Computational modelling of squat and resistance optimisation in fully confined water

Tools

Terziev, Momchil and Iqbal, Muhammad and Wei, Yujia and Incecik, Atilla; Eloot, Katrien and Verwilligen, Jeroen and Claes, Steve and Delefortrie, Guillaume and Lataire, Evert, eds. (2025) Computational modelling of squat and resistance optimisation in fully confined water. In: 7th MASHCON International Conference on Ship Manoeuvring in Shallow and Confined Water with non-exclusive focus on clean power in shallow water. Flanders Hydraulics/Ghent University, BEL, pp. 202-212. (https://doi.org/10.48607/316)

[thumbnail of Terziev-etal-MASHCON-2025-Computational-modelling-of-squat-and-resistance-optimisation-in-fully-confined-water]
Preview
 Text. Filename: Terziev-etal-MASHCON-2025-Computational-modelling-of-squat-and-resistance-optimisation-in-fully-confined-water.pdf
Final Published Version
License: Creative Commons Attribution 4.0 logo
Download (1MB)| Preview

Abstract

Ship squat in confined waters is of critical importance for safe and efficient operations. However, little is known about the relationship between the magnitude of the maximum squat and the resistance, and if it is possible to reduce squat by imposing changes in trim through variations in the position of the centre of gravity of a ship. The present paper investigates these questions through the use of Reynolds Averaged Navier-Stokes modelling, applied to the KRISO container ship at a scale of 1:75. It is found that at the low speed investigated of F_h=0.303, the dynamic trim is dominated by the initial assignment and changes in sinkage are responsible for a complex behaviour exhibited by the total resistance. The set of optimum values expressing the trade-off between squat and resistance is found to be such that higher squat values are predicted to be able to improve resistance at the investigated speed.

ORCID iDs

Terziev, Momchil ORCID logoORCID: https://orcid.org/0000-0002-1664-6186, Iqbal, Muhammad, Wei, Yujia and Incecik, Atilla ORCID logoORCID: https://orcid.org/0009-0006-8895-1717; Eloot, Katrien, Verwilligen, Jeroen, Claes, Steve, Delefortrie, Guillaume and Lataire, Evert
CORE (COnnecting REpositories)