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Numerical investigation on incompressible cavity flows with turbulent incoming flow based on a wall-modeled RANS/LES method
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Lin-xin LAN1, Pan-pan HAN1, Meng JI1, Yun-xiang YOU1, 2, Xiao-ping QIU3, Qiao MA3, Kai-jian WU3
Journal of Ship Mechanics | 2026, 30(2) : 218 - 234
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Journal of Ship Mechanics | 2026, 30(2): 218-234
• Hydrodynamics •
Numerical investigation on incompressible cavity flows with turbulent incoming flow based on a wall-modeled RANS/LES method
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Lin-xin LAN1, Pan-pan HAN1, Meng JI1, Yun-xiang YOU1, 2, Xiao-ping QIU3, Qiao MA3, Kai-jian WU3
Affiliations
  • 1.State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  • 2.Yazhou Bay Institute of Deepsea Sci-tech, Shanghai Jiao Tong University, Sanya 572000, China
  • 3.Shanghai Junyu Information Technology Limited Co., Shanghai 200240, China
Published: 2026-02-15 doi: 10.3969/j.issn.1007-7294.2026.02.004
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Cavity flows are common phenomena for underwater vehicles. For example the drain holes of the submarine are one of the typical cavity flows. There are some complex turbulent phenomena in the cavity, such as shear layer K-H instability, coupling between shear layer and cavity recirculation. So far, many difficulties remain for CFD numerical simulation. Firstly, the setup of an accurate inflow condition is crucial for analyzing turbulent coherent structures inside the cavity with the high fidelity due to the fact that the flow upstream of the cavity is usually in an utterly turbulent state. Secondly, there are frequency components with second-order oscillation modes besides the ones with first-order oscillation modes in the cavity flow. However, the CFD numerical simulation still faces challenges for such second-order oscillation flows. In this paper, a DFSEM-WMHRL method is developed to perform high fidelity CFD simulation for such complex cavity flows, where the WMHRL is a hybrid RANS/LES method with the wall-modelled capability, and the DFSEM is a divergence free synthetic eddy method with the turbulent inlet generation capability. Through a series of numerical simulations on the channel flow with $ {Re}_{\tau }=395 $, the turbulence kinetic energy resolution index rk and the combined conditions for the RANS/LES hybrid boundary positions are firstly confirmed, indicating the capability of the proposed method for analyzing the second-order statistics of the channel flow with high fidelity. Moreover, numerical simulations were carried out for the cavity flow with $ {Re}_{{\mathrm{D}}}=3360 $ and $ L/D=2 $ based on the proposed method. The results show that the DFSEM-WMHRL method can accurately analyze both second-order statistical characteristics and the fine spectral structures caused by self-sustaining oscillations in the cavity flow.

cavity flows  /  turbulent inlet  /  coherent structures  /  self-sustained oscillation frequencies  /  wall-modeled LES simulation
Lin-xin LAN, Pan-pan HAN, Meng JI, Yun-xiang YOU, Xiao-ping QIU, Qiao MA, Kai-jian WU. Numerical investigation on incompressible cavity flows with turbulent incoming flow based on a wall-modeled RANS/LES method[J]. Journal of Ship Mechanics, 2026 , 30 (2) : 218 -234 . DOI: 10.3969/j.issn.1007-7294.2026.02.004
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Year 2026 volume 30 Issue 2
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Article Info
doi: 10.3969/j.issn.1007-7294.2026.02.004
  • Receive Date：2024-12-17
  • Online Date：2026-07-07
  • Published：2026-02-15
Article Data
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History
  • Received：2024-12-17
Affiliations
    1.State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
    2.Yazhou Bay Institute of Deepsea Sci-tech, Shanghai Jiao Tong University, Sanya 572000, China
    3.Shanghai Junyu Information Technology Limited Co., Shanghai 200240, China
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