Journal Pre-proof CFD simulation of bubbly ﬂow around an obstacle in a vertical pipe with a focus on breakup and coalescence modelling Sibel Tas-Koehler , Martin Neumann-Kipping , Yixiang Liao , Eckhard Krepper , Uwe Hampel PII: S0301-9322(20)30639-X DOI: https://doi.org/10.1016/j.ijmultiphaseﬂow.2020.103528 Reference: IJMF 103528 To appear in: International Journal of Multiphase Flow Received date: 15 June 2020 Revised date: 9 November 2020 Accepted date: 22 November 2020 Please cite this article as: Sibel Tas-Koehler , Martin Neumann-Kipping , Yixiang Liao , Eckhard Krepper , Uwe Hampel , CFD simulation of bubbly ﬂow around an obstacle in a verti- cal pipe with a focus on breakup and coalescence modelling, International Journal of Multiphase Flow (2020), doi: https://doi.org/10.1016/j.ijmultiphaseﬂow.2020.103528 This is a PDF ﬁle of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the deﬁnitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its ﬁnal form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. © 2020 Published by Elsevier Ltd.