Computational Fluid Dynamics Uncertainty Analysis for Simulations of Roll Motions for a 3D Ship

doi:10.1007/s12204-015-1666-z

Abstract

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.

Key words: Reynold averaged Navier-Stokes (RANS) method| free decay, forced roll| computational fluid dynamics uncertainty

摘要： 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.

关键词: Reynold averaged Navier-Stokes (RANS) method| free decay, forced roll| computational fluid dynamics uncertainty

CLC Number:

U 661

ZHU Ren-chuan1 (朱仁传), YANG Chun-lei1,2* (杨春蕾), MIAO Guo-ping1 (缪国平), FAN Ju1 (范菊). Computational Fluid Dynamics Uncertainty Analysis for Simulations of Roll Motions for a 3D Ship[J]. Journal of shanghai Jiaotong University (Science), 2015, 20(5): 591-599.

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