@article { , title = {Investigation of the effects of pipe diameter of internal multiphase flow on pipe elbow vibration and resonance.}, abstract = {Computational fluid dynamics modelling of internal two-phase flow induced transient forces at 90° elbows have been carried out to evaluate the effect of pipe diameter on the characteristics of multiphase flow induced vibration. Simulations of two-phase flows of slug, cap bubbly and churn induced vibration at a pipe elbow were carried out using the volume of fluid model for the two-phase flows and the k – ε model for turbulence. Modal analysis has been carried out to evaluate the risk of resonance. Results were compared across three geometrically similar pipes of different diameters. Simulation results showed that the behaviours of the flow induced forces at the pipe elbow as a function of gas velocity for internal diameters of 0.0525 and 0.2032 m are similar. However, the multiphase flow induced force characteristics are different in the 0.1016 m diameter (intermediate) pipe. It can be attributed to the transition behaviour of gas–liquid two-phase flows caused by Taylor instability in an intermediate sized pipe. The predicted root-mean-square flow induced forces as a function of Weber number were correlated with an existing empirical correlation for a wider range of pipe sizes and gas volume fractions between 40\% and 80\%. Furthermore, the pipe natural frequencies increase with the increase of gas volume fraction in smaller pipes and the resonance risk increases with the increase of pipe diameter.}, doi = {10.1177/09544089221115520}, eissn = {2041-3009}, issn = {0954-4089}, issue = {4}, journal = {Proceedings of the Institution of Mechanical Engineers, Part E: Journal of process mechanical engineering}, note = {INFO COMPLETE (Now published, checked and updated 7/8/2023 LM; Still Online First 23/1/2023 LM; Record added by Worktribe 29/8/2022 LM) PERMISSION GRANTED (version = VOR; embargo = none; licence = by; SHERPA = https://v2.sherpa.ac.uk/id/publication/19333 1/8/2022 LM) DOCUMENT READY (Final VOR uploaded 7/8/2023 LM; Online First VOR downloaded 1/8/2022 LM) ADDITIONAL INFO - Contact: Mamdud Hossain; Ghazi Drobi; Sheikh Islam Set Statement (Users who access an article in a repository may use the article in any manner consistent with the terms of the Creative Commons license attached to the article. For more information on the terms of use and summary of the Creative Commons licenses, please see our Reusing Open Access and Sage Choice Content webpage.)}, pages = {1319-1330}, publicationstatus = {Published}, publisher = {SAGE Publications}, url = {https://rgu-repository.worktribe.com/output/1721759}, volume = {237}, keyword = {Environment, Energy & Sustainability, Two-phase flow induced vibration, Numerical modelling, Force fluctuations, Natural frequency, Resonance}, year = {2023}, author = {Asiegbu, Nkemjika Mirian and Hossain, Mamdud and Droubi, Ghazi Mohamad and Islam, Sheikh Zahidul} }