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Author Parviz Ghadimi, Saeid Karami, Amin Nazemian
Affiliation Amirkabir University of Technology, Department of Maritime Engineering 424 Hafez Ave, Tehran, Iran
E-mail pghadimi@aut.ac.ir
Author ,
Affiliation Malek Ashtar University, Department of Maritime Engineering Tehran, Iran
E-mail ronghao1230@hotmail.com
Author ,
Affiliation Amirkabir University of Technology, Department of Maritime Engineering 424 Hafez Ave, Tehran, Iran
E-mail ronghao1230@hotmail.com
ISSN printed 1733-8670
URI https://repository.scientific-journals.eu/handle/123456789/2656
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
Keywords regular and irregular waves
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
References
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  10. Du, L., Hefazi, H. & Sahoo, P. (2019) Rapid resistance estimation method of non-Wigley trimarans. Ships and Offshore Structures 14(2), pp. 1–11.
ISSN on-line 2392-0378
Language English
Funding No data
Figures 18
Tables 2
Published 2021-03-15
Accepted 2021-02-18
Recieved 2020-10-13


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