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CFD simulation of motion responses of a trimaran in regular head waves


Nowruzi, L and Enshaei, H and Lavroff, J and Kianejad, SS and Davis, MR, CFD simulation of motion responses of a trimaran in regular head waves, Royal Institution of Naval Architects. Transactions. Part A. International Journal of Maritime Engineering, 162, (Part A1) pp. 91-106. ISSN 1479-8751 (2020) [Refereed Article]

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© 2020 The Royal Institution of Naval Architects

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CFD has proved to be an effective method in solving unsteady Reynolds–Averaged Navier-Stokes (RANS) equations for analysing ships in free surface viscous flow. The research reported in this paper is intended to develop a better understanding of the parameters influencing high-speed trimaran motions responses. Gridding system, time step and reliability analysis were performed in solving RANS equations. Different turbulence models were investigated, and the SST Menter K Omega turbulence model proved a more accurate model than Realizable K-epsilon model. In order to validate the CFD method, the results of the motions response of a highspeed trimaran are compared against a set of experimental and numerical results from a 1.6 m trimaran model tested in various head seas conditions. The results suggest that CFD offers a reliable method for predicting pitch and heave motions of trimarans in regular head waves when compared to traditional Strip Theory methods. Unlike strip theory, the effect of breaking waves, hull shape above waterline and green seas are considered in CFD application. A wave resonance phenomenon was observed and Wave deformation as a result of wave-current-wind interaction in CFD was identified as the main source of discrepancy. The results from this work form the basis for future analysis of trimaran motions in oblique seas for developing a better understanding of the parameters influencing the seakeeping response, as well as passenger comfort.

Item Details

Item Type:Refereed Article
Keywords:trimaran, motion response, CFD simulations, regular waves
Research Division:Engineering
Research Group:Maritime engineering
Research Field:Naval architecture
Objective Division:Transport
Objective Group:Water transport
Objective Field:Domestic passenger water transport (e.g. ferries)
UTAS Author:Nowruzi, L (Dr Leo Nowruzi)
UTAS Author:Enshaei, H (Dr Hossein Enshaei)
UTAS Author:Lavroff, J (Dr Jason Ali-Lavroff)
UTAS Author:Kianejad, SS (Mr Seyedsadreddin Kianejadtejenaki)
UTAS Author:Davis, MR (Professor Michael Davis)
ID Code:136932
Year Published:2020 (online first 2019)
Deposited By:Seafaring and Maritime Operations
Deposited On:2020-01-22
Last Modified:2020-10-12
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