Thermal Fronts
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Movimiento de las interfases durante la solidificación horizontal de aleaciones estaño-zinc
ABSTRACT Solidification processing is one of the important routes to produce materials, especially metals and alloys. The parameters for the transformation from liquid to solid, such as the temperature gradient, the growth rate, the cooling rate, the interphase velocity, vary from process to process and in one process also as a function of time and space. Th
Matéria (Rio J.). Publicado em: 19/07/2018
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2. Simulation of Ablation in a Sounding Rocket Thermal Protection System Via an Interface Tracking Method with Two Moving Fronts
ABSTRACT: In this work, an interface tracking method is employed to simulate the ablative process in the region near the stagnation point of the VSB-30 sounding rocket Thermal Protection System (TPS). The ablation model considers the presence of two-fronts, the char-melting and the pyrolysis fronts. The results for the proposed model are compared to the ones
J. Aerosp. Technol. Manag.. Publicado em: 2013-12
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3. Simulation of Ablation in a Composite Thermal Protection System via an Interface Tracking Method
Abstract: In this work, the two-dimensional computational simulation of the ablative process in a composite used in rocket thermal protection systems via an interface tracking method was presented. The ablative model considers the presence of two simultaneous moving fronts, the pyrolysis and char fronts. The results were compared with some experimental data,
J. Aerosp. Technol. Manag.. Publicado em: 2012-09
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4. Estrutura organizacional do fitoplâncton nos sistemas lóticos e lênticos da bacia do Tietê-Jacaré (UGRHi-Tietê-Jacaré) em relação à qualidade da água e estado trófico
The aim of this work was to study the phytoplankton structure of lentic and lotic systems of Tietê/Jacaré basin located in São Paulo State and the relationship between the composition and dominance of phytoplankton organisms with the water quality and trophic state of the rivers and lakes of this basin. The Tietê/Jacare basin is composed by three main ri
Publicado em: 2009
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5. Estudo de frentes mesosféricas na região equatorial / Study of mesospheric fronts in the equatorial region
An extensive study on mesospheric fronts was carried out by means of mesospheric airglow image observation at at São João do Cariri, PB (7,4oS; 36,5oW) from July 2004 to December 2005. All sky airglow images, meteor radar wind and TIMED/SABER satellite temperature data were used in order to investigate physical scenario of the mesospheric front. Three diff
Publicado em: 2007
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6. Transição sol-gel em soluções orgânico-aquosas de lisozima e o efeito indutor do solvente: caracterização cinética e estrutural / Sol-gel transition in aqueous-organic solutions of lysozyme and the solvent-inducing effect: a kinetic and structural characterization
Lysozyme sol-gel transition in tetramethylurea/water was investigated in depth. These dispersions produced highly viscous systems, which evolved to physical gels, i.e., systems where the gel backbone is maintained by van der Walls forces and hydrogen bonding. The work was conducted in two fronts: a) the study of lysozyme dispersions in binary mixtures; b) th
Publicado em: 2006
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7. EXPERIMENTAL INVESTIGATION AND PERFORMANCE ESTIMATE OF DIESEL ENGINES BURNING NATURAL GAS / AVALIAÇÃO EXPERIMENTAL E PREVISÃO DO DESEMPENHO DE MOTORES DIESEL CONSUMINDO GÁS NATURAL
Four Diesel engines, all running on the Diesel / natural gas dual fuel mode, were dynamometer tested. Engines were selected based on their distinct construction, operating parameters and engine field use. The Diesel / natural gas substitution was varied in order to determine the dual fuel operation limits. Measurements related to particulate emissions (smoke
Publicado em: 2006
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8. VARIACOES EM ESCALA MÉDIA DA TEMPERATURA E DA SALINIDADE DO MAR NA REGIÃO ENTRE A BAÍA DA GUANABARA E CABO FRIO (17/8 A 26/8/1971). / Temperature and salinity variations between Guanabara Bay and Cabo Frio (17/8 a 26/8/1971).
Temperature and salinity variations between Guanabara Bay and Cabo Frio (17/8 a 26/8/1971).
Publicado em: 1974