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| Registros recuperados: 48 | |
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| Silva,Cleide M. D. P. da S. e; Silva,Wilton P. da; Farias,Vera S. de O.; Gomes,Josivanda P.. |
| In this article, a methodology is used for the simultaneous determination of the effective diffusivity and the convective mass transfer coefficient in porous solids, which can be considered as an infinite cylinder during drying. Two models are used for optimization and drying simulation: model 1 (constant volume and diffusivity, with equilibrium boundary condition), and model 2 (constant volume and diffusivity with convective boundary condition). Optimization algorithms based on the inverse method were coupled to the analytical solutions, and these solutions can be adjusted to experimental data of the drying kinetics. An application of optimization methodology was made to describe the drying kinetics of whole bananas, using experimental data available in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Drying kinetics; Algorithm optimization; Diffusion; Porous media. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000200014 |
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| CARVALHO, E. G. de; SOARES, M. R. J.; SANTOS, M. A. U. C. de O.; MARIANTE, A. da S.; CARDOSO, E. E.; SILVEIRA, E. C.; OLIVEIRA, J. P. de; OLIVEIRA, J. N.; SILVA, M. M. F. da; BARBOSA, W. D.. |
| Tecnologia; Difusão. |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Agropecuária; Difusão.; Tecnologia.; Diffusion; Technology.. |
| Ano: 1987 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/317231 |
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| Mycek, Paul; Pinon, Gregory; Germain, Gregory; Rivoalen, Elie. |
| The modelling of diffusive terms in particle methods is a delicate matter and several models have been proposed in the literature. The Diffusion Velocity Method (DVM) consists in rewriting these terms in an advective way, thus defining a so-called diffusion velocity. In addition to the actual velocity, it is used to compute the particles displacement. On the other hand, the well-known and commonly used Particle Strength Exchange method (PSE) uses an approximation of the Laplacian operator in order to model diffusion. This approximation is based on an exchange of particles strength. Although DVM is particularly well suited to particle methods since it preserves their Lagrangian aspect, its major drawback stems in the fact that it suffers from severe... |
| Tipo: Text |
Palavras-chave: Particle method; Diffusion; DVM; PSE. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00159/27006/25254.pdf |
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| Tual, Nicolas; Carrere, N.; Davies, Peter; Bonnemains, T.; Lolive, E.. |
| In recent years, many tidal turbine projects have been developed using composites blades. Tidal turbine blades are subject to ocean forces and sea water aggressions, and the reliability of these components is crucial to the profitability of ocean energy recovery systems. The majority of tidal turbine developers have preferred carbon/epoxy blades, so there is a need to understand how prolonged immersion in the ocean affects these composites. In this study the long term behaviour of different carbon/epoxy composites has been studied using accelerated ageing tests. A significant reduction of composite strengths has been observed after saturation of water in the material. For longer immersions only small further changes in these properties occur. No... |
| Tipo: Text |
Palavras-chave: Carbon; Seawater ageing; Diffusion; Mechanical testing. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00278/38964/37504.pdf |
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| Guerin, Thomas; Bertin, Xavier; Dodet, Guillaume. |
| Over the last decade, modelling systems based on unstructured grids have been appearing increasingly attractive to investigate the dynamics of coastal zones. However, the resolution of the sediment continuity equation to simulate bed evolution is a complex problem which often leads to the development of numerical oscillations. To overcome this problem, addition of artificial diffusion or bathymetric filters are commonly employed methods, although these techniques can potentially over-smooth the bathymetry. This study aims to present a numerical scheme based on the Weighted Essentially Non-Oscillatory (WENO) formalism to solve the bed continuity equation on unstructured grids in a finite volume formulation. The new solution is compared against a classical... |
| Tipo: Text |
Palavras-chave: Morphodynamic modelling; Unstructured grid; WENO; Diffusion; Coastal environments; Exner equation. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00606/71851/70480.gif |
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| Registros recuperados: 48 | |
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