Laminar Turbulent Transition
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Determining the viscous behavior of non-Newtonian fluids in a flume using a laminar sheet flow model and Ultrasonic Velocity Profiling (UVP) system
The flow of non-Newtonian fluids in rectangular open channels has received renewed interest over the past number of years especially as large flumes are being used to transport tailings in countries like Chile. The effect of yield stress on the flow behavior is complex and not yet fully understood. The Ultrasonic Velocity Profiling (UVP) technique has been u
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012-09
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2. Heat and mass transfer in two-phase flow around airfoils with aeronautical anti-ice systems. / Transferência de calor e massa no escoamento bifásico em torno de aerofólios equipados com sistemas de antigelo aeronáuticos.
It is required to prevent ice accretion on wings and horizontal stabilizers because it may cause aerodynamic performance degradation, weight increase, flight control difficulties and, in critical cases, may lead to operational safety margins reduction. When aircraft flies through clouds containnig supercooled water droplets, which are in metastable equilibri
Publicado em: 2009
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3. Numerical Simulation of Accidental Explosions in Offshore Production Plant
The production of oil and gas is an inherently hazardous task. Therefore it is crucial to provide reliable estimates of the risks involved. The major contributors to the risk level of an offshore installation, for example, arise from accidents involving explosion and fire. Computational Fluid Dynamics (CFD) can be a powerful tool to help with the calculation
Publicado em: 2009
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4. Visualization study and quantitative velocity measurements in turbulent taylor-couette flow by phantomm flow tagging: a description of the transition to turbulence
A visualization study and Quantitative velocity measurements have been performed in Taylor-Couette flow with a medium-gap (ç= 0.356), over a large range of Taylor numbers (2.1x10(4) < Ta < 1.1x10(11)), with the outer cylinder fixed and the inner cylinder rotating about its axis. Quantitative velocity measurements were carried out using the PHANTOMM flow tag
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2003-12
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5. Modelagem e simulação da operação de sistema antigelo eletrotérmico de um aerofólio. / Modeling and simlulation of an electro-thermal airfoil anti-ice system operation.
An electro-thermal anti-ice system was simulated with a mathematical model developed in the present work. A 44.7 m/s (100 mph) and 89.4 m/s (200 mph) full potential flow around a 0.914 m (3 ft) chord NACA0012 airfoil with 0° angle of attack and the local water catch efficiency of 20 μm median volumetric diameter droplets impingement were calculated by
Publicado em: 2002
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6. SOLIDIFICATION AND FUSION OF PURE SUBSTANCES UNDER THE INFLUENCE OF LAMINAR AND TURBULENT NATURAL CONVECTION / SOLIDIFICAÇÃO E FUSÃO DE SUBSTÂNCIAS PURAS SOB A INFLUÊNCIA DA CONVECÇÃO NATURAL LAMINAR E TURBULENTA / SOLIDIFICACIÓN Y FUSIÓN DE SUSTANCIAS PURAS SOBRE LA INFLUENCIA DE CONVECCIÓN NATURAL LAMINAR Y TURBULENTA
Solidification and fusion belong to a class of transient heat transfer problems known as phase change problems or moving boundary problems. The solution of this class of problems presents an additional difficulty concerning the movement of the interface. This movement is due to the absorption or removal of the latent heat at the interface. As a consequence t
Publicado em: 2000
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7. Escoamento em tubos de suspenções com comportamento não-newtoniano
The objective of this research has been to obtain a more general expression to predict the transition velocity from laminar to turbulent flow in more efficient and economical slurry pipeline designs ...Note: The complete abstract is available with the full electronic digital thesis or dissertations
Publicado em: 1985