Application of IITM-RANS3D to free-fall water entry of prismatic and non-prismatic finite wedges
作者机构：Center for Maritime Experiments to Maritime Experience(ME2ME)Indian Institute of Technology MadrasChennaiIndia Department of Ocean EngineeringIndian Institute of Technology MadrasChennaiIndia
出 版 物：《水动力学研究与进展B辑:英文版》 (Journal of Hydrodynamics)
年 卷 期：2023年第35卷第3期
页 面：417-430页
核心收录：
学科分类：0707[理学-海洋科学] 080103[工学-流体力学] 08[工学] 080104[工学-工程力学] 081502[工学-水力学及河流动力学] 0815[工学-水利工程] 0824[工学-船舶与海洋工程] 0701[理学-数学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 0801[工学-力学（可授工学、理学学位）]
基 金：supported by the Naval Research Board(NRB)of DRDO Ministry of Defence Government of India under the project"Application of IITM-RANS3D to shipslamming and motion responses"(Grant No.NRB-498/HYD/22-25)
主 题：Wedge water entry slamming fast-fictitious-domain IITM-RANS3D experiments
摘 要：High-speed watercraft and ships undergo coupled motions which make the front portion of the hull exit and violently re-enter *** induces short-term slamming loads that may compromise the structural integrity of the *** slamming of the bow can be modeled as straight wedges of different deadrise angles(DRAs)falling into water from different *** advent of computational fluid dynamics has allowed the problem of wedge-slamming to be simulated using the full Navier-Stokes equations thus complementing the pioneering studies based on ***,most researchers are opting to use commercial software to simulate the wedge-impact problem as it allows access to overset meshing algorithms which are robust in modeling the wedge as a moving *** boundary methods(EBMs)offer some advantages over overset meshing in that the mesh only needs to be generated once and Cartesian mesh-based solvers can be ***,the application of EBMs to wedge-impact has been limited in the literature and merits further *** this context,we investigate the applicability of the fast-fictitious-domain(FFD)based embedded boundary treatment to simulate the violent water-entry of *** extend our in-house Navier-Stokes model IITM-RANS3D to handle floating bodies through integration of a rigid-body dynamics solver and an algorithm to embed three-dimensional stereolithography(STL)geometries as solids over a Cartesian *** proposed algorithm is extensively benchmarked against variable DRA wedge-slamming experiments reported in the literature as well as constant DRA wedge-slamming experiments performed *** good agreement is reported in terms of the time-history of hydrodynamic impact pressures measured at various locations on the hull as well as the wedge motion responses thus demonstrating the suitability of FFD for simulating the coupled hydrodynamics of slamming for simplified hull geometries.
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