A numerical investigation of the squat and resistance of ships advancing through a canal using CFD

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

As a ship approaches shallow water, a number of changes arise owing to the hydrodynamic interaction between the bottom of the ship’s hull and the seafloor. The flow velocity between the bottom of the hull and the seafloor increases, which leads to an increase in sinkage, trim and resistance. As the ship travels forward, squat of the ship may occur, stemming from this increase in sinkage and trim. Knowledge of a ship’s squat is necessary when navigating vessels through shallow water regions, such as rivers, channels and harbours. Accurate prediction of a ship’s squat is therefore essential, to minimize the risk of grounding for ships. Similarly, predicting a ship’s resistance in shallow water is equally important, to be able to calculate its power requirements. The key objective of this study was to perform fully nonlinear unsteady RANS simulations to predict the squat and resistance of a model-scale Duisburg Test Case container ship advancing in a canal. The analyses were carried out in different ship drafts at various speeds, utilizing a commercial CFD software package. The squat results obtained by CFD were then compared with available experimental data.

LanguageEnglish
Pages86-101
Number of pages16
JournalJournal of Marine Science and Technology
Volume21
Issue number1
Early online date28 Jul 2015
DOIs
Publication statusPublished - 1 Mar 2016

Fingerprint

Canals
canal
Computational fluid dynamics
Ships
shallow water
hull
seafloor
container ship
ship
Water
Electric grounding
Ports and harbors
river channel
Software packages
Flow velocity
flow velocity
Containers
Drag
harbor
vessel

Keywords

  • CFD
  • numerical ship hydrodynamics
  • shallow water
  • ship squat
  • unsteady RANS

Cite this

@article{8afe2310862a4d04aac5c5c2a88dc669,
title = "A numerical investigation of the squat and resistance of ships advancing through a canal using CFD",
abstract = "As a ship approaches shallow water, a number of changes arise owing to the hydrodynamic interaction between the bottom of the ship’s hull and the seafloor. The flow velocity between the bottom of the hull and the seafloor increases, which leads to an increase in sinkage, trim and resistance. As the ship travels forward, squat of the ship may occur, stemming from this increase in sinkage and trim. Knowledge of a ship’s squat is necessary when navigating vessels through shallow water regions, such as rivers, channels and harbours. Accurate prediction of a ship’s squat is therefore essential, to minimize the risk of grounding for ships. Similarly, predicting a ship’s resistance in shallow water is equally important, to be able to calculate its power requirements. The key objective of this study was to perform fully nonlinear unsteady RANS simulations to predict the squat and resistance of a model-scale Duisburg Test Case container ship advancing in a canal. The analyses were carried out in different ship drafts at various speeds, utilizing a commercial CFD software package. The squat results obtained by CFD were then compared with available experimental data.",
keywords = "CFD, numerical ship hydrodynamics, shallow water, ship squat, unsteady RANS",
author = "Tahsin Tezdogan and Atilla Incecik and Osman Turan",
year = "2016",
month = "3",
day = "1",
doi = "10.1007/s00773-015-0334-1",
language = "English",
volume = "21",
pages = "86--101",
journal = "Journal of Marine Science and Technology",
issn = "0948-4280",
number = "1",

}

TY - JOUR

T1 - A numerical investigation of the squat and resistance of ships advancing through a canal using CFD

AU - Tezdogan, Tahsin

AU - Incecik, Atilla

AU - Turan, Osman

PY - 2016/3/1

Y1 - 2016/3/1

N2 - As a ship approaches shallow water, a number of changes arise owing to the hydrodynamic interaction between the bottom of the ship’s hull and the seafloor. The flow velocity between the bottom of the hull and the seafloor increases, which leads to an increase in sinkage, trim and resistance. As the ship travels forward, squat of the ship may occur, stemming from this increase in sinkage and trim. Knowledge of a ship’s squat is necessary when navigating vessels through shallow water regions, such as rivers, channels and harbours. Accurate prediction of a ship’s squat is therefore essential, to minimize the risk of grounding for ships. Similarly, predicting a ship’s resistance in shallow water is equally important, to be able to calculate its power requirements. The key objective of this study was to perform fully nonlinear unsteady RANS simulations to predict the squat and resistance of a model-scale Duisburg Test Case container ship advancing in a canal. The analyses were carried out in different ship drafts at various speeds, utilizing a commercial CFD software package. The squat results obtained by CFD were then compared with available experimental data.

AB - As a ship approaches shallow water, a number of changes arise owing to the hydrodynamic interaction between the bottom of the ship’s hull and the seafloor. The flow velocity between the bottom of the hull and the seafloor increases, which leads to an increase in sinkage, trim and resistance. As the ship travels forward, squat of the ship may occur, stemming from this increase in sinkage and trim. Knowledge of a ship’s squat is necessary when navigating vessels through shallow water regions, such as rivers, channels and harbours. Accurate prediction of a ship’s squat is therefore essential, to minimize the risk of grounding for ships. Similarly, predicting a ship’s resistance in shallow water is equally important, to be able to calculate its power requirements. The key objective of this study was to perform fully nonlinear unsteady RANS simulations to predict the squat and resistance of a model-scale Duisburg Test Case container ship advancing in a canal. The analyses were carried out in different ship drafts at various speeds, utilizing a commercial CFD software package. The squat results obtained by CFD were then compared with available experimental data.

KW - CFD

KW - numerical ship hydrodynamics

KW - shallow water

KW - ship squat

KW - unsteady RANS

U2 - 10.1007/s00773-015-0334-1

DO - 10.1007/s00773-015-0334-1

M3 - Article

VL - 21

SP - 86

EP - 101

JO - Journal of Marine Science and Technology

T2 - Journal of Marine Science and Technology

JF - Journal of Marine Science and Technology

SN - 0948-4280

IS - 1

ER -