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Author Ghadimi, Parviz
Affiliation Amirkabir University of Technology, Department of Maritime Engineering 424 Hafez Ave, Tehran, Iran
E-mail pghadimi@aut.ac.ir
Author Nazemian, Amin
Affiliation Amirkabir University of Technology, Department of Maritime Engineering 424 Hafez Ave, Tehran, Iran
E-mail anazemian@aut.ac.ir
Author Karam, Saeid
Affiliation Malek Ashtar University, Department of Maritime Engineering Tehran, Iran
E-mail s_karami_mut_ac@dr.com
ISSN printed 1733-8670
URI http://repository.scientific-journals.eu/handle/123456789/2657
Abstract The hydrodynamic performance of trimaran hulls has been previously investigated for optimum performance in calm water, but there is still a limited understanding of its motion response; therefore, a CFD-based numerical approach was developed and applied on a trimaran hull in the presence of regular and irregular waves. To validate the CFD method, a comparison was conducted using both experimental and 3D panel method data. In this study, two different turbulence models were surveyed, and the SST Menter k-Omega (k-ω) turbulence model was shown to be a more accurate model than the realizable k-Epsilon (k-ε) model. The different features of the proposed numerical model include the implementation of an overset mesh method, unique mesh plan refinement, and wave-damping region. The discrepancy between the experimental data and the results of other seakeeping calculation methods have always been problematic, especially for low-speed strip theory and 3D panel methods, but good consistency was observed between the proposed CFD model and experimental data. Unlike potential-based or conformal mapping seakeeping analysis methods, the effect of nonlinear waves, hull shape above the waterline, and other ship dynamic phenomena were considered in this CFD application. The proposed CFD method reduces the simulation time and computational efforts for ship motion calculations.
Publisher Scientific Journals Maritime University of Szczecin, Zeszyty Naukowe Akademia Morska w Szczecinie
Keywords trimaran
Keywords hydrodynamic performance
Keywords seakeeping
Keywords overset mesh
Keywords numerical simulation
Title Numerical simulation of the seakeeping of a military trimaran hull by a novel overset mesh method in regular and irregular waves
Type Original scientific article
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ISSN on-line 2392-0378
Language English
Funding No data
Figures 18
Tables 2
DOI 10.17402/459
Published 2021-03-31
Accepted 2021-02-18
Recieved 2020-10-13

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