Convection Scheme
Mostrando 1-12 de 23 artigos, teses e dissertações.
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1. Analysis of the physical quality of genetically modified and conventional maize grains in the drying and wetting processes
RESUMO O objetivo deste trabalho foi avaliar a qualidade física dos grãos de milho geneticamente modificados (Herculex 30S31) em função dos processos de secagem e umedecimento em relação ao milho convencional (AG 1051). O delineamento experimental foi o inteiramente casualizado, com esquema fatorial (7x3x2), sete tempos de secagem ou umedecimento (0, 2
Rev. Ciênc. Agron.. Publicado em: 04/07/2019
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2. NUMERICAL SIMULATION OF THE INCOMPRESSIBLE TURBULENT FLOW OF A BINARY MIXTURE OF AIR-WATER VAPOR: APPLICATIONS IN DRYING PROCESS
Abstract The present work deals with numerical simulation of the incompressible turbulent flow of a binary mixture air-water vapor inside channels. Calculations are performed using the RANS (Reynolds Average Navier-Stokes Equations) formulation in addition to the standart k-ε turbulence model. The mathematical model is discretized by a finite difference sch
Braz. J. Chem. Eng.. Publicado em: 2016-06
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3. A weighted mass explicit scheme for convection-diffusion equations
An explicit scheme based on a weighted mass matrix, for solving time-dependent convection-diffusion problems was recently proposed by the author and collaborators. Convenient bounds for the time step, in terms of both the method's weights and the mesh step size, ensure its stability in space and time, for piecewise linear finite element discretisations in an
Comput. Appl. Math.. Publicado em: 2012
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4. 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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5. 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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6. Turbulent natural convection in enclosures using large-eddy simulation with localized heating from horizontal bottom surface and cooling from vertical surfaces
Turbulent natural convection of air that happens into inner square cavity with localized heating from horizontal bottom surface has been numerically investigated. Localized heating is simulated by a centrally located heat source on the bottom wall, and two values of the dimensionless heat source length ? are considered in the present work. Solutions are obta
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2009-09
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7. Experimentos com o modelo regional eta em diferentes configurações durante o período salljex e mecanismos de mesoescala associados ao desenvolvimento de scm / Experiments with the regional eta model in different settings during the salljex period and mesoescale mechanisms associated with MCS development
The rainfall regime over southern Brazil, Uruguay and northern Argentina is strongly influenced by Mesoscale Convective Complexes (MCCs) that develop during night time associated with the Low Level Jet (LLJ) to the east of Andes. As they are mesoscale systems, their predictability depends on the model resolution and ability in representing the main features
Publicado em: 2008
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8. Experimentos com o modelo regional eta em diferentes configurações durante o período salljex e mecanismos de mesoescala associados ao desenvolvimento de scm / Experiments with the regional eta model in different settings during the salljex period and mesoescale mechanisms associated with MCS development
Diversos mecanismos estão envolvidos no desenvolvimento de complexos convectivos de mesoescala (CCMs) no norte da Argentina, alguns bastante estudados (escala sinótica) e outros ainda a serem discutidos (escalas locais, tais como circulações vale-montanha). Uma das ferramentas que vem sendo amplamente utilizada para estudar os CCMs, principalmente em reg
Publicado em: 2008
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9. Inclusion of the momentum perturbation in the kain-fritsch cumulus parameterization scheme and impacts on a convective rain case / Inclusão da perturbação de momentum no esquema de parametrização de cumulus kain-fritsch e impactos sobre um caso de chuva convectiva
The objective of this work is to insert the vertical transport of momentum through the mass flux in the Kain-Fritsch convective parameterization scheme. The momentum fluxes were inserted in the KF scheme in a similar way to the existing heat fluxes. Experiments were accomplished in the two domains, one experiment with cloud updraft (FM1) and one experiment i
Publicado em: 2007
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10. Análise de um método para equação de convecção formulado à luz da mecânica dos meios contínuos a advecção de anomalias oceânicas e meteorológicas / Analysis of a method for the convection equation formulated in the light of mechanical means of the continuous advection of oceanic and meteorological anomalies
In the present work we studied and analyzed the Trajectories Tube method, a conservative, explicit, simple, physically intuitive, semi-Lagrangian algorithm for the convection equation. Kinematical aspects of the mechanics of continuous media are essentially the tools used for formulation and feasibility analysis. We showed that this method is unconditionally
Publicado em: 2006
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11. Modelagem matematica e simulação numerica do refriamento rapido com ar forçado de morango
The temperature is one of the main factors that affects the fruits life after harvest. Increasing the temperature, speeds up the metabolism of the fruits, taking them to faster deterioration. One of the best ways to prevent the fruits of this kind of damage, is to apply the pre-cooling immediately after harvest, and to control the temperature during its st
Publicado em: 2004
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12. Vortex method with turbulence sub-grid scale modelling
In this paper a method for the simulation of convection and diffusion of the vorticity, generated on a body surface is presented. A purely Lagrangian scheme is used for the vorticity convection, and thereby avoiding mesh associated problems. The body surface is simulated by straight-line panels, with constant-strength vortex distribution. The strength of the
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2003-04