DOI QR코드

DOI QR Code

Large Eddy Simulation of Free Motion of Marine Riser using OpenFOAM

오픈폼을 활용한 자유진동하는 라이저 주위 유동의 LES 해석

  • Jung, Jae-Hwan (Korea Research Institute of Ship & Ocean Engineering Co. Ltd.) ;
  • Jeong, Kwang-Leol (NEXTfoam Co. Ltd., Research Center) ;
  • Gill, Jae-Heung (NEXTfoam Co. Ltd., Research Center) ;
  • Jung, Dongho (Korea Research Institute of Ship & Ocean Engineering Co. Ltd.)
  • 정재환 (선박해양플랜트연구소 해양플랜트에너지연구본부) ;
  • 정광열 ((주)넥스트폼 기술연구소) ;
  • 길재흥 ((주)넥스트폼 기술연구소) ;
  • 정동호 (선박해양플랜트연구소 해양플랜트에너지연구본부)
  • Received : 2019.08.16
  • Accepted : 2019.10.16
  • Published : 2019.10.31

Abstract

In this study, the free motion of a riser due to vortex shedding was numerically simulated with Large Eddy Simulation (LES) and Detached Eddy Simulation (DES) turbulence models. A numerical simulation program was developed by applying the Rhie-Chow interpolation method to the pressure correction of the OpenFOAM standard solver pimpleDyMFoam. To verify the developed program, the vortex shedding around the fixed riser at Re = 3900 was calculated, and the results were compared with the existing experimental and numerical data. Moreover, the vortex-induced vibration of a riser supported by a linear spring was numerically simulated while varying the spring constant. The results are compared with published direct numerical simulation (DNS) results. The present calculation results show that the numerical method is appropriate for simulating the vortex-induced motion of a riser, including lock-in phenomena.

Keywords

Riser motion;Large eddy simulation LES;Detached eddy simulation DES;OpenFOAM;Vortex induced vibration;Lock-in;Reduced velocity;Rhie-Chow interpolation

Acknowledgement

Grant : 초심해역용 라이저(SLWR) 설계엔지니어링 핵심기술 개발

Supported by : 선박해양플랜트연구소