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Fluid-Structure Interaction of Multiphase Flow within a Pipe Bend

HUAT, TAN CHEE (2015) Fluid-Structure Interaction of Multiphase Flow within a Pipe Bend. IRC, Universiti Teknologi PETRONAS. (Unpublished)

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Multiphase flows are any fluid flow consisting of more than one phase or component, such as gas-liquid flow, liquid-liquid flow, liquid-solid flow or gas-liquidsolid- flow. It is commonly found in fluid transportation systems, particularly the hydrocarbons transportation systems in the oil and gas industry, accounted by simultaneous production of natural gases and crude oil. A significant response arising from flow-induced vibration could lead to potential fatigue damage or uncontrolled vibration when the excitation frequency matches the natural frequencies of the piping system, particularly in cases where oil brings dense sand particles or when slug flow develops in the flow-lines. This is therefore why the investigation of the effects of the oil-gas-water mixture on the structure of pipelines is important. Multiphase flow problems remain a challenge to the industry due to its complexity and unpredictability. This paper presents an analysis of fluid-structure interaction between a two-phase flow and a pipe bend to determine the resulting vibrations induced by the two-phase flow. Two pipe bend models with different upstream and downstream lengths of the bend are used for the analysis. Natural frequencies of the pipe bend structures are extracted and numerical simulations are performed using a CFD solver (ANSYS CFX module) and a FEA solver (ANSYS Mechanical module) coupled within ANSYS Workbench. Through Fast Fourier transforming the time domain results into frequency domain, the frequencies of vibrations are collected and compared with the natural frequencies to determine the corresponding level of risks.

Item Type: Final Year Project
Academic Subject : Academic Department - Mechanical Engineering - Petroleum
Subject: T Technology > TJ Mechanical engineering and machinery
Divisions: Engineering > Mechanical
Depositing User: Ahmad Suhairi Mohamed Lazim
Date Deposited: 07 Oct 2015 10:19
Last Modified: 25 Jan 2017 09:36
URI: http://utpedia.utp.edu.my/id/eprint/15715

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