Results 251 to 260 of about 3,031,429 (300)
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Journal of Applied Physics, 1949
For a definite Mach number, given by M2 = 4/(3−γ), all Mach lines in a steady plane two-dimensional potential flow of a perfect gas with expansion exponent γ have zero curvature. The use and significance of this relation are discussed, and the hypothetical expansion law consistent with straight Mach lines is deduced.
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For a definite Mach number, given by M2 = 4/(3−γ), all Mach lines in a steady plane two-dimensional potential flow of a perfect gas with expansion exponent γ have zero curvature. The use and significance of this relation are discussed, and the hypothetical expansion law consistent with straight Mach lines is deduced.
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Flow Patterns, Transitions and Models for Specific Flow Patterns
2003This chapter presents flow patterns, the configurations into which gas/liquid flows can arrange themselves in pipes and other geometries. Simple, mainly empirical, graphical methods for predicting the flow patterns occurring are then presented. The effect of flow patterns on heat transfer and of heat transfer on flow patterns are then considered ...
Barry Azzopardi, John Hills
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Patterning Flows Using Grooved Surfaces
Analytical Chemistry, 2002Through a simple analytical description we quantify how pressure-driven flows over grooved surfaces develop transverse components, which, for shallow grooves, can be modeled with simple anisotropic effective boundary conditions. Helical recirculation results in channels or capillaries with grooved walls.
Abraham D, Stroock +3 more
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Pattern formation in flowing sand
Physical Review Letters, 1989Using digital subtraction radiography, we study the basic modes of a granular material (here sand) flowing through a flat hopper. These modes take the form of density waves whose formation and propagation is controlled by several parameters, including the mass flow rate M and the hopper angle \ensuremath{\theta}.
, Baxter +3 more
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Aircraft Engineering and Aerospace Technology, 1956
THE accompanying flow pictures arc selected from those used to illustrate the lecturer's notes in a course dealing with viscous fluids. The use of the pictures saves an astonishing amount of lecture time in those categories of study where the real flow patterns agree reasonably with the classical rationalized concepts.
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THE accompanying flow pictures arc selected from those used to illustrate the lecturer's notes in a course dealing with viscous fluids. The use of the pictures saves an astonishing amount of lecture time in those categories of study where the real flow patterns agree reasonably with the classical rationalized concepts.
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Urinary Flow Patterns in Premature Males
Journal of Urology, 2010We sought to assess urinary flow patterns in premature males using ultrasound flow probes.Specifically customized ultrasound flow probes connected to a flowmeter were mounted on the penis of 29 premature males (median gestational age 31.3 weeks). Flow data were sampled to a personal computer and flow curves were assessed with regard to configuration ...
Olsen, Lars Henning +3 more
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Two-Phase Flow Patterns and Flow-Pattern Maps: Fundamentals and Applications
Applied Mechanics Reviews, 2008A comprehensive review of the studies of gas-liquid two-phase flow patterns and flow-pattern maps at adiabatic and diabatic conditions is presented in this paper. Especially, besides other situations, this review addresses the studies on microscale channels, which are of great interest in recent years.
Cheng, Lixin, Ribatski, G., Thome, J.
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Two-Phase Flow Patterns and Flow Pattern Maps
1990Abstract In gas-liquid flow the two phases can adopt various geometric configurations: these are known as flow patterns or flow regimes. Important physical parameters in determining the flow pattern are:
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Flow Patterns: Does Gas/Solids Flow Pattern Correspond to Churn Flow in Gas/Liquid Flow
Industrial & Engineering Chemistry Research, 2008The output of electrical capacitance tomography measurements of gas/solids flow in a vertical pipe have been analyzed to extract flow pattern information. Two approaches already used for gas/liquid flows were employed. One uses the shape of the probability density functions of the cross-sectionally averaged gas fraction time series.
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Spatial Flows and Spatial Patterns
Environment and Planning A: Economy and Space, 1984The misspecification of gravity spatial interaction models has recently been described by the author. The bias in parameter estimates that results from such misspecification appears to produce the ‘map pattern effect’ or ‘spatial structure bias’ in estimated distance-decay parameters.
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