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Investigation of slug-churn flow induced transient excitation forces at pipe bend.

Hossain, Mamdud; Chinenye-Kanu, Nkemjika Mirian; Droubi, Ghazi Mohamad; Islam, Sheikh Zahidul

Authors

Nkemjika Mirian Chinenye-Kanu



Abstract

Numerical simulations of two-phase flow induced fluctuating forces at a pipe bend have been carried out to study the characteristics of multiphase flow induced vibration (FIV). The multiphase flow patterns and turbulence were modelled using the volume of fluid (VOF) method and the k−ϵ turbulence model respectively. Simulations of seventeen cases of slug and churn flows have been carried out showing the effects of superficial gas and superficial liquid velocities. The simulations results show good agreement of the volume fraction fluctuation frequencies of slug and churn flows with the reported experiment. In addition, the vibration characteristics of the excitation force have been accurately captured. The simulation results show that the predominant frequency of fluctuations of force decreases and the RMS of force fluctuation increases with the increase of superficial gas velocity. On the other hand, both predominant frequency and the RMS of force fluctuations increases with the increase of superficial liquid velocity. Increase of gas fraction narrows the range of frequency ranges, while increasing the liquid expands the frequency ranges of force fluctuations.

Citation

HOSSAIN, M., CHINENYE-KANU, N.M., DROUBI, G.M. and ISLAM, S.Z. 2019. Investigation of slug-churn flow induced transient excitation forces at pipe bend. Journal of fluids and structures [online], 91, article ID 102733. Available from: https://doi.org/10.1016/j.jfluidstructs.2019.102733

Journal Article Type Article
Acceptance Date Sep 2, 2019
Online Publication Date Sep 17, 2019
Publication Date Nov 1, 2019
Deposit Date Sep 5, 2019
Publicly Available Date Sep 18, 2020
Journal Journal of Fluids and Structures
Print ISSN 0889-9746
Electronic ISSN 1095-8622
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 91
Article Number 102733
DOI https://doi.org/10.1016/j.jfluidstructs.2019.102733
Keywords Flow induced vibration; Numerical modelling; Pipe bend; Slug/churn flow; Force fluctuations
Public URL https://rgu-repository.worktribe.com/output/479121
Contract Date Sep 5, 2019

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