Verification and validation of numerical modelling of DTMB 5415 roll decay

OCEAN ENGINEERING

卷:162

Article

Mancini, Simone¹  Begovic, Ermina¹  Day, Alexander H.²  Incecik, Atilla² 

[1] Univ Naples Federico II, Naples, Italy

[2] Univ Strathclyde, Glasgow, Lanark, Scotland

关键词: DTMB 5415 intact ship;    CFD;    EFD;    Roll decay;    Uncertainty analysis;    Verification and validation (V&V);   

DOI  :  10.1016/j.oceaneng.2018.05.031

来源: Elsevier

【 摘 要 】

The paper presents a numerical roll damping assessment of the intact DTMB 5415 naval ship at zero speed. Free model motions from four experimental roll decays with initial heeling angle of 4.0, 13.5, 19.58 and 24.50 deg, performed previously at the University of Strathclyde, Glasgow, have been analysed and the one with 19.58 deg initial heeling has been chosen for the Computational Fluid Dynamic (CFD) analysis. All calculations are performed using CD Adapco Star CCM + software investigating the accuracy and efficiency of the numerical approach for case of high initial heeling angle of bare hull. In the numerical procedure the verification analysis of mesh refinement and time step was performed with the aim to investigate the numerical error/uncertainty. For grid refinement and time step, validation and verification procedure has been performed according to the Grid Convergence Index (GCI) method. Moreover, to verify the main source of the modelling error/uncertainty, the effect of degrees of freedom are evaluated, comparing the numerical results with the experimental results. Conclusions are identifying best practice for roll decay simulations commenting the accuracy of numerical results and required calculation time.

【 授权许可】

Free