Results 231 to 240 of about 9,521,895 (308)
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Comparing flow resistance law for fixed and mobile bed rills
Hydrological Processes, 2019Rills caused by run‐off concentration on erodible hillslopes have very irregular profiles and cross‐section shapes. Rill erosion directly depends on the hydraulics of flow in the rills, which may differ greatly from hydraulics of flow in larger and ...
C. Di Stefano +4 more
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Lung, 1989
In the past it has been generally assumed that pulmonary flow resistance (RL) increases with increasing flow and decreases with increasing lung volume. Recent work indicates that RL decreases with increasing flow, at least up to flow rates 3-4 times greater than those at rest, and increases progressively with increasing lung volume.
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In the past it has been generally assumed that pulmonary flow resistance (RL) increases with increasing flow and decreases with increasing lung volume. Recent work indicates that RL decreases with increasing flow, at least up to flow rates 3-4 times greater than those at rest, and increases progressively with increasing lung volume.
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Rill flow resistance law under equilibrium bed‐load transport conditions
Hydrological Processes, 2019In this paper, a recently deduced flow resistance equation for open channel flow was tested under equilibrium bed‐load transport conditions in a rill. First, the flow resistance equation was deduced applying dimensional analysis and the incomplete self ...
C. Di Stefano +4 more
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Flow Resistance of Textile Materials
Textile Research Journal, 2003Part I of this series presented a new model for predicting the flow resistance of monofilament fabrics. In this part, the model is applied to the flow resistance of multi filament fabrics. Experiments show that flow resistance in multifilament fabrics can be modeled in general, but it appears that the method is not suitable for modeling flow resistance
Gooijer, H. +2 more
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Reference Module in Earth Systems and Environmental Sciences, 2019
The mean velocity of a river is set by the balance between gravitational driving force, which depends on depth and slope, and friction due to grain roughness and form drag.
R. Ferguson
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The mean velocity of a river is set by the balance between gravitational driving force, which depends on depth and slope, and friction due to grain roughness and form drag.
R. Ferguson
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Flow Resistance in Tracheotomy Tubes
Annals of Otology, Rhinology & Laryngology, 1973The role of the upper airway (the breathing passage above the trachea) in maintaining the normal junction of the respiratory system has been suggested by previous investigators. During a tracheotomy the upper airway is by-passed by a prosthetic metal or plastic tube which is placed into the trachea through the neck.
J, Cavo +3 more
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Resistance to fluid flow in veins
Journal of Clinical Monitoring, 1996We evaluated the resistance to fluid infusion in the veins of 118 adult patients after intravenous catheter insertion prior to elective surgery. Hydraulic resistance in veins was defined as the slope of the pressure-flow relationship obtained by measuring venous pressure at several fluid flow rates.
D A, Scott +7 more
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The Resistance to Blood Flow in the Capillaries
Canadian Journal of Physiology and Pharmacology, 1972The pressure–flow relations of single erythrocytes and of heparinized whole blood flowing through glass tubes 4–15 μm in diameter have been studied. Driving pressures ranging from 0 to 8 cm H2O were used to produce mean velocities of flow of 0–1000 μm∙s−1. The velocities were measured by high-speed cinemicrophotography.
A W, Jay, S, Rowlands, L, Skibo
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Resistivity of flowing salt solutions
Journal of Applied Physiology, 1965The longitudinal resistance of salt solutions flowing in rigid tubes is found to change by less than frac14 of 1% for flow velocities up to and exceeding the turbulent rate. The reduced resistance of flowing blood as contrasted to stationary blood is thus not due to altered resistance of the fluid proper rheoencephalogram; blood flow; impedance ...
R, McFee, A R, Spatuzzi
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Resistance to Flow in Vascular Beds
Nature, 1958THE concept of resistance to flow is widely used by physiologists and clinicians when inferring vessel behaviour from pressure and flow data. For a great number of years ‘resistance to flow’ has been defined by physiologists as the ratio of the pressure drop across a vessel system to the flow that results. As so defined, Burton1 has pointed out that “…
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