Isogeometric analysis with level set method for large-amplitude liquid sloshing

• Published in: Ocean engineering 2022-12, Vol.265, p.112613, Article 112613
• Main Authors: Yu, Jiarui, Yue, Baozeng, Ma, Bole
• Format: Article
• Language: English
• Subjects: Characteristic-based split; Isogeometric analysis; Large-amplitude sloshing; Level set; Two-phase flow
• ISSN: 0029-8018; 1873-5258
• DOI: 10.1016/j.oceaneng.2022.112613

Large-amplitude sloshing in partially filled tanks is an important topic in the field of ship dynamics research, which has a great impact on the stability of carrier ships. As the most intuitive method, the computational fluid dynamics method has been proposed to simulate large-amplitude liquid sloshing for decades. In this paper, isogeometric analysis is used to model and simulate the large-amplitude liquid sloshing in closed tanks, considering the motions of both liquid and gas. The characteristic-based split method is applied to decompose the Navier-Stokes equations into an explicit scheme to improve the calculation efficiency. The level set method is used to track the interface between gas and liquid, also known as the liquid free surface. A mass correction method is proposed to correct the volume errors caused by the level set method in tracking the liquid free surface. By comparing with the experimental, analytical and FLOW-3D software results, the effectiveness and accuracy of the proposed method is verified, and the mass correction method can significantly improve the stability of liquid sloshing and the accuracy of free liquid surface tracking. •Isogeometric Analysis for large-amplitude two-phase flow sloshing in closed tanks, loose initial pressure conditions.•Level set method for free surface tracking with original mass correction.•Characteristic-Based Split method for two-phase fluid, high efficiency.•Comparison with experimental, analytical and Flow3D results and liquid configuration display.