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Multiphase Science and Technology

Выходит 4 номеров в год

ISSN Печать: 0276-1459

ISSN Онлайн: 1943-6181

SJR: 0.144 SNIP: 0.256 CiteScore™:: 1.1 H-Index: 24

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CFD MODELING OF ADIABATIC BUBBLY FLOW

Том 23, Выпуск 2-4, 2011, pp. 129-164
DOI: 10.1615/MultScienTechn.v23.i2-4.30
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Краткое описание

This paper describes the simulation of adiabatic gas-liquid flow based on the Eulerian approach. An adequate characterization of the momentum exchange between the phases is necessary. The basic experiment investigating the momentum exchange is vertical upward flow in a pipe. This paper describes the main computational fluid dynamics (CFD) approaches for momentum exchange and the comparison to experimental results for several test conditions. For large gas-injection rates, a bubble size distribution including bubble coalescence and fragmentation has to be considered. The paper describes the concept of the inhomogeneous multiple size group model MUSIG, developed by ANSYS/CFX and Helmholtz-Zentrum Dresden-Rossendorf (HZDR), which is implemented in the CFD-code CFX, and a comparable concept of a population balance model implemented in NEPTUNE CFD [Commissariat a l'Energie Atomique (CEA), Électricit é de France (EDF), Institut de Radioprotection et de S ûret é Nucl éaire (IRSN) and AREVA]. Measurements performed at HZDR are used for model validation. Crucial for the quality of the models described are the base approaches for bubble coalescence and fragmentation. Among other influences, these phenomena depend on the level of liquid turbulence. Therefore special attention was devoted to CFD simulation of bubbly turbulent flow based on different model concepts. Concepts based on Reynolds-averaged turbulence models are described. At the Paul Scherrer Institute, large eddy based studies were performed and compared to DEDALE experiments. The work was performed within the NURESIM and NURISP projects under the 6th and 7th European Framework Program.

ЦИТИРОВАНО В
  1. Ziegenhein Thomas, Rzehak Roland, Ma Tian, Lucas Dirk, Towards a unified approach for modelling uniform and non-uniform bubbly flows, The Canadian Journal of Chemical Engineering, 95, 1, 2017. Crossref

  2. Bestion D., Morel C., Balance equations, in Thermal-Hydraulics of Water Cooled Nuclear Reactors, 2017. Crossref

  3. Podowski Michael Z., Is reactor multiphase thermal-hydraulics a mature field of engineering science?, Nuclear Engineering and Design, 345, 2019. Crossref

  4. Wu Junmei, Cao Wei, Cong Tenglong, Numerical investigation on the performance of gas-lift pump with large density ratio of liquid to gas, International Journal of Multiphase Flow, 148, 2022. Crossref

  5. Zuo Juan-Li, Yang Hong, Wei Bing-Qian, Hou Jing-Ming, Zhang Kai, Numerical simulation of gas-liquid two-phase flow in gas lift system, Acta Physica Sinica, 69, 6, 2020. Crossref

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