Joule Heating
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. Controller for a SPS machine: a proposal PI control
ABSTRACT Temperature control is the key to effective sintering process for metal, ceramic and polymer powders. The original control temperature provides an irregular control operation process which affects the material properties due to the spacer involved in it. Furthermore, it is analyzed how the material responds to an electrical input determining a model
Matéria (Rio J.). Publicado em: 19/07/2018
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2. Influence of thermophoresis and joule heating on the radiative flow of jeffrey fluid with mixed convection
The aim of the present study is to address the magnetohydrodynamic (MHD) radiative flow of an incompressible Jeffrey fluid over a linearly stretched surface. Heat and mass transfer characteristics are accounted for in the presence of Joule heating and thermophoretic effects. Series solutions by the homotopy analysis method are constructed for the velocity, t
Braz. J. Chem. Eng.. Publicado em: 2013-12
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3. On a linearisation method for Reiner-Rivlin swirling flow
The steady flow of a Reiner-Rivlin fluid with Joule heating and viscous dissipationis studied. We present a novel technique for accelerating the convergence of the spectral-homotopy analysis method. Solutions of the nonlinear momentum and energy equations are obtained using the improved spectral homotopy analysis method. Solutions were also generated using t
Computational & Applied Mathematics. Publicado em: 2012
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4. Development of granular structure in Cu/sub 90/Co/sub 10/ ribbons through furnace and current annealing
On-line measurements of resistance and temperature in melt-spun Cu90Co10 ribbons are made using two different annealing techniques: conventional furnace annealing, and linearly varying current Joule heating. The aim of this paper is to consider the electrical current, flowing through the sample during the annealing, as a possible parameter to control thermal
Publicado em: 2011
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5. Metodologia para uso de simulação física no estudo da ZAC e na obtenção de diagramas CCT para soldagem / The Use of Physical Simulation on HAZ Study and CCT Diagram Attainment Dedicated to Welding
The joining of metals is often associated to metallurgical problems. Specifically, metallurgical transformations in the HAZ (Heat Affected Zone) can occur, what lead to undesirable microestructural changes. The HAZ is a difficult region for studying due to its small dimensions and high thermal gradientes. Thus, in order to overcome this limitation of the HAZ
Publicado em: 2008
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6. MAGNETOIMPEDÂNCIA COMO FERRAMENTA PARA A CARACTERIZAÇÃO MAGNÉTICA DE MICROFIOS AMORFOS / MAGNETOIMPEDANCE AS A TOOL TO INVESTIGATE THE MAGNETIC PROPERTIES OF MICROWIRES
The possibility of exploring the magnetic properties of amorphous microwires in technological applications has attracted the attention of the scientific community in the last years. Beyond, the magnetoimpedance effect has been established as a powerful tool to study these properties. In this work we show a study of the magnetic properties of Joule heated gla
Publicado em: 2006
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7. Localização de corrente e efeito Joule em manganitas com ordenamento de carga / Current localization and Joule self-heating effects in manganites with charge ordered
Este trabalho contempla um estudo sistemático das propriedades elétricas de óxidos cerâmicos a base de manganês. Ênfase foi dada a sistemas onde uma correlação forte entre os graus de liberdade de carga, spin e rede com ordenamento orbital resultam em um estado fundamental heterogêneo, devido a uma separação de fases. Com esse objetivo, foram prep
Publicado em: 2005
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8. The role of the rheological properties of non-newtonian fluids in controlling dispersive mixing in a batch electrophoretic cell with Joule heating
The problem of the effect of Joule heating generation on the hydrodynamic profile and the solute transport found in electrophoretic devices is addressed in this article. The research is focused on the following two problems: The first one is centered around the effect of Joule heating on the hydrodynamic velocity profile and it is referred to as "the carrier
Brazilian Journal of Chemical Engineering. Publicado em: 2001-03
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9. Non-newtonian carriers in a batch electrophoretic cell with joule heating: hydrodynamic considerations and mathematical aspects
The Joule heating effects on hydrodynamics are examined for the case of a non-Newtonian fluid flowing in a batch electrophoretic cell. The potential benefits of using non-Newtonian fluids in electrophoretic separations could lead, for example, to an increase in the efficiency of separations and to a better scale-up of the operation for the processing of larg
Brazilian Journal of Chemical Engineering. Publicado em: 2001-03
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10. Crystallization kinetics of Fe-B based amorphous alloys studied in-situ using X-rays diffraction and differential scanning calorimetry
The crystallization processes for the amorphous metallic alloys Fe74B17Si2Ni4Mo3 and Fe86B6Zr7Cu1 (at. %) were investigated using X-rays diffraction measurements performed in-situ during Joule-heating, with simultaneous monitoring of the electrical resistance. We determined the main structural transitions and crystalline phases formed during heating, and cor
Materials Research. Publicado em: 2001-01
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11. Formação de nanoestruturas magneticas por aquecimento Joule
In this thesis, we discuss the processes of formation and control of magnetic nanostructures in binary alloys of composition Cu90 Co10 and Cu85 Co15, and in the amorphous alloy of composition Fe86 Zr7 Cu1 B6 through thermal annealing using the Joule heating technique. We present two diferent ways to control the Joule heating: by directly applying the anneali
Publicado em: 2000
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12. Dimensionamento, construção e teste de magneto supercondutor para gerar 12 T (Nb3Sn + NbTi)
Superconducting magnets based on metallic superconducting wires (NbTi and Nb3Sn) are used to generate high magnetic fields in a compact winding without Joule heating by applying current density above 1.5x 108 A/m2 at liquid helium temperature (4.2 K). In order to sustain high currents without heat dissipation structural and electrical materiaIs must withstan
Publicado em: 2000