Numerical Investigation and Estimating Correlation of Micromixing Performance of Coaxial Mixers

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Numerical Investigation and Estimating Correlation of Micromixing Performance of Coaxial Mixers. / Liu, Baoqing; Sun, Ning; Jin, Zhijiang; Zhang, Yikun; Sunden, Bengt.

I: Industrial and Engineering Chemistry Research, Vol. 58, Nr. 49, 11.12.2019, s. 22376-22388.

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

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Liu, Baoqing ; Sun, Ning ; Jin, Zhijiang ; Zhang, Yikun ; Sunden, Bengt. / Numerical Investigation and Estimating Correlation of Micromixing Performance of Coaxial Mixers. I: Industrial and Engineering Chemistry Research. 2019 ; Vol. 58, Nr. 49. s. 22376-22388.

RIS

TY - JOUR

T1 - Numerical Investigation and Estimating Correlation of Micromixing Performance of Coaxial Mixers

AU - Liu, Baoqing

AU - Sun, Ning

AU - Jin, Zhijiang

AU - Zhang, Yikun

AU - Sunden, Bengt

PY - 2019/12/11

Y1 - 2019/12/11

N2 - In view of the significance, complexity, and difficulty of micromixing in viscous system, coaxial mixers with wide adaptability to viscosity are first combined with micromixing. The effects of feeding position, rotation mode, and impeller type on the micromixing performance of coaxial mixers are investigated numerically with the standard engulfment model and eddy dissipation concept model, and a dimensionless estimating correlation of segregation index Xs is established based on the Buckingham πtheorem. The results show that feeding near the discharge zone of the impeller favors the micromixing and Rushton turbine impeller (RT) is better qualified as the impeller near feeding point compared to six-straight-blade turbine impeller (SBT) and six-pitched (45°)-blade turbine impeller (PBT). At the same specific power consumption, the coaxial mixer has better micromixing performance with PBT + RT as inner impeller than with SBT + RT, and the difference of segregation index resulting from the rotation mode is small. Moreover, the proposed correlation is validated to be suitable for qualitative evaluation of micromixing performance of coaxial mixer consisting of inner impeller combining PBT and RT and outer anchor.

AB - In view of the significance, complexity, and difficulty of micromixing in viscous system, coaxial mixers with wide adaptability to viscosity are first combined with micromixing. The effects of feeding position, rotation mode, and impeller type on the micromixing performance of coaxial mixers are investigated numerically with the standard engulfment model and eddy dissipation concept model, and a dimensionless estimating correlation of segregation index Xs is established based on the Buckingham πtheorem. The results show that feeding near the discharge zone of the impeller favors the micromixing and Rushton turbine impeller (RT) is better qualified as the impeller near feeding point compared to six-straight-blade turbine impeller (SBT) and six-pitched (45°)-blade turbine impeller (PBT). At the same specific power consumption, the coaxial mixer has better micromixing performance with PBT + RT as inner impeller than with SBT + RT, and the difference of segregation index resulting from the rotation mode is small. Moreover, the proposed correlation is validated to be suitable for qualitative evaluation of micromixing performance of coaxial mixer consisting of inner impeller combining PBT and RT and outer anchor.

UR - http://www.scopus.com/inward/record.url?scp=85075798004&partnerID=8YFLogxK

U2 - 10.1021/acs.iecr.9b04406

DO - 10.1021/acs.iecr.9b04406

M3 - Article

AN - SCOPUS:85075798004

VL - 58

SP - 22376

EP - 22388

JO - Industrial and Engineering Chemistry Research

JF - Industrial and Engineering Chemistry Research

SN - 0888-5885

IS - 49

ER -