Mass And Heat Transfers
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Proposta e comparação de um modelo fenomenológico com base em alto transporte de massa e supersaturação para torre de resfriamento de água. / Presentation and comparison of a model based in high mass transfer and supersaturation in a cooling water tower.
Cooling towers are equipment widely used in industrial plants, where these operate under severe conditions such as cooling water inlet temperatures above 50oC. Under this condition, there are high evaporation of water and high mass transfer, generally not considered in performance analysis of a cooling tower. This work presents and analyzes the differences b
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/12/2011
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2. Eulerian-lagrangian simulation of a turbulent evaporating spray
This work consists in a numerical simulation of a spray jet: a two-phase flow composed by a gaseous and a liquid phase. The gaseous phase is treated as a continuous medium, and the liquid phase is treated as a dispersed phase. An asymptotic approximation of zero Mach number was applied to the gaseous phase in order to account for density variations due to te
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/11/2011
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3. Development of A Darcy-flow model applied to simulate the drying of shrinking media
A mathematical model is developed to describe the coupling between heat, mass, and momentum transfers and is applied to simulate the drying of saturated and shrinking media. This model is called "the Darcy-flow model", which is based on the fact that the liquid flow is induced by a pressure gradient. The main novelties of the model are that firstly no phenom
Brazilian Journal of Chemical Engineering. Publicado em: 2008-09
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4. Fluidized bed spray granulation: analysis of heat and mass transfers and dynamic particle populations
A model was developed taking into consideration the heat and mass transfer processes in liquid-sprayed fluidized beds. Such fluidized beds (FB) are used for granulation, coating and agglomeration. Conclusions are drawn on the relevance of particle dispersion, spraying and drying to temperature and concentrations distributions. In extension, the model was cou
Brazilian Journal of Chemical Engineering. Publicado em: 2005-06
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5. Transient convective heat transfer
In nature, as well as within the human-made thermal systems, the time-variable regimes are more commonly encountered, if not always, than the permanent regimes. Nevertheless, studies in convection are still more frequent in the permanent regimes, undoubtedly due to the related difficulties in calculation in terms of time and cost of computation. One may dist
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2005-03
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6. Avaliação experimental dos coeficientes de transferencia de massa e calor em uma coluna com pratos perfurados
Due to the relation with the mass, heat and momentum transfer phenomena, capacity and operational characteristics, thermodynamic properties and the wide relationship with other industrial equipment, the study of the separation processes by distillation becomes very complex, in spite of its extensive use in the chemical and petrochemical industries. For this
Publicado em: 2000