Boundary element method (BEM) potential-flow solvers are regularly used in industrial applications due to their quick setup and computational time. In aerodynamics, vortex particle methods (VPM) are widely used with BEM potential-flow solvers for modeling lift. However, they are seldom applied to the ocean environment. This paper discusses the implementation of a VPM into Aegir, an existing time-domain, seakeeping, medium-fidelity, BEM potential-flow solver. The wake in the VPM is modeled using both a small dipole buffer wake sheet and vortex particles. It has been observed that this method captures both the details of complex wake patterns behind lift-producing surfaces and the expected lift force, thus improving the accuracy of the solution. Two new contributions presented in this paper include the extension of the VPM from previous source-based methods to a potential formulation and full interaction with free surface waves.
Time Domain Simulation of Lifting Bodies Acting at or Near the Free Surface With Vortex Particle Wakes
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received February 14, 2018; final manuscript received November 27, 2018; published online January 14, 2019. Assoc. Editor: Olivier Coutier-Delgosha.
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Gouveia, R., Fitzpatrick, S., Costa, A., and Kring, D. (January 14, 2019). "Time Domain Simulation of Lifting Bodies Acting at or Near the Free Surface With Vortex Particle Wakes." ASME. J. Fluids Eng. April 2019; 141(4): 041201. https://doi.org/10.1115/1.4042147
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