Development of an efficient two-phase 3D numerical wave flume
Grigoriadis, D. G. E.
PublisherSociety of Petroleum Engineers
SourceProceedings of the International Offshore and Polar Engineering Conference
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In the present study an efficient two-phase 3D numerical wave flume was developed, tested and validated. The most important advantage over conventional numerical wave flumes is the use of a constant coefficient Poisson equation for the pressure solution, which allows the use of fast direct solvers (FDS). The level set method (LSM) is used to track the interface, while the presence of submerged obstacles is taken into account using the immersed boundary method (IBM). The results show very good agreement with reference test cases, while the computational cost is significantly reduced. Using a direct solver in either variable or constant coefficient approaches, speed up factors of around 700 were achieved. According to the study of Dodd & Ferrante (2014), if an iterative solver is used for the variable coefficient approach, the speed-up factor is 10-40 and proportional to the convergence quality of the iterative solver. Copyright © 2017 by the International Society of Offshore and Polar Engineers (ISOPE).
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