dc.contributor.author | Hanssen, Finn Christian W. | |
dc.contributor.author | Greco, Marilena | |
dc.contributor.author | Shao, Yanlin | |
dc.date.accessioned | 2017-12-07T07:04:36Z | |
dc.date.available | 2017-12-07T07:04:36Z | |
dc.date.created | 2015-12-16T16:25:28Z | |
dc.date.issued | 2015 | |
dc.identifier.isbn | 978-0-7918-5659-8 | |
dc.identifier.uri | http://hdl.handle.net/11250/2469451 | |
dc.description.abstract | In numerical simulations with moving bodies, and often with complex geometries, generation of high-quality body-fitted grids is a cumbersome and time-consuming task. An alternative is to use a fixed (Cartesian) background grid, and allow the body to move freely over this. The challenge in such methods is to transfer the body-boundary conditions of the moving body to fixed grid nodes in a rational manner. In this paper, an Immersed Boundary Method (IBM) is proposed to simulate potential flow about a moving body on a Cartesian background grid. The recently developed Harmonic Polynomial Method, proven both accurate and computationally efficient, is used to represent the velocity potential in the fluid. The body-boundary conditions are interpolated by using ghost nodes inside the body with mirror interpolation points in the fluid.
The method is first tested for a fixed cylinder in oscillatory flow to determine the accuracy of the proposed IBM, before considering the equivalent case of an oscillating cylinder in still fluid. Finally, a steadily-advancing cylinder is studied, which is considered as the most challenging case with respect to spurious pressure oscillations. These are known to be a challenge in many IBMs, and special attention is therefore devoted to this aspect. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | American Society of Mechanical Engineers (ASME) | nb_NO |
dc.relation.ispartof | Proceedings ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering Volume 11: Prof. Robert F. Beck Honoring Symposium on Marine Hydrodynamics | |
dc.title | The harmonic polynomial cell method for moving bodies immersed in a Cartesian background grid | nb_NO |
dc.type | Chapter | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | acceptedVersion | nb_NO |
dc.identifier.doi | 10.1115/OMAE2015-41282 | |
dc.identifier.cristin | 1301828 | |
dc.relation.project | Norges forskningsråd: 223254 | nb_NO |
dc.description.localcode | (c) 2015 by ASME | nb_NO |
cristin.unitcode | 194,64,20,0 | |
cristin.unitname | Institutt for marin teknikk | |
cristin.ispublished | true | |
cristin.fulltext | postprint | |
cristin.qualitycode | 1 | |