**Publish at : ** 01 Jul 2015

**IJtech :** IJtech
Vol 6, No 3 (2015)

**DOI :** https://doi.org/10.14716/ijtech.v6i3.940

Samuel, Iqbal, M., Utama, I.K.A.P., 2015. An Investigation into the Resistance Components of Converting a Traditional Monohull Fishing Vessel into Catamaran Form. *International Journal of Technology*. Volume 6(3), pp. 432-441

134

Samuel | Department of Naval Architecture, Faculty of Engineering, University of Diponegoro, Semarang 50275, Indonesia |

M. Iqba | Department of Naval Architecture, Faculty of Engineering, University of Diponegoro, Semarang 50275, Indonesia |

I.K.A.P. Utama | Department of Naval Architecture and Shipbuilding Engineering, Faculty of Marine Technology, Institut Teknologi Sepuluh Nopember (ITS), Surabaya 60111, Indonesia |

Abstract

Resistance or drag is one of the most important factors in ship design, in particular in connection with the development of more efficient and environmentally friendly vessels. The shape of the hull under water will affect the fluid flow characteristics around the ship, hence causing the resistance to increase or decrease. If the resistance increases, the size of main engine and subsequently, the fuel consumption increases accordingly and this is not often anticipated by ship designers and operators. The use of a catamaran for passenger carriers is well known and its application for fishing vessels has received serious attention in the last few years, due to its advantages to produce wider deck area and smaller size of engine at the same displacement as the monohulls. The conversion of monohull fishing vessels in Cilacap the waters into a catamaran hull is an interesting topic in association with the development of better fishing vessels in this region. The resistance investigation of the conversion vessel was carried out by Computational Fluid Dynamics (CFD) approach and this is combined with classical slender body theory. In terms of mathematical calculation, the results between CFD and the combination of empirical formulas and slender body theory shows such a good agreement and the difference between the two is less than 5%. In terms of naval architecture, the results showed that the modification of a monohull vessel into a catamaran can increase the payload capacity up to two times. Conversely, this causes the resistance to increase about almost four times and this is certainly unpopular for the fishermen.

Catamaran, CFD, Monohull, Resistance, Slender body

References

Armstrong, T., 2003. The Effect of Demihull Separation on the Frictional Resistance of Catamarans. In: 7th International Conference on Fast and Sea Transportation. Ischia, Italy: FAST 2003

Bardina, J.E., Huang, P.G., Coakley, T.J., 1997. Turbulence Modeling Validation, Testing, and Development, NASA Technical Memorandum 110446. Moffett Field, California

Bhushan, S., et al., 2009. Model- and Full-scale URANS Simulations of Athena Resistance, Powering, Seakeeping, and 5415 Maneuvering. Journal of Ship Research, Volume 53(4), pp. 179–198

Broglia, R., Zaghi, S., Mascio, A.Di., 2009. Analysis of the Hydrodynamic Performances of High-speed Catamarans by Viscous Flow Solver. In: Isope. pp. 740–747

Broglia, R., Zaghi, S., Mascio, A.Di., 2011. Numerical Simulation of Interference Effects for a High-speed Catamaran. Journal of Marine Science and Technology, Volume 16(3), pp. 254–269

García, J., et al., 1998. A Stabilized Numerical Method for Analysis of Ship Hydrodynamics. In: Proceedings Eccomas Conference on CFD. Athens: John Willey

Gillmer, T., Johnson, B., 1982. Introduction to Naval Architecture, US Naval Institute, Annapolis, MD

Insel, M., Molland, A.F., 1992. An Investigation into the Resistance Components of High Speed Displacement Catamarans. Trans RINA, 134

Iqbal, M., Utama, I.K.A.., 2014. An Investigation into the Effect of Water Depth on the Resistance Components of Trimaran Configuration. In: Proceedings of the 9th International Conference on Marine Technology. Surabaya

ITTC, 2002. Report of the Resistance Committee. In: Proceedings of the 23rd International Towing Tank Conference. Venice, Italy: INSEAN

Jamaluddin, A., et al., 2012. Experimental and Numerical Study of the Resistance Component Interactions of Catamarans. In: Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment, Volume 227(1), pp. 51–60

Kleinstreuer, C., 1997. Engineering Fluid Dynamics, An Interdisciplinary Systems Approach, Cambridge, UK: Cambridge University Press

Menter, F.R., 1993. Zonal Two Equation k-? Turbulence Models for Flows. AIAA Journal, pp. 93–2906

Menter, F.R., 1994. Two-equation Eddy-Viscosity Turbulence Models for Engineering Applications. AIAA Journal, Volume 32(8), pp. 1598–1605

Millward, A., 1992. The Effect of Hull Separation and Restricted Water Depth on Catamaran Resistance. Transactions of Royal Institute of Naval Architects, pp. 341–349

Molland, A., et al., 2004. Resistance and Wash Measurements on a Series of High Speed Displacement Monohull and Catamaran Forms in Shallow Water. International Journal Maritime Engineering, Volume 146, p. 1938

Molland, A.F., 2008. A Guide to Ship Design, Construction and Operation, The Maritime Engineering Reference Book, Butterworth- Heinemann, Elsevier

Molland, A.F., Wellicome, J.F., Couser, P.R., 1996. Resistance Experiments on a Systematic Series of High-speed Displacement Catamaran Forms: Variations of Length-Displacement Ratio and Breadth-Draugh Ratio. Transaction RINA, 138A

Moraes, H.B., Vasconcellos, J.M., Latorre, R.G., 2004. Wave Resistance for High-speed Catamarans. Ocean Engineering, Volume 31(17-18), pp. 2253–2282

Muller-Graf, B., Radojcic, D., Simic, A., 2002. Resistance and Propulsion Characteristics of The VWS Hard Chine Catamaran Hull Series ’89. SNAME Transactions, 110

Paik, K.J., et al., 2009. Strongly Coupled Fluid-structure Interaction Method for Structural Loads on Surface Ships. Ocean Engineering, Volume 36(17-18), pp. 1346–1357

Sahoo, P.K., Salas, M., A, S., 2007. Practical Evaluation of Resistance of High-speed Catamaran Hull Forms – Part I. Ships and Offshore Structures, Volume 2(4), pp. 307–324

Seif, M.S., Amini, E., 2004. Performance Comparison Between Planing Monohull and Catamaran at High Froude Numbers. Iranian Journal of Science & Technology, Transaction B, 28(B4)

Setyawan, D., et al., 2010. Development of Catamaran Fishing Vessel. The Journal for Technology and Science, Volume 21(4), pp. 167-173

Stern, F., et al., 2008. Computational Hydrodynamic Tools for High-speed Sealift: Phase II Final Report, Available at: http://www.iihr.uiowa.edu/wp-content/uploads/2013/06/TR-465.pdf

Swennberg, S., 2000. A Test of Turbulence Models for Steady Flows around Ships. In: Workshop on Num. Ship Hydro. Gothenburg

Tdyn, 2014a. Tdyn Theory. In Barcelona, Spain

Tdyn, 2014b. Turbulence Handbook. In Barcelona, Spain, p. 139. Available at: http://www.compassis.com/downloads/Manuals/TdynTurbulenceHB.pdf

Tezdogan, T., et al., 2015. Full-scale Unsteady RANS CFD Simulations of Ship Behaviour and Performance in Head Seas due to Slow Steaming. Ocean Engineering, Volume 97, pp. 186–206

Turner, H., Taplin, A., 1968. The Resistance of Large Powered Catamaran. Transactions of the Society of Naval Architects and Marine Engineers, SNAME, Volume 76, pp. 180–213

Utama, I.K.A.P., 1999. Investigation of the Viscous Resistance Components of Catamaran Forms. University of Southampton

Wilson, R.V., Ji, L., et al., 2008. Simulation of Large Amplitude Ship Motions for Prediction of Fluid Structure Interaction. In: Proceedings of the 27th Symposium on Naval Hydro- dynamics. ONR, Seoul

Zaghi, S., Broglia, R., Mascio, A.Di., 2010. Experimental and Numerical Investigations on Fast Catamarans Interference Effects. In: Proceedings of the 9th International Conference on Hydrodynamics. pp. 528–533

Zlatev, Z. et al., 2009. Combined Model-scale EFD-CFD Investigation of the Maneuvering Characteristics of a High Speed Catamaran. In: Proceedings of the 10th International Conference Fast Sea Transportation. Athens, Greece