Axial dispersion in pulsed disk and doughnut columns: A unified law

被引：35

作者：

Charton, Sophie ^{[1
]}

Duhamet, Jean ^{[1
]}

Borda, Gilles ^{[1
]}

Ode, Denis ^{[1
]}

机构：

[1] CEA, DEN, F-30207 Bagnols Sur Ceze, France

来源：

CHEMICAL ENGINEERING SCIENCE | 2012年 / 75卷

关键词：

Dispersion; Extraction; Fluid Mechanics; Hydrodynamics; Pulsed column; Turbulence; PARTICLE IMAGE VELOCIMETRY; EXTRACTION COLUMN; OSCILLATORY FLOW; SIMULATION; LIQUID; SCALE; HYDRODYNAMICS; MODEL; TUBE;

D O I：

10.1016/j.ces.2012.04.011

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

This paper presents the state of the art regarding the understanding of axial mixing in pulsed columns. Residence Time Distribution (RTD) experiments carried out mainly between 1986 and 2002 are reviewed in connection with fluid mechanics studies and CFD simulations. Based on prior work by Buratti (1988), a new model is established to correlate the continuous phase axial dispersion coefficient with the operating conditions in a wide range of operating (pulse intensity up to 7.5 cm s(-1)) and geometric conditions (0.17 <= H/D <= 1.33), thereby reducing the estimation error from 143% to 21% in the case of small-aspect ratio columns (H/D < 1), such as those used in nuclear research, and from 95% to 27% in the case of (possibly annular) industrial size columns. Experimental results are relatively well reproduced by RANS-type computational fluid dynamics (CFD) simulations, provided a low-Reynolds model is used for the turbulent viscosity estimation. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：468 / 477

页数：10

共 30 条

[1] Simulation of flow hydrodynamics in a pulsed solvent extraction column under turbulent regimes [J].