Computational Processes
Mostrando 13-24 de 274 artigos, teses e dissertações.
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13. Efectos de la aplicación de tratamientos isotérmicos sobre el tamaño de grano y la dureza de aleaciones de aluminio AA5083-H116
ABSTRACT In this work is studied the relationship between morphological characteristics of grain and hardness of aluminum alloys AA5083-H116, which has been submitted to several isothermal treatments. For analysis development were used optical and scanning electron microscopy, chemical microanalysis, hardness measurements, differential scanning calorimetry (
Matéria (Rio J.). Publicado em: 02/05/2017
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14. Phase-Field Simulation of Microsegregation and Dendritic Growth During Solidification of Hypoeutectic Al-Cu alloys
Prediction of microstructure evolution and microsegregation is one of the most important problems in materials science. The dendritic growth and microsegregation provide a challenging simulation goal for computational models of solidification, in addition to being an important technological feature of many casting processes. The phase-field model offers the
Mat. Res.. Publicado em: 26/01/2017
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15. Predicting Secondary-Dendrite Arm Spacing of the Al-4.5wt%Cu Alloy During Unidirectional Solidification
Mechanical properties and performance of metallic materials depend on their microstructures. In order to develop engineering materials that match prescribed criteria and to enable design with multifunctional materials, it is essential to be able to predict their microstructural patterns, such as size, shape, and spacing of the dendritic structures observed i
Mat. Res.. Publicado em: 24/11/2016
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16. New Design Procedure to Determine the Taper Transition for Impedance Matching Between Microstrip Line and SIW Component
Abstract Normally the physical dimensions of the taper transition that realizes the impedance matching between the impedance of the feeding line built in microstrip line technology and the impedance of the component built in Substrate Integrated Waveguide (SIW) technology are obtained by computational optimization processes due the difficulty of analytical t
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2016-09
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17. 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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18. Pores distribution statistical analysis for metal foams obtained by casting-dissolution process
ABSTRACT Interesting properties of metal foams such as light weight, good energy absorption and low thermal conductivity, have promoted the development of new processes to improve properties without sacrificing productivity. This study aims to verify the uniformity pore distribution in an aluminum alloy foam obtained by Casting - Dissolution Process, using a
Matéria (Rio J.). Publicado em: 2016-06
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19. COMPARISON OF MIP MODELS FOR THE INTEGRATED LOT-SIZING AND ONE-DIMENSIONAL CUTTING STOCK PROBLEM
ABSTRACT Production processes comprising both the lot-sizing problem and the cutting stock problem are frequent in various industrial sectors. However these problems are usually treated separately, which can generates suboptimal overall solution and consequently causes production losses. In this paper, we propose different mathematical models for the integra
Pesqui. Oper.. Publicado em: 2016-04
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20. HIGHLY-ACCURATE MODEL ORDER REDUCTION TECHNIQUE ON A DISCRETE DOMAIN
Abstract In this work, we present a highly-accurate technique of model order reduction applied to staged processes. The proposed method reduces the dimension of the original system based on null values of moment-weighted sums of heat and mass balance residuals on real stages. To compute these sums of weighted residuals, a discrete form of Gauss-Lobatto quadr
Braz. J. Chem. Eng.. Publicado em: 2015-09
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21. Simulation of the Microstructural Evolution of Pure Material and Alloys in an Undercooled Melts via Phase-field Method and Adaptive Computational Domain
The phase-field methods were developed mainly for studying solidification of pure materials, being then extended to the solidification of alloys. In spite of phase-field models being suitable for simulating solidification processes, they suffer from low computational efficiency. In this study, we present a numerical technique for the improvement of computati
Mat. Res.. Publicado em: 2015-06
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22. A novel ABCG-like transporter of Trypanosoma cruzi is involved in natural resistance to benznidazole
Benznidazole (BZ) is one of the two drugs used for Chagas disease treatment. Nevertheless therapeutic failures of BZ have been reported, which were mostly attributed to variable drug susceptibility among Trypanosoma cruzi strains. ATP-binding cassette (ABC) transporters are involved in a variety of translocation processes and some members have been implicate
Mem. Inst. Oswaldo Cruz. Publicado em: 28/04/2015
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23. Effect of the Fiber Orientation Relatively to the Plasma Flow Direction in the Ablation Process of a Carbon-Phenolic Composite
ABSTRACT: Composite materials are vastly employed in rocket nozzle extensions and as thermal protection shields in aerospace industry. In both cases, ablative and thermal properties play an important role for material choice and equipment sizing. These properties are strongly dependent on the way the pieces are manufactured. For the case of nozzle extensions
J. Aerosp. Technol. Manag.. Publicado em: 2015-03
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24. Metabolomics in the fight against malaria
Metabolomics uses high-resolution mass spectrometry to provide a chemical fingerprint of thousands of metabolites present in cells, tissues or body fluids. Such metabolic phenotyping has been successfully used to study various biologic processes and disease states. High-resolution metabolomics can shed new light on the intricacies of host-parasite interactio
Mem. Inst. Oswaldo Cruz. Publicado em: 2014-08