Convection Schemes
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. 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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2. Sensibilidade da precipitação simulada na região do Centro de Lançamento de Alcântara a esquemas de convecção explícita: estudos de caso / Sensitivity of the simulated precipitation over the Alcântara Launch Center region to explicit convection schemes: case studies
Eventos de precipitação ocorridos na região do Centro de Lançamento de Alcântara (CLA) foram simulados com o modelo regional MM5 em grades aninhadas para avaliar a sensibilidade da precipitação simulada a 1) uso de diferentes esquemas de convecção explícita e 2) retirada do esquema de convecção implícita nas grades de maior resolução horizonta
Publicado em: 2010
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3. Análise e implementação de esquemas de convecção e modelos de turbulência para simulação de escoamentos incompressíveis envolvendo superfícies livres. / Analysis and implementation of convection schemes and turbulence models for simulation of incompressible flows involving free surfaces.
A considerable part of fluid flows encountered in technological applications is characterised by involving high-Reynolds numbers, especially those in turbulent regime and with free-surface. It is extremely difficult to obtain representative numerical solutions for this class of problems, due to the non-linear nature of the partial differential equations invo
Publicado em: 2001
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4. Numerical study on mixed convection in a horizontal flow past a square porous cavity using UNIFAES scheme
Mixed convection on the flow past a heated length and past a porous cavity located in a horizontal wall bounding a saturated porous medium is numerically simulated. The cavity is heated from below. The steady-state regime is studied for several intensities of the buoyancy effects due to temperature variations. The influences of Péclet and Rayleigh numbers o
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2000
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5. Impacto de parametrizacoes de conveccao em ciclogenese sobre o oceano / The impact of convection parametrization on oceanic cyclogenesis
Numerical simulations of a South Atlantic cyclogenese event were performed in order to examine the role of three cumulus parameterizations (Kuo; Kain and Fritsch; Fritsch and Chappelly The atmospheric model employed is the Japan Meteorological Agency limited area model, adapted to the South America region. The effect of the cumulus parameterization depending
Publicado em: 1999
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6. Performance of the CPTEC/COLA global model during SACZ episodes using kuo and relaxed arakawa-schubert deep convection schemes / Desempenho do modelo global CPTEC/COLA durante episódios de ZCAS, utilizando os esquemas de convecção profunda tipo kuo e arakawa-schubert relaxada
One of the most important meteorological phenomena during summer in South America is the South Atlantic Convergence Zone (SACZ). Several studies have been accomplished in order to understand the atmospheric dynamics involved in its formation. In this work, the performance of the Center for Weather Forecast and Climate Studies (CPTEC) global model is evaluate
Publicado em: 1999
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7. Desempenho do modelo global CPTEC/COLA durante episódios de ZCAS, utilizando os esquemas de convecção profunda tipo kuo e arakawa-schubert relaxada / Performance of the CPTEC/COLA global model during SACZ episodes using kuo and relaxed arakawa-schubert deep convection schemes
Um dos fenômenos meteorológicos de verão mais importantes da América do Sul é a Zona de Convergência do Atlântico Sul (ZCAS). Diversos estudos têm sido feitos a fim de compreender a dinâmica atmosférica envolvida na sua formação. Neste trabalho, avalia-se a performance do modelo global do Centro de Previsão e Estudos Climáticos (CPTEC) durante
Publicado em: 1999
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8. Esquemas de alta resolução para controle da dispersão numerica em simulação de reservatorios
Standard finite-diference reservoir simulation normally uses single-point upstream welghting to approximate the components of the convective flow term at the interfaces between blocks. This procedure stabilizes the numerical solution, but introduces high levels of numerical dispersion, difficulting the correct interpretation of the simulated results. Exponen
Publicado em: 1991