Results 211 to 220 of about 27,250 (260)

Capillary flow in microchannels

Microfluidics and Nanofluidics, 2009
The surface of microchannels, especially polymer channels, often needs to be treated to acquire specific properties. This study investigated the capillary flow and the interface behavior in several glass capillaries and fabricated microchannels using a photographic technique and image analysis.
Y. Zhu, K. Petkovic-Duran
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Capillary electrochromatography with segmented capillaries for controlling electroosmotic flow

Electrophoresis, 1999
Capillaries consisting of two segments each packed with a different stationary phase were introduced for the control and manipulation of the electroosmotic flow (EOF) in capillary electrochromatography (CEC). This kind of column configuration was called segmented capillary where one segment was packed with octadecyl silica (ODS) and served as the ...
C, Yang, Z, El Rassi
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Modeling of Coronary Capillary Flow

1993
The coronary capillary flow is analyzed theoretically based on the laws of continuum mechanics. The capillary is considered as a long, elastic and permeable vessel loaded externally by tissue pressure. It is subjected to periodic length changes, together with adjacent myocytes.
G, Fibich, Y, Lanir, N, Liron, M, Abovsky   +3 more
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Blood flow in the capillary bed

Journal of Biomechanics, 1969
Abstract From arteries to veins, the blood has to go through the ‘capillary’ blood vessels. These blood vessels are so small that often their diameter is smaller than that of the red blood cells. Intimate interactions occur, therefore, between the blood cells and the blood vessels. A general survey of recent works on capillary blood flow is given in
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On the nonuniformity of a capillary flow

Technical Physics Letters, 2007
It is established that the capillary rise of a liquid has an oscillatory character, in contrast to the commonly accepted opinion that a vertical capillary is filled at a monotonically varying velocity. The value of the tangential shear stress arising in an ascending liquid is evaluated for ethyl alcohol and distilled water.
V. I. Volkov, D. Yu. Kozlov, E. R. Kirkolup   +2 more
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The capillary flow of silicones

Journal of Applied Polymer Science, 1963
AbstractThe non‐Newtonian flow of silicone fluids in capillaries was investigated with special emphasis on the viscoelastic nature of entrance and exit effects. At low pressures the power law was obeyed, while at high pressures considerable deviations were observed, particularly with short capillaries. For capillaries with large length‐to‐radius ratios,
Donald L. Johnson, Eric Baer
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Heating in Capillary Flow

Nature, 1962
THE temperature profile in an essentially Newtonian liquid in laminar flow in a capillary has been measured experimentally. Previously the phenomenon of capillary heating (that is, heat produced by the internal friction of liquids in flow in a capillary) had been the subject of extensive theoretical treatment1,2; but with little experimental ...
J. E. GERRARD, J. K. APPELDOORN, W. PHILIPPOFF   +2 more
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Multiphase capillary flows

International Journal of Multiphase Flow, 2012
Abstract We present here a model of the meniscus movement within uniform capillaries that explicitly accounts for the effect of the gas phase. The total momentum was assumed to change by the gravitational, viscous, surface, dissipative and boundary forces, and included dynamical effects due to variable contact angle and the reservoirs adjacent the ...
Federico Maggi, Fernando Alonso-Marroquin   +1 more
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Flow of Polyethylene into a Capillary

Journal of Applied Physics, 1960
The flow of polyethylene from a reservoir into a capillary has been studied visually using a new technique for observing the flow patterns. Various patterns observed with different polyethylenes are shown, both below and above the critical shearing stress at which the extrudate becomes distorted.
E. B. Bagley, A. M. Birks
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Flow patterns of blood cells in the retinal capillaries

International Ophthalmology, 1992
We present a new technique for retinal blood cell angiography which was used to investigate flow patterns of blood cells in the retinal capillary net of normal cats. Capillary paths were defined to be the path taken by the labelled blood cells from the terminal arteriole to the entry point into a collecting venule.
J, Ben-nun, V, Alder, D, Thompson, I J, Constable   +3 more
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