Multiphase Mathematical Model
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Simulación matemática para la optimización del patrón de flujo entregado por una buza para el molde de colada continua de planchón delgado
ABSTRACT Understanding the behavior of the oscillations of the jets into the mold of thin slab funnel is essential to ensure a constant supply of liquid steel, improve control of the flow patterns and consequently increase plant productivity and the final product quality. To achieve this, we conducted a study of the effect of the internal design of the nozzl
Matéria (Rio J.). Publicado em: 19/07/2018
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2. Mathematical modeling of the shaft furnace process for producing DRI based on the multiphase theory
Abstract A numerical model based on transport equations for momentum, energy and chemical species for the gas and solid phases is proposed to simulate the inner phenomena in the direct reduction of the shaft furnace process for producing directly reduced iron (DRI). The model is verified using industrial data for productivity, raw materials and final composi
REM, Int. Eng. J.. Publicado em: 2018-03
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3. Three dimensional mathematical model of the iron ore sintering process based on multiphase theory
In the integrated steel industries the sintering process plays an important role furnishing raw material to the blast furnace. In this work, a computational simulation of the sinter process is developed that is able to predict the most important phenomena within the sintering bed. The model is based on the multi phase concept with multiple components describ
Mat. Res.. Publicado em: 04/09/2012
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4. Evaluation of mathematical models to describe growth of grazing young bulls
The objective of this study was to evaluate the use of different mathematical models to describe growth of grazing beef cattle. Data of 20 Nellore bulls with initial weight of 129±28.1 kg and final weight of 405±62.0 kg were used. The animals were randomly divided into four plots and placed on B. decumbens Stapf pastures. Three plots received concentrate s
Revista Brasileira de Zootecnia. Publicado em: 2012-02
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5. Investigação do escoamento bifásico gás-líquido em uma coluna de bolhas retangular por meio da técnica CFD / Investigation of two-phase gas-liquid flow in a rectangular bubble column using CFD technique
This study aims to evaluate the main forces which act in gas-liquid flow in a rectangular bubble column of dimensions 150cm x 26;4cm x 3;1cm (height (H) x width (W) x depth (D)), with centralized aeration, using CFD technique. The proposed case is based in a experimental study of an air-water system operating in homogeneous bubbly flow, with initial liquid h
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/12/2011
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6. Modelo matemático multigrãos e multifásico para a previsão da solidificação equiaxial. / Multigrain and multiphase mathematical model for prediction of the equiaxed solidification.
Properties of components obtained by solidification processes depend strongly on the final grain structure. In the past few decades, there has been a significant breakthrough in the mathematical modeling of metallic alloy solidification to predict the grain macrostructure. Nevertheless, the so-called deterministic models are still not capable of modeling the
Publicado em: 2011
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7. Modelamento matemático do refino do aço inoxidável em conversores AOD-L
In the present work was presented a study about the development and the application of a multiphase and multicomponent mathematical model for the decarburisation of stainless steels. The developed model takes into account three possible interfaces of reaction (metal-gas, metal-oxide and oxide-gas) and considers the main components involved in the process (C,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/12/2006
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8. Efeito da nucleação de grãos nas previsões do modelo multifásico para a solidificação equiaxial. / Effects of grain nucleation on the predictions of the multiphase model for equiaxed solidification.
A multiphase mathematical model for the equiaxed solidification of binary alloys was proposed in the present work to predict the effects of the cooling rate and the average solute concentration on the final average grain size. The mathematical model was based on the concept of the grain envelope and on the conservation of energy, mass and chemical species. A
Publicado em: 2006
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9. Controle e otimização de um reator de hidrogenação trifasico
The present work aims to study the control and optimization of a multiphase catalyst slurry reactor, in order to deal with the Real Time Integration of Continuous Process. As the study case is considered a three-phase catalytic hydrogenation reactor, which is represented by a deterministic mathematical model. The dynamic behavior of the production process is
Publicado em: 2003
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10. Modelagem fenomenologica e simulação bidimensional de ciclones por tecnicas da fluidodinamica computacional
This work presents a mathematical modeling based on the principIes of mass and momentum conservation with the volumetric average point of view, and generalized to represent the multiphase flow in cyclones. It also discusses the hypotheses necessary for flutuating properties treatment, due to Reynolds decomposition applied as statistical treatment of the turb
Publicado em: 1998
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11. Estudo da cinetica da homogenização em ligas não ferrosas
For a given solidification structure it is important to be able to predict the effect of any heat treatment on that structure. This is of particular importance in terms of changes in solute distribution and dissolution of non-equilibrium second phase, which have a major influence on the mechanical properties. In this study, a mathematical model is outlined,
Publicado em: 1978