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A new numerical method for axial dispersion characterization in microreactors [PDF]

Chemical Engineering Science, 2017
Axial dispersion is a key phenomenon in reactor engineering that can affect yield and selectivity when reactions are carried out. Therefore its characterization is necessary for an adequate modelling of the reactor. The development of compact reactors to
Christophe Gourdon, Michel Cabassud
exaly   +2 more sources

DEM investigation of the axial dispersion behavior of a binary mixture in the rotating drum

Powder Technology, 2018
The granular motion of binary-size mixture in a three-dimensional rotating drum operating in the rolling regime is numerically tracked via the discrete element method (DEM), with a focus on the axial dispersion behavior of the different particle types in
Kun Luo, Jia Wei Chew, Liangqi Zhang
exaly   +2 more sources

Axial and radial dispersion in rolling mode rotating drums

Powder Technology, 2005
Single particle trajectories, obtained using the Positron Emission Particle Tracking (PEPT) technique, have been used to characterise axial and radial dispersion of granular media in the rolling drum operated in batch and continuous mode.
Xianfeng Fan, D J Parker, J P K Seville   +2 more
exaly   +2 more sources

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Axial dispersion in respiratory bronchioles and alveolar ducts

Journal of Applied Physiology, 1988
The 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, 1962
The 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.
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Axial dispersion in a reciprocating plate column

The Canadian Journal of Chemical Engineering, 1996
AbstractAxial 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
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Axial dispersion in a rectangular bubble column

The Canadian Journal of Chemical Engineering, 1977
AbstractThis 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
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Dynamics Of Axially Dispersed Reactors

Industrial & Engineering Chemistry Research, 2008
Axially 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.
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A numerical analysis of axial dispersion in electrolyzers

Electrochimica Acta, 1987
Abstract 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
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Modelling the axial dispersion of particles in froths

International Journal of Mineral Processing, 2007
Abstract The separation achieved through flotation is dependent on the selective attachment of mineral particles to bubble surfaces. However, the majority of solids collected have been attributed to unattached particles. This is due to the release of attached particles from bubble surfaces due to bursting on the top of the froth and coalescence ...
J.R. Meloy, S.J. Neethling, J.J. Cilliers   +2 more
openaire   +1 more source