|Table of Contents|

Citation:
　Fatemeh Namazi-saleh,Velluruzhathil John Kurian,Zahiraniza Mustaffa,et al.Effect of Bed Vicinity on Vortex Shedding and Force Coefficients of Fluid Flow on an Offshore Pipeline[J].Journal of Marine Science and Application,2017,(1):81-86.[doi:10.1007/s11804-017-1393-y]
Click and Copy

Effect of Bed Vicinity on Vortex Shedding and Force Coefficients of Fluid Flow on an Offshore Pipeline

Info

Title:
Effect of Bed Vicinity on Vortex Shedding and Force Coefficients of Fluid Flow on an Offshore Pipeline
Author(s):
Fatemeh Namazi-saleh1;  Velluruzhathil John Kurian1;  Zahiraniza Mustaffa1;  Mohammadreza Tahan2;  Dokyun Kim1
Affilations:
Author(s):
Fatemeh Namazi-saleh1;  Velluruzhathil John Kurian1;  Zahiraniza Mustaffa1;  Mohammadreza Tahan2;  Dokyun Kim1
1. Department of Civil and Environmental Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 32610, Perak Darul Ridzuan, Malaysia;
2. Department of Mechanical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 32610, Perak Darul Ridzuan, Malaysia
Keywords:
Navier-Stokes equations; artificial compressibility method; dual time stepping; gap ratio; flat seabed; offshore pipelines; vortex shedding
分类号:
-
DOI:
10.1007/s11804-017-1393-y
Abstract:
The effect of rigid bed proximity on flow parameters and hydrodynamic loads in offshore pipelines exposed to turbulent flow is investigated numerically. The Galerkin finite volume method is employed to solve the unsteady incompressible 2D Navier-Stokes equations. The large eddy simulation turbulence model is solved using the artificial compressibility method and dual time-stepping approach. The proposed algorithm is developed for a wide range of turbulent flows with Reynolds numbers of 9500 to 1.5×104. Evaluation of the developed numerical model shows that the proposed technique is capable of properly predicting hydrodynamic forces and simulating the flow pattern. The obtained results show that the lift and drag coefficients are strongly affected by the gap ratio. The mean drag coefficient slightly increases as the gap ratio increases, although the mean lift coefficient rapidly decreases. The vortex shedding suppression happen at the gap ratio of less than 0.2.

References:

Ai Y, Feng D, Ye H, Li L, 2013. Unsteady numerical simulation of flow around 2-D circular cylinder for high Reynolds numbers. Journal of Marine Science and Application, 12(2), 180-184.
DOI:10.1007/s11804-013-1183-0
Bearman P, Zdravkovich M, 1978. Flow around a circular cylinder near a plane boundary. Journal of Fluid Mechanics, 89(1), 33-47.
DOI:http://dx.doi.org/10.1017/S002211207800244X
Buresti G, Launaro F, 1980. Pressure measurements around a circular cylinder in cross flow near a plane boundary. University of Pisa, Institute of Aerodynamics, 1-101.
Chorin AJ, 1967. A numerical method for solving incompressible viscous flow problems. Journal of Computational Physics, 2(1), 12-26.
DOI:10.1016/0021-9991(67)90037-X
Gao FP, Yang B, Wu YX, Yan SM, 2006. Steady current induced seabed scour around a vibrating pipeline. Applied Ocean Research, 28(5), 291-298.
DOI:http://dx.doi.org/10.1016/j.apor.2007.01.004
Jensen B, Sumer B, Jensen H, Fredsoe J, 1990. Flow around and forces on a pipeline near a scoured bed in steady current. Journal of Offshore Mechanics and Arctic Engineering, 112(3), 206-213.
DOI:10.1115/1.2919858
Kazeminezhad M, Yeganeh-Bakhtiary A, Etemad-Shahidi A, 2010. Numerical investigation of boundary layer effects on vortex shedding frequency and forces acting upon marine pipeline. Applied Ocean Research, 32(4), 460-470.
DOI:http://dx.doi.org/10.1016/j.apor.2010.10.002
Kiya M, 1968. Study on the turbulent shear flow past a circular cylinder. Bulletin of the Faculty of Engineering, Hokkaido University, 50, 1-101.
Lee YG, Hong SW, Kang KJ, 1994. A numerical simulation of vortex motion behind a circular cylinder above a horizontal plane boundary. The Fourth International Offshore and Polar Engineering Conference, Osaka, Japan, 428-433.
Lei C, Cheng L, Armfield S, Kavanagh K, 2000. Vortex shedding suppression for flow over a circular cylinder near a plane boundary. Ocean Engineering, 27(10), 1109-1127.
DOI:http://dx.doi.org/10.1016/S0029-8018(99)00033-5
Li Y, Chen B, Lai G, 1997. The numerical simulation of wave forces on seabed pipeline by three-step finite element method and large eddy simulation. The Seventh International Offshore and Polar Engineering Conference, Honolulu, USA, 273-277.
Liang D, Cheng L, 2005. Numerical modeling of flow and scour below a pipeline in currents:Part I. Flow simulation. Coastal Engineering, 52(1), 25-42.
DOI:http://dx.doi.org/10.1016/j.coastaleng.2004.09.002
Namazi-Saleh F, John KV, Mustaffa ZB, 2016. Numerical evaluation of galerkin finite volume solver for laminar/turbulent flow over flat plate. ARPN Journal of Engineering and Applied Sciences, 11(4), 2393-2399.
Namazi-Saleh F, Kurian JV, Zahiraniza MB, 2014. Investigation of vortex induced vibration of offshore pipelines near seabed. Applied Mechanics and Materials, 567, 265-270.
DOI:10.4028/www.scientific.net/AMM.567.265
Oner AA, Kirkgoz MS, Akoz MS, 2008. Interaction of a current with a circular cylinder near a rigid bed. Ocean Engineering, 35(14), 1492-1504.
DOI:http://dx.doi.org/10.1016/j.oceaneng.2008.06.005
Ong MC, Utnes T, Holmedal LE, Myrhaug D, Pettersen B, 2010. Numerical simulation of flow around a circular cylinder close to a flat seabed at high Reynolds numbers using a k-ε model. Coastal Engineering, 57(10), 931-947.
DOI:http://dx.doi.org/10.1016/j.coastaleng.2010.05.008
Roshko A, Steinolfson A, Chattoorgoon V, 1975. Flow forces on a cylinder near a wall or near another cylinder. DTIC Document.
Sabbagh-Yazd R, Mastorakis N, Meysami F, Namazi-Saleh F, 2008. 2D Galerkin finite volume solution of steady inviscid/viscous/turbulent artificial compressible flow on triangular meshes. International Journal of Computers, 2(1), 39-46.
Sohankar A, 2008. Large eddy simulation of flow past rectangular-section cylinders:Side ratio effects. Journal of Wind Engineering and Industrial Aerodynamics, 96(5), 640-655.
DOI:http://dx.doi.org/10.1016/j.jweia.2008.02.009
Zhao X, Zhang S, Meganathan A, 2009. Implicit time accurate method for unsteady computations. 47th Aerospace Sciences Meeting and Exhibit, Orlando, AIAA 2009-2166.
DOI:http://dx.doi.org/10.2514/6.2009-166

Memo

Memo:
Received date:2016-05-09;Accepted date:2016-09-21。
Foundation item:Supported by the Technology Innovation Program (Grant number:10053121) funded by the Ministry of Trade, Industry & Energy (MI, Korea) and by the Energy Efficiency & Resource of Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Ministry of Knowledge Economy of Korea (Grant number:2014301002-1870).
Corresponding author:Fatemeh Namazi-saleh,Email:fa_namazi@yahoo.com
Last Update: 2017-03-25