Computational Fluid Dynamics Cfd
Mostrando 13-24 de 124 artigos, teses e dissertações.
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13. SIMULATION OF VENTILATION SYSTEMS IN A PROTECTED ENVIRONMENT USING COMPUTATIONAL FLUID DYNAMICS
ABSTRACT Computational simulations of mass and energy flow help in implementing alternative cooling systems in protected environments. The aim of this study was to model and simulate the interaction between external and internal environments of a protected environment by means of computational fluid dynamics (CFD) techniques and validate micrometeorological
Eng. Agríc.. Publicado em: 2017-06
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14. CFD Simulation of an Industrial Reactor for Thermal Cracking of 1,2-Dichloroethane
Abstract The vinyl chloride monomer (VCM) is commercially produced on a large scale by thermal cracking of 1,2-dichloroethane (EDC) in a tubular reactor immersed in a furnace. Computational fluid dynamics (CFD) was used to simulate and predict the performance of an industrial reactor. The reactor conversion as well as the behavior of several process variable
Braz. J. Chem. Eng.. Publicado em: 2017-04
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15. Análise da ventilação natural conforme planos diretores: resultados de pesquisa em Belém, PA
Resumo O desenho urbano e o planejamento físico das cidades podem ser elementos determinantes no comportamento ambiental dos espaços construídos. Dentre as variáveis climáticas afetadas pelas normas urbanísticas, o vento merece destaque. Este tem a sua velocidade de escoamento alterada pelas formas de ocupação e pelo adensamento urbano. Dentre as fer
Ambient. constr.. Publicado em: 2017-03
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16. COMPUTATIONAL FLUID DYNAMICS (CFD) APPLICATION FOR VENTILATION STUDIES IN BROILER HOUSES
ABSTRACT With the recent increase in the number of acclimatized broiler houses in Brazil, design and adaptation of facilities to withstand the tropical weather conditions enabling the maintenance of ideal conditions without increasing costs have been major challenges. The aim of this study was to evaluate the ventilation system in solid-wall broiler houses u
Eng. Agríc.. Publicado em: 2017-02
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17. Computational Fluid Dynamics (CFD) simulating heated air from wood burning inside a poultries barn
ABSTRACT Animal welfare is essential for livestock yield gains, which has been ethically justifiable and socially acceptable. Thus, our research aimed to test computational fluid dynamics model (CFD) to simulate heated air within a poultry barn. Data were simulated in CFD software based on Navier-Stokes equations (geometry of 3 m x 6 m, considering a symmetr
Eng. Agríc.. Publicado em: 2016-10
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18. A CFD STUDY OF DEPOSITION OF PHARMACEUTICAL AEROSOLS UNDER DIFFERENT RESPIRATORY CONDITIONS
Abstract Respiratory diseases have received increasing attention in recent decades. Airway bifurcations are difficult regions to study, and computational fluid dynamics (CFD) offers an alternative way of evaluating the behavior of pharmaceutical aerosols used in the treatment of respiratory disorders. In this work, particle deposition was analyzed using a th
Braz. J. Chem. Eng.. Publicado em: 2016-09
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19. THE IMPACT OF RADIATION IN THE GAS COMBUSTION MODEL FOR SUGARCANE BAGASSE GRATE BOILER
Abstract This work evaluates the impact of different radiation models on the results of Computational Fluid Dynamics (CFD) simulation of a sugarcane bagasse grate boiler. CFD has been applied extensively in the development of comprehensive models for biomass heterogeneous combustion. The model presented in this paper considers the turbulent flow represented
Braz. J. Chem. Eng.. Publicado em: 2016-09
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20. LINEAR STABILITY ANALYSIS AND CFD SIMULATION OF DOUBLE-LAYER RAYLEIGH-BÉNARD CONVECTION
Abstract Natural convection in superimposed layers of fluids heated from below is commonly observed in many industrial and natural situations, such as crystal growth, co-extrusion processes and atmospheric flow. The stability analysis of this system reveals a complex dynamic behavior, including the potential multiplicity of stationary states and occurrence o
Braz. J. Chem. Eng.. Publicado em: 2016-09
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21. STUDY OF FEEDSTOCK INJECTION TO IMPROVE CATALYST HOMOGENIZATION IN THE RISER OF A FCC
Abstract A three dimensional gas-solid reactive flow model based on the Eulerian-Eulerian approach was used to study the effects of different nozzle designs with internal parts inside the FCC riser. The simulations were solved using Computational Fluid Dynamics (CFD) with CFX version 14.0 as tool. The results showed that the nozzle designs have a significant
Braz. J. Chem. Eng.. Publicado em: 2016-09
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22. Investigation on the nasal airflow characteristics of anterior nasal cavity stenosis
We used a computational fluid dynamics (CFD) model to study the inspiratory airflow profiles of patients with anterior nasal cavity stenosis who underwent curative surgery, by comparing pre- and postoperative airflow characteristics. Twenty patients with severe anterior nasal cavity stenosis, including one case of bilateral stenosis, underwent computed tomog
Braz J Med Biol Res. Publicado em: 01/08/2016
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23. CFD 2D Description of Local Flow of Polymer Workpiece through a modified U-Shaped Die During Equal Channel Multiple Angular Extrusion
The present article is focused on a 2D computational fluid mechanics study of local viscous flow dynamics and the formation character of rotary modes of deformation during Equal Channel Multiple Angular Extrusion (ECMAE) of a polymer workpiece fluid model through a U-shaped die with parallel slants in channel intersection zones. The present local flow proble
Mat. Res.. Publicado em: 08/04/2016
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24. CFD modeling of two immiscible fluids mixing in a commercial scale static mixer
A Computational Fluid Dynamics model based on the Eulerian formulation for multiphase flow was developed to model the mixing hydrodynamics of two immiscible fluids in a commercial scale static mixer. The two immiscible liquids were condensate and caustic solutions and were considered as two phases that are interpenetrating each other. The aim of this study w
Braz. J. Chem. Eng.. Publicado em: 2014-12