Horizontal gas mixing in rectangular fluidized bed:A novel method for gas dispersion coefficients in various conditions and distributor designs

Asheesh Nautiyal; Chien-Song Chyang; Pin-Wei Li; Hsin-Yung Hou

doi:10.1016/j.cjche.2016.12.009

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Horizontal gas mixing in rectangular fluidized bed:A novel method for gas dispersion coefficients in various conditions and distributor designs

Fluid Dynamics and Transport Phenomena | Updated：2026-01-06

- Horizontal gas mixing in rectangular fluidized bed:A novel method for gas dispersion coefficients in various conditions and distributor designs
- Horizontal gas mixing in rectangular fluidized bed:A novel method for gas dispersion coefficients in various conditions and distributor designs
- 中国化学工程学报（英文版） 2017年25卷第7期页码：848-861
- Affiliations：
  
  Department of Chemical Engineering, Chung Yuan Christian University, Taoyuan,Taiwan,China,320
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.12.009
  中图分类号：
- 纸质出版：2017
- Accepted：
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Asheesh Nautiyal, Chien-Song Chyang, Pin-Wei Li, 等. Horizontal gas mixing in rectangular fluidized bed:A novel method for gas dispersion coefficients in various conditions and distributor designs[J]. 中国化学工程学报（英文版）, 2017,25(7):848-861.

Asheesh Nautiyal, Chien-Song Chyang, Pin-Wei Li, Hsin-Yung Hou. Horizontal gas mixing in rectangular fluidized bed:A novel method for gas dispersion coefficients in various conditions and distributor designs[J]. , 2017, 25(7): 848-861.
Asheesh Nautiyal, Chien-Song Chyang, Pin-Wei Li, 等. Horizontal gas mixing in rectangular fluidized bed:A novel method for gas dispersion coefficients in various conditions and distributor designs[J]. 中国化学工程学报（英文版）, 2017,25(7):848-861. DOI： 10.1016/j.cjche.2016.12.009.

Asheesh Nautiyal, Chien-Song Chyang, Pin-Wei Li, Hsin-Yung Hou. Horizontal gas mixing in rectangular fluidized bed:A novel method for gas dispersion coefficients in various conditions and distributor designs[J]. , 2017, 25(7): 848-861. DOI： 10.1016/j.cjche.2016.12.009.

摘要

Abstract

In a rectangular fluidized bed combustor

the tracer gas is injected continuously into the bed from a point source at the center of the distributor plate. In this study

a general governing equation is formulated for tracer gas dispersion in the bed. An analytical solution is derived to estimate the dispersion coefficients

and

in a horizontal plane. The concentration profiles at different sampling heights with various gas velocities are plotted. Subsequently

to estimate the dispersion coefficients

surface fitting of the obtained analytical solution to the experimental data is performed. The dispersion coefficients obtained from this model are compared with those of a conventional model. Additionally

the effect of walls

bed height and gas injection rate on the dispersion coefficients in a horizontal plane is investigated

and the effect of distributor design on the dispersion coefficients in a horizontal plane is investigated with different tracer positions. It is found that

and

are nearly equivalent at a lower tracer gas r

atio of the injected gas to the total gas flow rate. It is also demonstrated that the effect of bed height on

is minor. This model is also able to estimate the dispersion coefficients in the case of a multihorizontal nozzle distributor.

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