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

作     者：Fatemeh Namazi-saleh Velluruzhathil John Kurian Zahiraniza Mustaffa Mohammadreza Tahan Dokyun Kim 

作者机构：Department of Civil and Environmental Engineering Universiti Teknologi PETRONAS Bandar Seri Iskandar 32610 Perak Darul Ridzuan Malaysia Department of Mechanical Engineering Universiti Teknologi PETRONAS Bandar Seri Iskandar 32610 Perak Darul Ridzuan Malaysia 

出 版 物：《Journal of Marine Science and Application》 (船舶与海洋工程学报（英文版）)

年 卷 期：2017年第16卷第1期

页      面：81-86页

核心收录：

学科分类：0820[工学-石油与天然气工程] 080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 082002[工学-油气田开发工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Supported by the Technology Innovation Program(Grant number:10053121) funded by the Ministry of Trade,Industry&Energy(MI,Korea) 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) 

主　　题：Navier–Stokes equations artificial compressibility method dual time stepping gap ratio flat seabed offshore pipelines vortex shedding 

摘      要：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 1.5×10^*** 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.