Results 151 to 160 of about 833,093 (205)
Some of the next articles are maybe not open access.
1992
Abstract The treatment in the previous chapter relates specifically to pure plug flow, which in practice occurs only in extractors such as discrete-stage mixer-settlers and perforated plate columns where phase separation is virtually complete between stages.
H R C Pratt, G W Stevens
openaire +1 more source
Abstract The treatment in the previous chapter relates specifically to pure plug flow, which in practice occurs only in extractors such as discrete-stage mixer-settlers and perforated plate columns where phase separation is virtually complete between stages.
H R C Pratt, G W Stevens
openaire +1 more source
Augmentation of Axial Dispersion by Intermittent Oscillatory Flow
Journal of Biomechanical Engineering, 1998The efficiency of axial gas dispersion during ventilation with high-frequency oscillation (HFO) is improved by manipulating the oscillatory flow waveform such that intermittent oscillatory flow occurs. We therefore measured the velocity profiles and effective axial gas diffusivity during intermittent oscillatory flow in a straight tube to verify the ...
G, Tanaka, Y, Ueda, K, Tanishita
openaire +2 more sources
Microscopic calculation of axial dispersion for quaterthiophene crystals
Journal of Luminescence, 2005We present a microscopic calculation of the axial dispersion for the quaterthiophene crystal in a spectral region including the first and higher molecular excited states. After evaluating the complex dielectric tensor near the corresponding Frenkel excitons we observe that two of the principal axes referring to the upper Davydov states rotate with ...
LAICINI, MARCO +6 more
openaire +1 more source
Axial dispersion in respiratory bronchioles and alveolar ducts
Journal of Applied Physiology, 1988The mixing of gases in the pulmonary acinus was characterized by analyzing axial gas dispersion during steady flow in models of respiratory bronchioles and alveolar ducts. An analysis (method of moments) developed for addressing dispersion in porous media was used to derive an integral expression for the axial dispersion coefficient (D*).
W J, Federspiel, J J, Fredberg
openaire +2 more sources
Dispersion of Axially Symmetric Waves in Elastic Rods
Journal of Applied Mechanics, 1962The relation between frequency and propagation constant, for axially symmetric waves in an infinitely long, isotropic, circular rod, as given by Pochhammer’s equation, is explored. A spectrum, covering a large range of frequencies, is developed for real, imaginary, and complex propagation constants, and the influence of Poisson’s ratio is described.
Onoe, M., McNiven, H. D., Mindlin, R. D.
openaire +2 more sources
Experimental characterization of axial dispersion in coiled flow inverters [PDF]
Chemical Engineering Research and Design, 2017 Narrow residence time distributions (RTDs) are desirable in many chemical engineering processes. However, when a system operates in the laminar flow regime, significant fluid dynamic dispersion takes place.
Luca Mazzei, Asterios Gavriilidis
exaly +3 more sources
Axial dispersion in a reciprocating plate column
The Canadian Journal of Chemical Engineering, 1996AbstractAxial mixing in a reciprocating plate column with different amplitudes has been investigated for single‐phase and two‐phase (air‐water) systems. Experiments were performed in water in a semi‐batch scheme (no water flow) in a 1.26 m high and 101.6 mm internal diameter column.It was found that the axial dispersion coefficient is a strong function
Mustapha Lounes, Jules Thibault
openaire +1 more source
Axial dispersion in a rectangular bubble column
The Canadian Journal of Chemical Engineering, 1977AbstractThis paper presents the results of an experimental study on the gas holdup and the liquid phase axial dispersion coefficient in a narrow packed and unpacked rectangular bubble column. In both cases the gas and liquid flow rates were varied and the data were obtained by employing standard tracer technique. The gas holdup and the axial dispersion
G. J. Stiegel, Y. T. Shah
openaire +1 more source
Dynamics Of Axially Dispersed Reactors
Industrial & Engineering Chemistry Research, 2008Axially dispersed reactors with simultaneous convection, dispersion, and reaction might be used to approximate real reactors. While the steady-state solution to an axially dispersed reactor is well-described in the literature, its dynamic behavior is not often discussed.
openaire +1 more source
A numerical analysis of axial dispersion in electrolyzers
Electrochimica Acta, 1987Abstract An efficient approximate numerical method based on the principle of orthogonal collocation is presented for the computation of steady-state and transient active-ion concentration profiles in electrolyzers with axial dispersion.
R.W. Yeo, T.Z. Fahidy
openaire +1 more source