Numerical Simulations of Viscous Flow around Multi-Hull Ship by Overset Grid Techniques
Since multi-hull ship has good resistance and seakeeping performances in sea waves as well as a bigger deck area compared with the ordinary mono-hull ship, it has been applied not only for civil use but also for military.In present work, numerical simulation of viscous flows around two common types, catamaran and trimaran, based on RANS method coupled with overset grid technique and level set method, is presented.The free-surface is taken into account and treated by level-set method.Overset grid technique is employed to embed the body-fit hull grids into an orthogonal background grid.The distance gap between ship hulls can be adjusted easily by the overset grid technique without regenerating the mesh, such that the optimal distance gap between ship hulls can be figured out.And for each distance gap, a serial of calculation with different Froude numbers is carried out to predict the resistance characteristics and find out the optimal distance gap and ship hull layout.Analysis also includes the complex wave patterns produced by the multi-hull ship.
Catamaran trimaran overset grid Level-set resistance
Shen Zhirong Ma Juan Wan Decheng
State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering,Shanghai Jiao Tong University, Shanghai 200240
国内会议
太原
英文
185-191
2011-08-03（万方平台首次上网日期，不代表论文的发表时间）