Numerical Investigation and Estimating Correlation of Micromixing Performance of Coaxial Mixers
(2019) In Industrial and Engineering Chemistry Research 58(49). p.22376-22388- Abstract
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... (More)
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.
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- author
- Liu, Baoqing LU ; Sun, Ning ; Jin, Zhijiang ; Zhang, Yikun and Sunden, Bengt LU
- organization
- publishing date
- 2019-12-11
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Industrial and Engineering Chemistry Research
- volume
- 58
- issue
- 49
- pages
- 13 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- scopus:85075798004
- ISSN
- 0888-5885
- DOI
- 10.1021/acs.iecr.9b04406
- language
- English
- LU publication?
- yes
- id
- da345e5e-9e6f-4d85-9e83-bdb85dcb5424
- date added to LUP
- 2019-12-16 14:54:24
- date last changed
- 2022-04-18 19:33:29
@article{da345e5e-9e6f-4d85-9e83-bdb85dcb5424, abstract = {{<p>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 X<sub>s</sub> 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.</p>}}, author = {{Liu, Baoqing and Sun, Ning and Jin, Zhijiang and Zhang, Yikun and Sunden, Bengt}}, issn = {{0888-5885}}, language = {{eng}}, month = {{12}}, number = {{49}}, pages = {{22376--22388}}, publisher = {{The American Chemical Society (ACS)}}, series = {{Industrial and Engineering Chemistry Research}}, title = {{Numerical Investigation and Estimating Correlation of Micromixing Performance of Coaxial Mixers}}, url = {{http://dx.doi.org/10.1021/acs.iecr.9b04406}}, doi = {{10.1021/acs.iecr.9b04406}}, volume = {{58}}, year = {{2019}}, }