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CFD-PBM simulation of droplets size distribution in rotor-stator mixing devices
Qin, Chengpeng1,2; Chen, Chao1,2; Xiao, Qi1; Yang, Ning1; Yuan, Cansheng3; Kunkelmann, Christian4; Cetinkaya, Murat4; Muelheims, Kerstin4
2016-11-22
Source PublicationCHEMICAL ENGINEERING SCIENCE
ISSN0009-2509
Volume155Issue:NOVPages:16-26
Abstract

Rotor-Stator mixing devices (RS) have found widespread application in mixing, dispersion and emulsification processes to acquire the desirable droplet size distribution (DSD) which is critical to the function and quality of products. Thus the precise control of DSD through the rational design and optimization of process or formulation is highly demanded. Computational fluid dynamics (CFD) becomes increasingly important to simulate the complex turbulence flow in RS devices which has significant impact on the final DSD. CFD can also be integrated with population balance equations (PBE) to predict the DSD as long as the droplet breakage and coalescence rates could be accurately modeled by the kernel functions. However, the underlying physics of droplet breakage and coalescence is complex and far from being well understood. We simulated the liquid-liquid two-phase flow and DSD for a weak coalescence emulsification system in a Megatron RS mixer with the CFD-PBM approach, then tentatively proposed a novel approach for correcting the breakage kernels based on the Energy-Minimization Multi-Scale (EMMS) concept. This method features the multi-scale resolution of energy dissipation, and utilizes the so-called meso-scale energy dissipation to derive a correction factor for the breakage rate for PBE. The results show that the new model can greatly improve the CFD-PBM simulation, and the DSD predicted is in good agreement with experiments, demonstrating the rationality and potential of this new approach. (C) 2016 Elsevier Ltd. All rights reserved.

KeywordRotor-stator Device Emulsification Droplets Breakage Meso-scale Computational Fluid Dynamics Population Balance Modeling
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.ces.2016.07.034
Indexed BySCI
Language英语
WOS KeywordPOPULATION BALANCE-EQUATIONS ; BUBBLE-COLUMNS ; TURBULENT DISPERSIONS ; STABILITY CONDITION ; PIVOT TECHNIQUE ; MODEL ; FLOW ; DISCRETIZATION ; BREAKUP ; MIXERS
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationBASF ; National Natural Science Foundation of China(91434121)
WOS IDWOS:000385600400003
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21570
Collection多相复杂系统国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, POB 353, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.BASF Adv Chem Co Ltd, Shanghai 200137, Peoples R China
4.BASF SE, D-67056 Ludwigshafen, Germany
Recommended Citation
GB/T 7714
Qin, Chengpeng,Chen, Chao,Xiao, Qi,et al. CFD-PBM simulation of droplets size distribution in rotor-stator mixing devices[J]. CHEMICAL ENGINEERING SCIENCE,2016,155(NOV):16-26.
APA Qin, Chengpeng.,Chen, Chao.,Xiao, Qi.,Yang, Ning.,Yuan, Cansheng.,...&Muelheims, Kerstin.(2016).CFD-PBM simulation of droplets size distribution in rotor-stator mixing devices.CHEMICAL ENGINEERING SCIENCE,155(NOV),16-26.
MLA Qin, Chengpeng,et al."CFD-PBM simulation of droplets size distribution in rotor-stator mixing devices".CHEMICAL ENGINEERING SCIENCE 155.NOV(2016):16-26.
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