Results 251 to 260 of about 1,963,356 (295)
Effect of microchannel aspect ratio on residence time distributions and the axial dispersion coefficient [PDF]
Chemical Engineering and Processing: Process Intensification, 2009 Abstract The effect of microchannel aspect ratio (channel depth/channel width) on residence time distributions and the axial dispersion coefficient have been investigated for Newtonian and shear-thinning non-Newtonian flow using computational fluid dynamics. The results reveal that for a fixed cross-sectional area and throughput, there is a narrowing
Joelle Aubin, Laurent Prat, C Xuereb
exaly +6 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 +2 more
exaly +3 more sources
Some of the next articles are maybe not open access.
Related searches:
Related searches:
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
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
W. Roetzel, X. Luo, Y. Xuan
openaire +1 more source
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
W. Roetzel, X. Luo, Y. Xuan
openaire +1 more source
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
openaire +4 more sources
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source