MIXING DYNAMICS OF STRATIFIED VORTEX PAST TILTED PIPELINE

The study of vortex dynamics is an important field in fluid mechanics as vortex has the potential to induce vibration, namely vortex induced vibration (VIV), which can deteriorate the stability and integrity of structures. To prevent accidents due to vortices, a thorough study on vortex physics is n...

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Main Author: YUAN, SHU SHIK
Format: Final Year Project
Language: English
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-utpedia.17962 /
Published: IRC 2017
Subjects:
TJ Mechanical engineering and machinery
Online Access: http://utpedia.utp.edu.my/17962/1/SHU-SHIK-YUAN_18323_Dissertation.pdf
http://utpedia.utp.edu.my/17962/
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spelling utp-utpedia.179622018-08-01T09:53:29Z http://utpedia.utp.edu.my/17962/ MIXING DYNAMICS OF STRATIFIED VORTEX PAST TILTED PIPELINE YUAN, SHU SHIK TJ Mechanical engineering and machinery The study of vortex dynamics is an important field in fluid mechanics as vortex has the potential to induce vibration, namely vortex induced vibration (VIV), which can deteriorate the stability and integrity of structures. To prevent accidents due to vortices, a thorough study on vortex physics is necessary. In previous studies, a lot of researches have been conducted on the stratified vortex, through numerical or experimental approaches. However, when comes to a stratified vortex which is formed when a wave past through a tilted pipeline, there is still insufficient study focus on it. The primary objective in this study is to develop a CFD model which simulates the stratified vortex formation when a wave past through a vertical or tilted pipeline in a wave tank, using ANSYS Fluent CFD approach. Also, the effect of tilting this pipeline on the surrounding fluid flow condition and the vortex formation will be investigated. As this study will only focus on the fundamental and theoretical aspects of vortex, application of it in real work will not be included as the scope is limited. A 2D preliminary piston wave tank model is first developed based on Du & Leung (2011) piston wave tank, and is validated against the result in paper. After that, the 2D model is then expanded into 3D model. Further modification is done by inserting pipeline into the model, and changing the water property from single density to stratified condition. The two models developed in the end will be the models having vertical and 5° tilted pipeline, with stratified water in the wave tank. It is found that when a wave past through the pipeline, the velocity contour around the pipeline is highly resembling the initial formation of a von Karman vortex. When tilting the pipeline to right by 5° instead of placing it vertically, the stratified columnar vortex will twist slightly, as compared to the vertical columnar vortex in the vertical pipeline case. Using Reynolds number analysis, the vertical pipeline model is experiencing higher turbulence as compared to the tilted pipeline model, when the similar wave past the pipelines. IRC 2017-01 Final Year Project NonPeerReviewed application/pdf en http://utpedia.utp.edu.my/17962/1/SHU-SHIK-YUAN_18323_Dissertation.pdf YUAN, SHU SHIK (2017) MIXING DYNAMICS OF STRATIFIED VORTEX PAST TILTED PIPELINE. IRC, Universiti Teknologi PETRONAS.
institution Universiti Teknologi Petronas
collection UTPedia
language English
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
YUAN, SHU SHIK
MIXING DYNAMICS OF STRATIFIED VORTEX PAST TILTED PIPELINE
description The study of vortex dynamics is an important field in fluid mechanics as vortex has the potential to induce vibration, namely vortex induced vibration (VIV), which can deteriorate the stability and integrity of structures. To prevent accidents due to vortices, a thorough study on vortex physics is necessary. In previous studies, a lot of researches have been conducted on the stratified vortex, through numerical or experimental approaches. However, when comes to a stratified vortex which is formed when a wave past through a tilted pipeline, there is still insufficient study focus on it. The primary objective in this study is to develop a CFD model which simulates the stratified vortex formation when a wave past through a vertical or tilted pipeline in a wave tank, using ANSYS Fluent CFD approach. Also, the effect of tilting this pipeline on the surrounding fluid flow condition and the vortex formation will be investigated. As this study will only focus on the fundamental and theoretical aspects of vortex, application of it in real work will not be included as the scope is limited. A 2D preliminary piston wave tank model is first developed based on Du & Leung (2011) piston wave tank, and is validated against the result in paper. After that, the 2D model is then expanded into 3D model. Further modification is done by inserting pipeline into the model, and changing the water property from single density to stratified condition. The two models developed in the end will be the models having vertical and 5° tilted pipeline, with stratified water in the wave tank. It is found that when a wave past through the pipeline, the velocity contour around the pipeline is highly resembling the initial formation of a von Karman vortex. When tilting the pipeline to right by 5° instead of placing it vertically, the stratified columnar vortex will twist slightly, as compared to the vertical columnar vortex in the vertical pipeline case. Using Reynolds number analysis, the vertical pipeline model is experiencing higher turbulence as compared to the tilted pipeline model, when the similar wave past the pipelines.
format Final Year Project
author YUAN, SHU SHIK
author_sort YUAN, SHU SHIK
title MIXING DYNAMICS OF STRATIFIED VORTEX PAST TILTED PIPELINE
title_short MIXING DYNAMICS OF STRATIFIED VORTEX PAST TILTED PIPELINE
title_full MIXING DYNAMICS OF STRATIFIED VORTEX PAST TILTED PIPELINE
title_fullStr MIXING DYNAMICS OF STRATIFIED VORTEX PAST TILTED PIPELINE
title_full_unstemmed MIXING DYNAMICS OF STRATIFIED VORTEX PAST TILTED PIPELINE
title_sort mixing dynamics of stratified vortex past tilted pipeline
publisher IRC
publishDate 2017
url http://utpedia.utp.edu.my/17962/1/SHU-SHIK-YUAN_18323_Dissertation.pdf
http://utpedia.utp.edu.my/17962/
_version_ 1741195273444524032
score 11.62408

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