoi meshes in petroleum reservoir simulation
This work presents a comparative study among three linearization schemes widely used in petroleum reservoir simulation, namely the Implicit Pressure Explicit Saturation (IMPES), Fully Implicit (FI) and Adaptive Implicit Method (AIM). Attention is given to the criterion used for switching from IMPES to FI and vice-versa. The black-oil model considering the oi
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2009-12
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11. Study of numerical methods for problems of transport phenomenons in unstructured mesh / Estudo de métodos numéricos para solução de problemas de fenômenos de transporte em malhas não estruturadas
This work presents the specification of a computational library currently being developed in order to help find the errors that appear during the development of a numerical model. This library shows chromograms of the variable fields being calculated. It is capable to bring up to date the fields calculated in each iteration, this characteristic is interestin
Publicado em: 2007
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12. Estudo de métodos numéricos para solução de problemas de fenômenos de transporte em malhas não estruturadas / Study of numerical methods for problems of transport phenomenons in unstructured mesh
O presente trabalho apresenta a especificação de uma biblioteca computacional que está sendo desenvolvida com a finalidade de auxiliar na busca de erros que surgem durante o desenvolvimento de um modelo numérico. A referida biblioteca mostra cromogramas das variáveis sendo calculadas. Ela é capaz de atualizar os campos calculados em cada iteração, o
Publicado em: 2007