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Computational Fluid Dynamics Evaluation of Vortex-Induced Vibrations in Single and Multiple Cylinders for Offshore Design

نوع مقاله : علمی - پژوهشی

نویسندگان
سید رضا سمائی 1
محمد اسدیان قهفرخی 2
1 Assistant professor, Department of Civil Engineering, SR.C., Islamic Azad University, Tehran, Iran;
2 Assistant Professor, Department of Civil Engineering, SR. C., Islamic Azad University, Tehran, Iran
10.22065/jsce.2025.506520.3660
چکیده
The interaction of fluid flow with cylindrical bodies is closely associated with drag, lift, and vortex-induced vibrations (VIV), all of which can significantly affect structural performance and fatigue life. This study examines the dynamic response of solid cylinders subjected to VIV using computational fluid dynamics (CFD). Numerical simulations were conducted in ANSYS Fluent with an inlet velocity of 10 m/s applied to five turbine-base-like columns arranged in multiple configurations. A structured grid consisting of 63,699 cells was generated, with a mesh quality index of approximately 0.8. Mesh sensitivity analysis and mass conservation checks confirmed third-order accuracy, validating the reliability of the computational model. Flow field visualization revealed strong velocity deflections around the cylinders, with localized peaks reaching 22.4 m/s, in agreement with Bernoulli’s principle. Pressure contour results indicated fluctuations between 48.9 and 3.98 kPa, which contributed to vortex shedding and oscillatory forces acting on the structures. The analysis demonstrated that oscillation patterns are highly sensitive to the arrangement of cylinders, influencing the level of fatigue accumulation and overall structural stability. These outcomes highlight the critical role of cylinder configuration in mitigating vibration effects and improving performance under fluid loading. The findings are directly applicable to the design of offshore wind turbine foundations, marine risers, and energy harvesting devices, where control of fluid-induced vibrations is essential to ensure durability and resilience. This work contributes to advancing the understanding of VIV in multi-cylinder systems and provides guidance for optimizing configurations in offshore and energy-related applications.
کلیدواژه‌ها
Cylindrical structures
Offshore energy systems
Computational fluid dynamics
Numerical simulation
Vortex-induced vibrations

موضوعات

عنوان مقاله English

Computational Fluid Dynamics Evaluation of Vortex-Induced Vibrations in Single and Multiple Cylinders for Offshore Design

نویسندگان English

Seyed Reza Samaei 1
mohammad Asadian ghahferokhi 2
1 Assistant professor, Department of Civil Engineering, SR.C., Islamic Azad University, Tehran, Iran;
2 Assistant Professor, Department of Civil Engineering, SR. C., Islamic Azad University, Tehran, Iran
چکیده English

The interaction of fluid flow with cylindrical bodies is closely associated with drag, lift, and vortex-induced vibrations (VIV), all of which can significantly affect structural performance and fatigue life. This study examines the dynamic response of solid cylinders subjected to VIV using computational fluid dynamics (CFD). Numerical simulations were conducted in ANSYS Fluent with an inlet velocity of 10 m/s applied to five turbine-base-like columns arranged in multiple configurations. A structured grid consisting of 63,699 cells was generated, with a mesh quality index of approximately 0.8. Mesh sensitivity analysis and mass conservation checks confirmed third-order accuracy, validating the reliability of the computational model. Flow field visualization revealed strong velocity deflections around the cylinders, with localized peaks reaching 22.4 m/s, in agreement with Bernoulli’s principle. Pressure contour results indicated fluctuations between 48.9 and 3.98 kPa, which contributed to vortex shedding and oscillatory forces acting on the structures. The analysis demonstrated that oscillation patterns are highly sensitive to the arrangement of cylinders, influencing the level of fatigue accumulation and overall structural stability. These outcomes highlight the critical role of cylinder configuration in mitigating vibration effects and improving performance under fluid loading. The findings are directly applicable to the design of offshore wind turbine foundations, marine risers, and energy harvesting devices, where control of fluid-induced vibrations is essential to ensure durability and resilience. This work contributes to advancing the understanding of VIV in multi-cylinder systems and provides guidance for optimizing configurations in offshore and energy-related applications.

کلیدواژه‌ها English

Cylindrical structures
Offshore energy systems
Computational fluid dynamics
Numerical simulation
Vortex-induced vibrations
  1. Tabrizizadeh, R. (1396). Laboratory Study on the Influence of Cross-Sectional Area and Shape of Risers on Vortex-Induced Vibration Phenomenon Response (Master's thesis). Islamic Azad University, Science and Research Branch, Tehran.
  2. Wikipedia contributors. (n.d.). Wind turbine. In Wikipedia, The Free Encyclopedia. Retrieved from https://en.wikipedia.org/wiki/Wind_turbine
  3. Mahboubi, M., Shafiei, H., & Mozaheri, H. (1396, April). Evaluation of Structural Analysis Methods under Wind Loads in Tall Structures. Paper presented at the Third Annual Conference of Architectural, Urban Planning, and Urban Management Research, Shiraz.
  4. Stathopoulos, T., & Blocken, B. (2016). Pedestrian wind environment around tall buildings. In Y. Tamura & R. Yoshie (Eds.), Advanced Environmental Wind Engineering (pp. xxx-xxx). Tokyo: Springer.
  5. Moradi, M., Saadat-Abadi, A. R., Fattahi, E., & Rahimzadeh, F. (1397, Summer). Assessment of Annual Wind Speed Homogeneity at Iranian Meteorological Stations (1981-2015). Journal of Meteorology and Atmospheric Sciences, 1(2), 146-162.
  1. Karadag, I., & Yuksek, I. (2020). Turkey Wind Turbine Integration to Tall Buildings (Doctoral dissertation). Manisa Celal Bayar University, Manisa. http://dx.doi.org/10.5772/intechopen.91650
  2. Andikaizadeh, K., Asadi-Jahanaabad, S., Norouzi, S., & Afifi, M. (1393). The Effect of Wind Speed on the Achievable Power from Wind Turbines. Paper presented at the Sixth Specialized Scientific Conference on Renewable, Clean, and Efficient Energy, Iran.
  3. Kumar, P., & Singh, S. K. (2020). Flow past a bluff body subjected to lower subcritical Reynolds number. Journal of Ocean Engineering and Science, 5(2), 173–179. https://doi.org/10.1016/j.joes.2019.10.002
  4. Fu, B., & Wan, D. (2017). Numerical study of vibrations of a vertical tension riser excited at the top end. Journal of Ocean Engineering and Science, 2(4), 268–278. https://doi.org/10.1016/j.joes.2017.09.001
  5. Muddada, S., Hariharan, K., Sanapala, V. S., & Patnaik, B. S. V. (2021). Circular cylinder wakes and their control under the influence of oscillatory flows: A numerical study. Journal of Ocean Engineering and Science, 6(4), 389–399. https://doi.org/10.1016/j.joes.2021.04.002
  1. Sumner, D. (2010). Two circular cylinders in cross-flow: A review. Journal of Fluids and Structures, 26(6), 849–899. https://doi.org/10.1016/j.jfluidstructs.2010.07.001
  2. Jafari, A. (1378). Design, Fabrication, and Testing of Electricity-Generating Wind Turbines (Master's thesis). Shiraz University, Department of Mechanical Engineering.
  3. Huera-Huarte, F. J., Bangash, Z. A., & González, L. M. (2016). Multi-mode vortex and wake-induced vibrations of a flexible cylinder in tandem arrangement. Journal of Fluids and Structures, 66, 571–588. https://doi.org/10.1016/j.jfluidstructs.2016.07.019
  4. Fan, X., Wang, Z., Wang, Y., & Tan, W. (2021). The effect of vortex structures on the flow-induced vibration of three flexible tandem cylinders. International Journal of Mechanical Sciences, 192, 106132. https://doi.org/10.1016/j.ijmecsci.2020.106132
  5. Bakhtiari, A., Zeinoddini, M., Ashrafipour, H., Tamimi, V., Harandi, M. M. A., & Jadidi, P. (2020). The effects of marine fouling on the wake-induced vibration of tandem circular cylinders. Ocean Engineering, 216, 108093. https://doi.org/10.1016/j.oceaneng.2020.108093
  6. Xu, W., Ma, Y., Cheng, A., & Yuan, H. (2018). Experimental investigation on multi-mode flow-induced vibrations of two long flexible cylinders in a tandem arrangement. International Journal of Mechanical Sciences, 135, 261–278. https://doi.org/10.1016/j.ijmecsci.2017.11.027
  7. Huang, S., & Sworn, A. (2013). Hydrodynamic coefficients of two fixed circular cylinders fitted with helical strakes at various staggered and tandem arrangements. Applied Ocean Research, 43, 21–26. https://doi.org/10.1016/j.apor.2013.06.001
  8. Lin, K., Fan, D., & Wang, J. (2020). Dynamic response and hydrodynamic coefficients of a cylinder oscillating in crossflow with an upstream wake interference. Ocean Engineering, 209, 107520. https://doi.org/10.1016/j.oceaneng.2020.107520
  9. Korkischko, I., & Meneghini, J. R. (2010). Experimental investigation of flow-induced vibration on isolated and tandem circular cylinders fitted with strakes. Journal of Fluids and Structures, 26(4), 611–625. https://doi.org/10.1016/j.jfluidstructs.2010.03.001
  10. Assi, G. R. S., Meneghini, J. R., Aranha, J. A. P., Bearman, P. W., & Casaprima, E. (2006). Experimental investigation of flow-induced vibration interference between two circular cylinders. Journal of Fluids and Structures, 22(6–7), 819–827. https://doi.org/10.1016/j.jfluidstructs.2006.04.013
  11. Evaluation of Wind Energy Potential and Feasibility Study of Wind Power Plant Construction in Sabzevar. Entezari, M. Studies of Geographic Areas of Dry Regions, Year 3, Numbers 9 and 10, Autumn and Winter 1391.
  12. Mani, A., & Hosseini Shamchi, A. (1389). Investigation of Wind Energy Potential in Stations of the South Ahar River Basin. Geographical Space Scientific Research Journal, 10(29), Spring.
  13. Broumand, M. (1380). Wind Energy Density. Neyvar Journal, Numbers 42 and 43.
  14. Jamil, M. (1375). Application of Wind Turbines in Germany. Iran Energy Journal, September.
  15. Jahangiri, et al. (1384). Calculation of Wind Energy Using Two-Parameter Weibull Distribution. Geographical Research Quarterly, 20th Year, Number 76.
  16. Renewable Energy Organization of Iran (SANAE). (1391). Retrieved from http://www.sana.ir
  17. Shamsabad, A. H. (1379). Investigation of Wind Energy Utilization in Various Climatic Conditions of Iran. Fourth National Conference on Rural and Efficient Energy, Chabahar.
  18. Azizi, M., & Jahangirian, A. (2020). Multi-Site Aerodynamic Optimization of Wind Turbine Blades for Maximum Annual Energy Production in East Iran. Energy Science & Engineering Journal, 8, 169–186. https://doi.org/10.1002/ese3.763.
  19. Ai, Q., Weaver, P. M., Barlas, T. K., Olsen, A. S., Madsen, H. A., & Andersen, T. L. (2019). Field testing of morphing flaps on a wind turbine blade using an outdoor rotating rig. Renewable Energy, 133, 53–65.
  20. McWilliam, K. M., Thanasis, K., Madsen, A. H., & Zahle, F. (2018). Aero-elastic wind turbine design with active flaps for AEP maximization. Wind Energy Science, 3(1), 231–241.
  21. Saenz-Aguirre, A., Fernandez-Resines, S., Aramendia, I., Fernandez-Gamiz, U., Zulueta, E., Lopez-Guede, J. M., & Sancho, J. (2018). 5 MW Wind Turbine Annual Energy Production Improvement by Flow Control Devices. Proceedings, 2(23), 1452.
  22. Zhang, Y., Ramdoss, V., Saleem, Z., Wang, X., Schepers, G., & Ferreira, C. (2019). Effects of root Gurney flaps on the aerodynamic performance of a horizontal axis wind turbine. Energy, 187.
  23. Branlard, E. (2020). Wind Turbine Aerodynamics and Vorticity-Based Methods. Springer.
  24. Nasir, H. F. (1398). What is a Wind Tunnel.
  25. Samaei, S. R., Ghodsi Hassanabad, M. (2021). Numerical and experimental investigation of damage in environmentally-sensitive civil structures using modal strain energy (case study: LPG wharf). International Journal of Environmental Science and Technology, 18, 1939–1952. https://doi.org/10.1007/s13762-021-03321-2
  26. Samaei, S. R., Azarsina, F., & Ghahferokhi, M. A. (2016). Numerical simulation of floating pontoon breakwater with ANSYS AQWA software and validation of the results with laboratory data. Bulletin de la Société Royale des Sciences de Liège, 85, 1487-1499.
  27. Samaei, S. R., & Ghodsi Hassanabad, M. (2022). Damage location and intensity detection in tripod jacket substructure of wind turbine using improved modal strain energy and genetic algorithm. Journal of Structural and Construction Engineering, 9(4), 182-202. https://doi.org/10.22065/jsce.2021.294103.2488
  28. Samaei, S. R., Ghodsi Hassanabad, M., Asadian Ghahfarrokhi, M., & Ketabdari, M. J. (2021). Numerical and experimental study to identify the location and severity of damage at the pier using the improved modal strain energy method-Case study: Pars Asaluyeh LPG export pier. Journal of Structural and Construction Engineering, 8(Special Issue 3), 162-179. https://doi.org/10.22065/jsce.2020.246425.2225
  29. Samaei, S. R., Ghodsi Hassanabad, M., Asadian Ghahfarrokhi, M., & Ketabdari, M. J. (2020). Structural health monitoring of offshore structures using a modified modal strain energy method (Case study: four-leg jacket substructure of an offshore wind turbine). Journal Of Marine Engineering, 16(32), 119-130.
  30. Samaei, S. R., Ghodsi Hassanabad, M., & Karimpor Zahraei, A. (2021). Identification of Location and Severity of Damages in the Offshore wind Turbine Tripod Platform by Improved Modal Strain Energy Method. Analysis of Structure and Earthquake, 18(3), 51-62.
  31. Samaei, S. R., Ghodsi Hassanabad, M., Asadian Ghahfarrokhi, M., & Ketabdari, M. J. (2021). Investigation of location and severity of damage in four-legged offshore wind turbine stencil infrastructure by improved modal strain energy method. Analysis of Structure and Earthquake, 17(3), 79-90.
  32. Samaei, S. R., Azarsina, F., & Ghahferokhi, M. A. (2016). Numerical simulation of floating pontoon breakwater with Ansys Aqua software and validation of results with laboratory data. The third national conference on recent innovations in civil engineering, architecture and urban planning.

  • تاریخ دریافت 20 اسفند 1403
  • تاریخ بازنگری 11 شهریور 1404
  • تاریخ پذیرش 15 شهریور 1404