Calculation of Metzner Constant for Double Helical Ribbon Impeller by Computational Fluid Dynamic Method

张敏革; 张吕鸿; 姜斌; 尹玉国; 李鑫钢

doi:10.1016/S1004-9541(08)60141-X

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Calculation of Metzner Constant for Double Helical Ribbon Impeller by Computational Fluid Dynamic Method

评述 | Updated：2026-01-06

- Calculation of Metzner Constant for Double Helical Ribbon Impeller by Computational Fluid Dynamic Method
- Chinese Journal of Chemical Engineering Vol. 16, Issue 5, Pages: 686-692(2008)
- Affiliations：
  
  National Engineering Research Centre of Distillation Technology,Tianjin,China,300072
- Author bio：
- Funds：
- DOI：10.1016/S1004-9541(08)60141-X
  CLC：
- Published：2008
- Accepted：
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ZHANG Minge, ZHANG Lühong, JIANG Bin, YIN Yuguo, LI Xingang. Calculation of Metzner Constant for Double Helical Ribbon Impeller by Computational Fluid Dynamic Method[J]. Chin.J.Chem.Eng., 2008, 16(5): 686-692.
DOI：

ZHANG Minge, ZHANG Lühong, JIANG Bin, YIN Yuguo, LI Xingang. Calculation of Metzner Constant for Double Helical Ribbon Impeller by Computational Fluid Dynamic Method[J]. Chin.J.Chem.Eng., 2008, 16(5): 686-692. DOI： 10.1016/S1004-9541(08)60141-X.

摘要

Abstract

Using the multiple reference frames(MRF)impeller method

the three-dimensional non-Newtonian flow field generated by a double helical ribbon(DHR)impeller has been simulated.The velocity field calculated by the numerical simulation was similar to the previous studies and the power constant agreed well with the experimental data.Three computational fluid dynamic(CFD)methods

labeled I

Ⅱ and Ⅲ

were used to compute the Metzner constant ks.The results showed that the calculated value from the slop method(method I)was consistent with the experimental data.Method II

which took the maximal circumference-average shear rate around the impeller as the effective shear rate to compute ks

also showed good agreement with the experiment.However

both methods suffer from the complexity of calculation procedures.A new method(method Ⅲ)was devised in this paper to use the area-weighted average viscosity around the impeller as the effective viscosity for calculating ks.Method Ⅲshowed both good accuracy and ease of use.

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