Results 231 to 240 of about 13,095 (260)
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The Chemical Engineering Journal, 1973
Abstract The simplest way of testing flow systems for non-ideal flow behaviour is based on the axially dispersed plug-flow model. A very simple experimental technique involves manually injecting a dose of tracer into the system and following the resulting response(s) down-stream. A method is proposed using a general description fitting to such pulses
M. Šáchová, Z. Štěrbáček
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Abstract The simplest way of testing flow systems for non-ideal flow behaviour is based on the axially dispersed plug-flow model. A very simple experimental technique involves manually injecting a dose of tracer into the system and following the resulting response(s) down-stream. A method is proposed using a general description fitting to such pulses
M. Šáchová, Z. Štěrbáček
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Identification of axial dispersion coefficients by model method in gas/liquid/solid fluidised beds
Chemical Engineering and Processing: Process Intensification, 2001The axial dispersion coefficient, representative of the hydrodynamic behaviour of a fluidised bed, is determined by the model method. This method must be able to simulate the model. Therefore, a discretisation by orthogonal collocation is performed. Then, this determination is carried out in a fluidised bed, which tries to simulate an anaerobic biogas ...
B. Giojelli +4 more
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Experimental Thermal and Fluid Science, 2017
Abstract The aim of the present work is to propose a simple, reliable and effective model of hydrodynamics in fluidized bed reactor (FBR). The long-term objective of these models is to be able to use them for modeling and optimization of adsorption processes in fluidized bed columns.
Khaled, Ghozlane +5 more
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Abstract The aim of the present work is to propose a simple, reliable and effective model of hydrodynamics in fluidized bed reactor (FBR). The long-term objective of these models is to be able to use them for modeling and optimization of adsorption processes in fluidized bed columns.
Khaled, Ghozlane +5 more
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Revue Générale de Thermique, 1997
Residence time measurements are introduced as a transient measurement technique for the fast and convenient determination of axial dispersion coefficients in plate heat exchangers. In front of the exchanger inlet a salt solution pulse is injected into the steady flow stream and propagates with dispersion to the exit of the exchanger.
Wilfried Roetzel, Frank Balzereit
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Residence time measurements are introduced as a transient measurement technique for the fast and convenient determination of axial dispersion coefficients in plate heat exchangers. In front of the exchanger inlet a salt solution pulse is injected into the steady flow stream and propagates with dispersion to the exit of the exchanger.
Wilfried Roetzel, Frank Balzereit
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Turbulent axial dispersion coefficients in the liquid in a two‐phase bubble column
AIChE Journal, 1984Formulation d'un modele simple permettant d'evaluer le coefficient de diffusion axiale turbulente dans une colonne a bulles ...
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Gas‐bubble hold‐up and axial dispersion coefficient of emulsion phases in fluidized beds
The Canadian Journal of Chemical Engineering, 1987AbstractA model for liquid mixing in a gas‐liquid bubble column is extended to predict gas‐bubble hold‐up and axial dispersion coefficient of emulsion phases in fluidized beds. Reasonable agreement is found between the proposed model which includes no adjustable parameter and the available experimental data and correlations.
Y. Kawase, M. Moo‐Young
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Principal Axes and Values of the Dispersion Coefficient in the 2D Axially Symmetric Porous Medium
2010We perform the diagonalization of the 2nd rank dispersion tensor D ij in the 2-dim anisotropic porous medium with two mirror lines, which are perpendicular to each other. We derive the eigenvalues of the matrix and calculate an angular measure of anisotropy.
Leonid G. Fel, Jacob Bear
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Industrial & Engineering Chemistry Research, 1997
Independent determinations of the coefficients of axial dispersion and of the mass-transfer kinetics have been found to be concentration dependent in protein chromatography. The consequences of this observation are studied on a theoretical basis. Numerical calculations of breakthrough curves were carried out, assuming a linear dependence of these ...
Guoming Zhong +2 more
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Independent determinations of the coefficients of axial dispersion and of the mass-transfer kinetics have been found to be concentration dependent in protein chromatography. The consequences of this observation are studied on a theoretical basis. Numerical calculations of breakthrough curves were carried out, assuming a linear dependence of these ...
Guoming Zhong +2 more
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Axial dispersion coefficients in bubble columns
The Chemical Engineering Journal, 1976B.F. Alexander, Y.T. Shah
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Axial dispersion coefficient measurement in two‐phase flow
AIChE Journal, 1968A. Gomezplata, R. W. Brown
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