Journal article
Application of a 2D harmonic polynomial cell (HPC) method to singular flows and lifting problems
Centre for Autonomous Marine Operations and Systems (AMOS), Department of Marine Technology, NTNU, NO-7491 Trondheim, Norway1
School of Naval Architecture Engineering, State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, People's Republic of China2
Sevan Marine ASA, 0277 Oslo, Norway3
Further developments and applications of the 2D harmonic polynomial cell (HPC) method proposed by Shao and Faltinsen [22] are presented. First, a local potential flow solution coupled with the HPC method and based on the domain decomposition strategy is proposed to cope with singular potential flow characteristics at sharp corners fully submerged in a fluid.
The results are verified by comparing them with the analytical added mass of a double-wedge in infinite fluid. The effect of the singular potential flow is not dominant for added mass and damping, but the error is non-negligible when calculating mean wave loads using direct pressure integration. Then, the double-layer nodes technique is used to simulate a thin free shear layer shed from lifting bodies, across which the velocity potential is discontinuous.
The results are verified by comparing them with analytical results for steady and unsteady lifting problems of a flat plate in infinite fluid. The latter includes the Wagner problem and the Theodorsen functions. Satisfactory agreement with other numerical results is documented for steady linear flow past a foil and beneath the free surface.
Language: | English |
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Year: | 2015 |
Pages: | 75-90 |
ISSN: | 18791549 and 01411187 |
Types: | Journal article |
DOI: | 10.1016/j.apor.2015.07.011 |