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RANS computational fluid dynamics predictions of pitch and heave ship motions in head seas

RANS computational fluid dynamics predictions of pitch and heave ship motions in head seas
RANS computational fluid dynamics predictions of pitch and heave ship motions in head seas
This work extends the previous effort in unsteady Reynolds averaged Navier-Stokes (RANS) simulations developed by the ship hydrodynamics group of the University of Iowa Iowa Institute of Hydraulic Research to the capability to predict pitch and heave motions of ships with forward speed in regular head seas. The simulations are performed with CFDSHIP-IOWA, which is a general-purpose, multiblock, high-performance parallel computing RAINS code. Numerical verification studies in space and time demonstrate convergence for nearly all variables. The modified Wigley hull form experimental data presented in Journee (1992) are compared with simulation results over a range of Froude numbers, wavelengths, and wave amplitudes and found to give accurate results, with uncertainties less than 2\%. Viscous ship motions characteristics are investigated by decomposing the full nonlinear problem into the forward speed diffraction and pitch and heave radiation problems, in the manner of strip theory. Comparisons between the current viscous RAINS solutions and those from experiments, strip theory, and nonlinear potential flow simulations show the RANS method to predict damping and added mass coefficients with a high degree of accuracy.
0022-4502
80-97
Weymouth, Gabriel David
b0c85fda-dfed-44da-8cc4-9e0cc88e2ca0
Wilson, Robert Vance
898b6fb6-a68b-4ac4-a1d5-e9b813d1fa73
Stern, Frederick
083e13f9-90e0-4095-a561-87121de28a0a
Weymouth, Gabriel David
b0c85fda-dfed-44da-8cc4-9e0cc88e2ca0
Wilson, Robert Vance
898b6fb6-a68b-4ac4-a1d5-e9b813d1fa73
Stern, Frederick
083e13f9-90e0-4095-a561-87121de28a0a

Weymouth, Gabriel David, Wilson, Robert Vance and Stern, Frederick (2005) RANS computational fluid dynamics predictions of pitch and heave ship motions in head seas. Journal of Ship Research, 49 (2), 80-97.

Record type: Article

Abstract

This work extends the previous effort in unsteady Reynolds averaged Navier-Stokes (RANS) simulations developed by the ship hydrodynamics group of the University of Iowa Iowa Institute of Hydraulic Research to the capability to predict pitch and heave motions of ships with forward speed in regular head seas. The simulations are performed with CFDSHIP-IOWA, which is a general-purpose, multiblock, high-performance parallel computing RAINS code. Numerical verification studies in space and time demonstrate convergence for nearly all variables. The modified Wigley hull form experimental data presented in Journee (1992) are compared with simulation results over a range of Froude numbers, wavelengths, and wave amplitudes and found to give accurate results, with uncertainties less than 2\%. Viscous ship motions characteristics are investigated by decomposing the full nonlinear problem into the forward speed diffraction and pitch and heave radiation problems, in the manner of strip theory. Comparisons between the current viscous RAINS solutions and those from experiments, strip theory, and nonlinear potential flow simulations show the RANS method to predict damping and added mass coefficients with a high degree of accuracy.

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Published date: June 2005
Organisations: Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 349790
URI: https://eprints.soton.ac.uk/id/eprint/349790
ISSN: 0022-4502
PURE UUID: 4ce8834a-fb54-42b2-8db3-a3d9ff61f004
ORCID for Gabriel David Weymouth: ORCID iD orcid.org/0000-0001-5080-5016

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Date deposited: 12 Mar 2013 13:49
Last modified: 19 Nov 2019 01:36

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