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Processing and Modeling of Alginate Hydrogel for Radiologically-Equivalent Biomedical Phantoms. [PDF]
GelsIlegbusi OJ, Brako GN, Maiti C, Gou J.
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Mechanical Performance of Novel 3D-Printed Symmetric Corrugated Hierarchical Honeycombs. [PDF]
Polymers (Basel)Zhang D +9 more
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Experimental Thermal and Fluid Science, 1993
Abstract A periodic transient test technique based on the axial dispersion model is proposed for the determination of both heat transfer coefficients and axial dispersion coefficients in heat exchangers. The model uses a parameter called the axial dispersive Peclet number to account for the deviation of the flow pattern from ideal plug flow. It takes
Xing Luo, Wilfried Roetzel
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Abstract A periodic transient test technique based on the axial dispersion model is proposed for the determination of both heat transfer coefficients and axial dispersion coefficients in heat exchangers. The model uses a parameter called the axial dispersive Peclet number to account for the deviation of the flow pattern from ideal plug flow. It takes
Xing Luo, Wilfried Roetzel
exaly +2 more sources
Empirical correlations for axial dispersion coefficient and Peclet number in fixed-bed columns
Journal of Chromatography A, 2017In this work, a new correlation for the axial dispersion coefficient was obtained using experimental data in the literature for axial dispersion in fixed-bed columns packed with particles. The Chung and Wen correlation, the De Ligny correlation are two popular empirical correlations. However, the former lacks the molecular diffusion term and the latter
Tingyue Gu, Seyed Omid Rastegar
exaly +3 more sources
Effective axial dispersion coefficients in packed beds under supercritical conditions
Journal of Supercritical Fluids, 1998Abstract Effective axial dispersion coefficients Dax in packed beds were measured by the chromatographic method at 313.2 K both for supercritical CO2 in the pressure range from 11 to 35 MPa and for organic solvents at atmospheric pressure. The Dax values were correlated with the Reynolds number, Schmidt number, binary diffusivity and bed void ...
Toshitaka Funazukuri, Seiichiro Kagei
exaly +2 more sources
Axial dispersion coefficient in high-speed counter-current chromatography
Journal of Chromatography A, 2009Experimental measurements of axial dispersion coefficients in high-speed counter-current chromatography have been carried out in the single-phase and two-phase modes. Axial dispersion coefficients were calculated from the residence time distribution curve (or the elution profile).
Zhao, Chun-Xia +2 more
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Liquid backmixing in bubble columns and the axial dispersion coefficient
AIChE Journal, 1998AbstractLiquid backmixing in bubble columns is commonly described using the 1‐D axial dispersion model, wherein all the contributing mechanisms leading to liquid macromixing are lumped into a single axial dispersion coefficient. No relationship has been reported that allows the quantification of various fluid‐dynamic contributions to the axial ...
Sujatha Degaleesan +1 more
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Experimental determination of axial dispersion coefficient in a bubble column
Chemical Engineering Science, 1980Abstract A new graphical method of finding axial dispersion coefficients in a bubble column is developed. This method requires only the area above an experimental curve, thus is simpler than the conventional method of curve fitting. The new method is used to find the dimensionless dispersion number in the bubble column and shows that the dispersion ...
Soon-Jai Khang, Samir P. Kothari
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On the constancy of axial dispersion coefficients in liquid fluidized beds
The Chemical Engineering Journal, 1992Abstract The assumption of constant axial dispersion coefficient in residence time distribution (RTD) experiments is examined for liquid fluidized beds. Experimental results show this assumption to be violated in short beds. A quantitative criterion is proposed for the constraint required to achieve the true value of the axial dispersion coefficient ...
Mohammad Asif +2 more
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Biotechnology Letters, 1991
The production of CO2 in tower fermenters which can cause back mixing, and thereby reducing the efficiency of such fermenters has been modelled with respect to fermentation. It is confirmed that the effect is significant. The effect of variations in the kinetic parameters, the maximum specific growth rate and the biomass yield coefficient was found to ...
T Setiadi, V. F. Larsen
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The production of CO2 in tower fermenters which can cause back mixing, and thereby reducing the efficiency of such fermenters has been modelled with respect to fermentation. It is confirmed that the effect is significant. The effect of variations in the kinetic parameters, the maximum specific growth rate and the biomass yield coefficient was found to ...
T Setiadi, V. F. Larsen
openaire +1 more source