Comparison of PANS and LES of the flow past a generic ship

OCEAN ENGINEERING

卷:165

Article

Zhang, Jie¹  Minelli, Guglielmo¹  Rao, Anirudh Narayan¹  Basara, Branislav²  Bensow, Rickard¹  Krajnovic, Sinisa¹ 

[1] Chalmers Univ Technol, Dept Mech & Maritime Sci, S-41296 Gothenburg, Sweden

[2] AVL List GmbH, Adv Simulat Technol, Hans List Pl 1, A-8020 Graz, Austria

关键词: PANS;    LES;    Generic ship;    Bi-stability;    Separated flows;   

DOI  :  10.1016/j.oceaneng.2018.07.023

来源: Elsevier

【 摘 要 】

The prediction of flow past a generic ship has been performed using partially-averaged Navier Stokes (PANS) turbulence model. The Reynolds number based on the width of the ship is 8 x 10(4). A detailed comparison with resolved large-eddy simulation (LES) solution and available experimental data is made for a better understanding of the capability of PANS in predicting the turbulent flow in the wake. The results show that PANS produces similar trends to those predicted by LES. However, a coarse grid resolution will lead PANS to act as unsteady Reynolds-averaged Navier Stokes (URANS). Although the geometry is symmetric for the incoming flow at a zero yaw angle, bi-stable behaviour is observed in the wake, contributing to an asymmetric flow distribution on the heli-deck.

【 授权许可】

Free