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

Gabriel David Weymouth; Robert Vance Wilson; Frederick Stern

doi:10.5957/jsr.2005.49.2.80

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

Journal article

Peer reviewed

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

Gabriel David Weymouth, Robert Vance Wilson and Frederick Stern

Journal of ship research, Vol.49(2), pp.80-97

2005

DOI: 10.5957/jsr.2005.49.2.80

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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 RANS 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 RANS 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.

Applied Sciences

Exact sciences and technology

Ground, air and sea transportation, marine construction

Marine construction

Details

Title: Subtitle: Rans computational fluid dynamics predictions of pitch and heave ship motions in head seas
Creators: Gabriel David Weymouth - University of Iowa
Robert Vance Wilson - University of Iowa
Frederick Stern - University of Iowa
Resource Type: Journal article
Publication Details: Journal of ship research, Vol.49(2), pp.80-97
Publisher: Society of Naval Architects and Marine Engineers
DOI: 10.5957/jsr.2005.49.2.80
ISSN: 0022-4502
eISSN: 1542-0604
Language: English
Date published: 2005
Academic Unit: Mechanical Engineering
Record Identifier: 9984201546202771

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