오픈폼을 활용한 자유진동하는 라이저 주위 유동의 LES 해석

• Published in: Han-guk haeyang gonghak hoeji (Online) Vol. 33; no. 5; pp. 387 - 393
• Main Authors: 정재환(Jae-Hwan Jung), 정광열(Kwang-Leol Jeong), 길재흥(Jae-Heung Gill), 정동호(Dongho Jung)
• Format: Journal Article
• Language: Korean
• Published: 한국해양공학회 2019
• Subjects: 해양공학; Detached eddy simulation DES; Rhie-Chow interpolation; Riser motion 라이저 운동; Vortex induced vibration 와유기 진동; Large eddy simulation LES; OpenFOAM 오픈폼; Lock-in, Reduced velocity 감쇠속도
• ISSN: 1225-0767; 2287-6715
• DOI: 10.26748/KSOE.2019.074

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.