EDDY DIFFUSIVITY AND TURBULENT STRUCTURES IN BUBBLE COLUMNS

Liu Hui; Zhand Zheng(College of Chemical Engineering

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EDDY DIFFUSIVITY AND TURBULENT STRUCTURES IN BUBBLE COLUMNS

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- EDDY DIFFUSIVITY AND TURBULENT STRUCTURES IN BUBBLE COLUMNS
- CIESC Journal Issue 4, (1998)
- 作者机构：
  
  北京化工大学化学工程学院!北京l00029,北京化工大学化学工程学院!北京l,00029
- 作者简介：
- 基金信息：
- DOI：
  CLC： Q02
- Online First：25 August 1998，
  
  Published：25 August 1998
- 稿件说明：
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Liu Hui, Zhand Zheng(College of Chemical Engineering. EDDY DIFFUSIVITY AND TURBULENT STRUCTURES IN BUBBLE COLUMNS[J]. CIESC Journal, 1998, (4).
DOI：

Liu Hui, Zhand Zheng(College of Chemical Engineering. EDDY DIFFUSIVITY AND TURBULENT STRUCTURES IN BUBBLE COLUMNS[J]. CIESC Journal, 1998, (4). DOI：

摘要

依据湍流模式理论提出新的有效涡扩散系数关系式，讨论其与既有关系式的异同并与湍流实测数据比较，结果表明，本文关系式给出与实测值更为一致的结果，而既有的一些关系式的计算值偏高．由此讨论了涡扩散系数与鼓泡塔流动模型的关系，指出了数据偏差产生的原因．

Abstract

Based on the Turbulence Model Theory

a new model for prediction of buld average eddy diffusivity in bubble columns was developed.Comparison of the model results with experimental data available showed that the new relation gave a reliable estimate of the eddy diffusivity

while reported some relations overestimated the eddy diffusivity.Furthermore

the relationship between the turbulence closure procedure and the simplified circulation flow model adopted by many researchers was discussed to explain possible ressons for the above discrepancy.

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