Turbulent Mixing and Scale-Up of Ejectors at High Schmidt Number

Lian Xiang Ma; Rong Shan Bi; Xin Shun Tan; Zhen Dong Liu; Wen Wu Chen; Shi Qing Zheng

doi:10.4028/www.scientific.net/AMR.233-235.1340

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 233-235Turbulent Mixing and Scale-Up of Ejectors at High...

Turbulent Mixing and Scale-Up of Ejectors at High Schmidt Number

Abstract:

Micro- and Macro-mixing models were built and numerical investigation of turbulent mixing in ejectors was carried out. Mixture fraction and its variance presented by Fox were remodeled to demonstrate micro- and macro-mixing performance. The length needed to reach 98% micro- and macro-mixing were founded is functions of u_j/u_m and D/d. The mathematical scale-up models were presented based on the simulation results using least square method for micro- and macro-mixing and five different cases were used to validate the models. The results showed that macro-mixing scale-up model agreed well with CFD simulations but the micro-mixing scale-up model had a less precision compared with that of macro-mixing model. This because that the mechanism of micro-mixing process is very complexity but the CFD models we used in this work are fairy simple.

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Periodical:

Advanced Materials Research (Volumes 233-235)

Pages:

1340-1344

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.233-235.1340

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Online since:

May 2011

Authors:

Lian Xiang Ma, Rong Shan Bi, Xin Shun Tan, Zhen Dong Liu, Wen Wu Chen, Shi Qing Zheng

Keywords:

Ejectors, Multi-Scale, Scale-Up, Turbulent Mixing

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