Gravity Currents
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Density currents at steady regime
This work brings as its main contribution the study of the phenomenon of density currents in non-stratified reservoirs, with flows in steady regimes. Flows are analyzed for a wide range of Reynolds and Richardson numbers in the entrance of the reservoir. Based on this hypothesis, a hybrid numeric model is presented considering the Reynolds Transport's Equati
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-09
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2. NUMERICAL AND COMPUTATIONAL SIMULATION OF LOW DENSITY TURBIDITY CURRENTS FOR BASIN SEDIMENTATION / SIMULACAO NUMERICA E COMPUTACIONAL DE CORRENTES DETURBIDEZ DE BAIXA DENSIDADE PARA SEDIMENTACAO DE BACIAS
Turbidity currents occur in both natural and man-made situations. In agreement with some researchers, most of the world¿s oil reserves are stored in hydrocarbon reservoir built by turbidity systems. Because of the importance of these currents, this work proposes a consistent and efficient numerical method for simulations of turbidity currents for basin sedi
Publicado em: 2010
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3. VERIFICAÇÃO DE UM MODELO MATEMÁTICO SIMPLIFICADO PARA CORRENTES DE TURBIDEZ / VALIDATION OF SIMPLIFIED MATHEMATICAL MODEL FOR TURBIDITY CURRENTS
A combinação de modelos numéricos com modelos computacionais tem contribuido muito para o melhor entendimento matemático de fluxos gravitacionais, porém esses modelos não podem substituir a análise através de trabalhos experimentais. O uso de modelos físicos em escala provou ser essencial na validação de equações para modelagem de correntes de t
Publicado em: 2008
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4. MODELAGEM E SIMULAÇÃO DA DINÂMICA DE BÓIAS DE SUPERFÍCIE ANCORADAS / MODELING AND SIMULATION OF THE DYNAMIC OF SURFACE MOORED BUOYS
In this work a method for two-dimensional dynamic analysis of a cylindrical buoy under surfaced waves and moored to the seafloor by a flexible riser is presented. The finite element model used to describe the dynamics of the maritime line was developed by Lustosa (2002). This is a two node beam element based on the Euler-Bernoulli theory, with the element ki
Publicado em: 2008
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5. High-resolution simulations of gravity currents
An overview is given of high-resolution numerical simulation results for gravity currents in the lock exchange configuration. Results are provided for Boussinesq and non-Boussinesq flows, and for both horizontal and sloping bottom geometries. Furthermore, currents driven by fluid density differences are discussed along with those driven by differential parti
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2006-06
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6. Two types of voltage-dependent calcium current in rat somatotrophs are reduced by somatostatin.
1. Somatotrophs were obtained from rat pituitary glands after dissociation, separation and enrichment on a continuous gradient of bovine serum albumin at unit gravity. Somatotrophs were enriched up to 85% in the heavy fractions (F8 and F9). 2. After identification by reverse hemolytic plaque assay, patch-clamp recording in the whole-cell mode was performed o
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7. Physiological characterization of two functional states in subpopulations of prolactin cells from lactating rats.
1. Lactotroph cells from lactating female rat pituitary glands were dissociated, separated and enriched on a continuous gradient of bovine serum albumin at unit gravity. Two lactotroph subpopulations were observed in the light (F(3-5)) and the heavy (F(7-9)) fractions of the gradient. Both populations were maintained for at least 6 days in culture before exp