Results 121 to 130 of about 29,766 (166)

Axial dispersion in coiled tubular reactors

Analytica Chimica Acta, 1986
Abstract A theoretical and experimental treatment of axial dispersion in coiled tubes is presented. The dispersion, δ, is related to the theoretical plate height divided by four times the radius of the tube (H/4r). This parameter, when plotted against the product of the Reynolds number and the Schmidt number (ReSc), accurately predicts maxima in ...
Denys F. Leclerc, Carr J. Smith, E.Clifford Toren   +2 more
openaire   +1 more source

Axial dispersion in plate-pulsed columns

Bioprocess Engineering, 1987
The residence time distribution (RTD) of the phase under continuous flow and dispersed flow was measured in a plate-pulsed column under countercurrent liquid-liquid flow, and modelled using (i) the axial dispersion model and (ii) the noninteger ideal stage cascade model. The axial mixing in the continuous phase was found to be significantly higher than
G. Srinikethan, A. Prabhakar, Y. B. G. Varma   +2 more
openaire   +1 more source

Axial and radial dispersion in fixed beds

Chemical Engineering Science, 1987
Several different methods of describing dispersion in fixed beds are defined and compared with experiment by means of a number of criteria for model validity. The principal criteria are statistical adequacy of the model when compared with experiments, consistency of bed-independent parameters when estimated from bed response, and consistency of ...
openaire   +1 more source

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

Axial dispersion in a channel with oscillating walls

Journal of Fluid Mechanics, 1993
An analysis is made of solute transport through a fluid within a long, but finite, channel or pipe whose walls remain parallel but oscillate transversely. When the fluid is viscous, the wall motion causes steady Streaming. Axial dispersion of solute is calculated over a wide parameter range, and mean longitudinal transport is found to be greatly ...
Hydon, P. E., Pedley, T. J.
openaire   +1 more source

Axial dispersion of spheres fluidized with liquids

AIChE Journal, 1966
AbstractSolids dispersion due to the simultaneous diffusion (random particle motion) and classification (segregation) of fluidized spheres has been investigated. The model developed permits calculation of the mean concentration of spheres of both sizes in a mixture of two sizes of fluidized spheres as a function of bed length.
S. C. Kennedy, R. H. Bretton
openaire   +1 more source

Strömungsungleichverteilung und axiale Dispersion in Festbetten

Chemie Ingenieur Technik, 1989
Modelisation de l'ecoulement fluide solide dans un lit de particule. L'etude se fait aux echelles micro, meso et macroscopique a partir des donnees experimentales obtenues a l'aide d'un ...
Evangelos Tsotsas, Ernst‐Ulrich Schlünder   +1 more
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

Axial dispersion in a pulsed plate column

The Canadian Journal of Chemical Engineering, 1974
AbstractA technique involving the indicator colour change in an acidbase reaction has been used to measure axial dispersion coefficients in a 15 cm diameter pulsed column. Data have been obtained mainly for single phase (aqueous) flow with two different types of plate at two different spacings.
openaire   +1 more source