Computational Fluid Dynamics Analysis of the Effect of Stern Shape Modifications on Ship Resistance

Julyus Acang Suwignyo Putro; I Putu Sindhu Asmara; Priyambodo Nur Ardi Nugroho

doi:10.21009/JKEM.11.2.7

Authors

Julyus Acang Suwignyo Putro Politeknik Perkapalan Negeri Surabaya
I Putu Sindhu Asmara Politeknik Perkapalan Negeri Surabaya
Priyambodo Nur Ardi Nugroho Politeknik Perkapalan Negeri Surabaya

DOI:

https://doi.org/10.21009/JKEM.11.2.7

Keywords:

hull optimization, resistance reduction, self-propelled oil barge, wake flow

Abstract

The change of the propulsion system usually involves structural modifications of the stern, which have a large impact on the hydrodynamic behaviour of the ship, e.g. the total resistance and the flow field. Calculations of the drag force and flow velocity are performed in order to investigate the effect of the stern modifications on the vessel resistance. The study was carried out by means of Computational Fluid Dynamics (CFD) simulations in the ANSYS Workbench environment. The research compared four different skeg size variants used after modification of the original hull of the ship. The simulation results show that the flow velocity of the original hull was 3.220 m/s and the drag force was 118.70 kN. Among the tested variations, variation 4 emerged as the most efficient design, yielding a reduced drag force of 81.59 kN and an increased flow velocity of 3.461 m/s. Ultimately, the proposed stern modification successfully lowered the total ship resistance from 118.70 kN to 82.93 kN, achieving a significant 30% reduction in resistance.

References

[1] P. Khorsandi and A. Hajivand, “AI-driven ship resistance prediction using three key hydrodynamic parameters,” International Journal of Maritime Technology, vol. 21, no. 1, pp. 71–79, 2025, doi: 10.61882/ijmt.21.1.71.

[2] A. Buonomano, G. Del Papa, G. F. Giuzio, R. Maka, A. Palombo, and G. Russo, “Design and retrofit towards zero-emission ships: decarbonization solutions for sustainable shipping,” Renewable and Sustainable Energy Reviews, vol. 213, p. 115384, 2025, doi: 10.1016/j.rser.2025.115384.

[3] B. Ali and L. Ali, “A new concept for design of the shape ship stern,” Global Journal of Information Technology, vol. 6, no. 1, pp. 18-26, 2016, doi: 10.18844/gjit.v6i1.385.

[4] K. Song, C. Guo, C. Wang, C. Sun, P. Li, and W. Wang, “Numerical analysis of the effects of stern flaps on ship resistance and propulsion performance,” Ocean Engineering, vol. 193, p. 106621, 2019, doi: 10.1016/j.oceaneng.2019.106621.

[5] Ratson Shipbuilding, “Self-propelled oil barges: an overview of their functionality and benefits,” https://www.ratson.com/en/home/infocenterdetail/id/76, 2023 (accessed 10 May 2026).

[6] A. A. Firmansyah, Sutoyo, Arleiny, and T. Pribadi, “Identification and solutions for cargo loss on self-propelled oil barge (SPOB) seroja V,” Journal of Engineering Science and Technology Management, vol. 6, no. 1, p. 349-358, 2026, doi: 10.31004/jestm.v6i1.407.

[7] F. I. Abdullah, “Kapal tanker ratu yamani terbakar di perairan taboneo, 12 ABK dievakuasi,” https://www.beritasatu.com/nusantara/1056939/kapal-tanker-ratu-yamani-terbakar-di-perairan-taboneo-12-abk-dievakuasi, 2023 (accessed 10 May 2026).

[8] R. A. Nabawi, B. Syahri, Y. D. Alfana, and D. Fernandez, “Hydrodynamic optimization of a sweptback stern foil for resistance reduction in flat-hull ships: a CFD-based extension of the hull vane concept,” Teknomekanik, vol. 9, no. 1, pp. 110–120, 2026, doi: 10.24036/teknomekanik.v9i1.54872.

[9] A. Firdhaus, Samuel, M. L. Hakim, O. Mursid, and J. R. Putra, “CFD analysis of a stern flap effect on the hydrodynamics of a catamaran ship,” Scientific Journal of Maritime Research [Pomorstvo], vol. 40, no. 2, pp. 165–176, 2026, doi: 10.31217/p.40.2.1.

[10] Romadhoni, B. Santoso, and M. A. Hafiz, “Intelligent optimization of fast boat hull form for resistance reduction using CFD and surrogate-assisted algorithms,” International Journal of Marine Engineering Innovation and Research, vol. 11, no. 1, pp. 139–146, 2026, doi: 10.12962/j25481479.v11i1.

[11] M. Iqbal, M. Terziev, T. Tezdogan, and A. Incecik, “Hull form optimisation to minimise the total resistance and dynamic responses of small fishing vessels,” Ocean Engineering, vol. 321, p. 120357, 2025, doi: 10.1016/j.oceaneng.2025.120357.

[12] T-. K. Le, N. V. He, N. V. Hien, and N-. T. Bui, “Effects of a bulbous bow shape on added resistance acting on the hull of a ship in regular head wave,” Journal of Marine Science and Engineering, vol. 9, no. 6, p. 559, 2021, doi: 10.3390/jmse9060559.

[13] W. Sulistyawati and P. J. Suranto, “Achieving drag reduction with hullform improvement in different optimizing methods,” International Journal of Technology, vol. 11, no. 7, pp. 1370-1379, 2020, doi: 10.14716/ijtech.v11i7.4468.

[14] N. K. Im, S. M. Lee, and C. K. Lee, “The influence of skegs on course stability of a barge with a different configuration,” Ocean Engineering, vol. 97, pp. 165–174, 2015, doi: 10.1016/j.oceaneng.2015.01.017.

[15] C. Lee and S. Lee, “Effect of skeg on the wave drift force and directional stability of a barge using computational fluid dynamics,” Journal of Marine Science and Engineering, vol. 8, no. 11, p. 844, 2020, doi: 10.3390/jmse8110844.

[16] H. Xie, X. Yang, Y. Hu, B. Yang, P. Wei, and W. Liang, “Numerical study on wake wave characteristics around a transom stern vessel,” Journal of Marine Science and Engineering, vol. 14, no. 5, p. 482, 2026, doi: 10.3390/jmse14050482.

[17] B-. S. Kim, M-. J. Oh, J-. H. Lee, Y-. H. Kim, and M-. I. Roh, “Study on hull optimization process considering operational efficiency in waves,” Processes, vol. 9, no. 5, p. 898, 2021, doi: 10.3390/pr9050898.

[18] H. Jasak, V. Vukčević, I. Gatin, and I. Lalović, “CFD validation and grid sensitivity studies of full scale ship self propulsion,” International Journal of Naval Architecture and Ocean Engineering, vol. 11, no. 1, pp. 33–43, 2019, doi: 10.1016/j.ijnaoe.2017.12.004.

[19] S. Adam, G. H. Gebremicheal, R. Swaminathan, S. Mohammed, S. Habtom, S. Huruy, and U. Yassin, “Design and optimization of ship hull for better fuel efficiency,” International Journal of Science and Research Archive, vol. 13, no. 1, pp. 029–036, 2024, doi: 10.30574/ijsra.2024.13.1.1526.

[20] M. A. Tariq, Z. M. Mahmood, M. A. Qureshi, N. Khan, M. J. Javaid, and B. Hussain, “CFD-based study of appendages design for dynamic stability of underwater vehicle,” Journal of Marine Science and Technology, vol. 30, pp. 658–676, 2025, doi: 10.1007/s00773-025-01075-x.

[21] Widodo, A. Yasim, Rina, and A. Ghofur, “Studi variasi model skeg berdasarkan tahanan dan pola aliran yang melewati lambung barge berpenggerak sendiri,” Jurnal Wave, vol. 12, no. 2, pp. 73-80, 2018, doi: 10.29122/jurnalwave.v12i2.3226.