Abstract
The roll motions are influenced by significant viscous effects such as the flow separation. The 3D simulations of free decay roll motions for the ship model DTMB 5512 are carried out by Reynold averaged Navier-Stokes (RANS) method based on the dynamic mesh technique. A new moving mesh technique is adopted and discussed in details for the present simulations. The purpose of the research is to obtain accurate numerical prediction for roll motions with their respective numerical/modeling errors and uncertainties. Errors and uncertainties are estimated by performing the modern verification and validation (V&V) procedures. Simulation results for the free-floating surface combatant are used to calculate the linear, nonlinear damping coefficients and resonant frequencies including a wide range of forward speed. The present work can provide a useful reference to calculate roll damping by computational fluid dynamics (CFD) method and simulate a general ship motions in waves.
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Foundation item: the National Natural Science Foundation of China (No. 51579147)
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Zhu, Rc., Yang, Cl., Miao, Gp. et al. Computational fluid dynamics uncertainty analysis for simulations of roll motions for a 3D ship. J. Shanghai Jiaotong Univ. (Sci.) 20, 591–599 (2015). https://doi.org/10.1007/s12204-015-1666-z
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DOI: https://doi.org/10.1007/s12204-015-1666-z
Keywords
- Reynold averaged Navier-Stokes (RANS) method
- free decay
- forced roll
- computational fluid dynamics uncertainty