Numerical simulation of a floating body in multible degrees of freedom

J Westphalen; D M Greaves; A Hunt-Raby; Christopher J K Williams; P K Stansby; T Stallard

Numerical simulation of a floating body in multible degrees of freedom

J Westphalen, D M Greaves, A Hunt-Raby, Christopher J K Williams, P K Stansby, T Stallard

Department of Architecture & Civil Engineering

Research output: Chapter in Book/Report/Conference proceeding › Chapter

1 Citation (Scopus)

Abstract

Computational results for a floating body representing a single cylinder of the Manchester Bobber are compared with measured data from physical tank tests concerning the survivability of this wave energy converter in extreme waves. The float is connected to a counterweight via a pulley system, which is represented by additional forces and restricted degrees of motion in the computational approach. Two setups are discussed. In the first the float is restricted to move in vertical direction only. The second experiment also includes the horizontal displacement. The computations use a Navier-Stokes solver. The equations are discretised using a Finite Volume approach and solved for both water and air employing a Volume of Fluid method and a high resolution interface capturing scheme. For this challenging case, which also includes the inertia of the counterweight, rather than the motion of an independent floating body, the displacements of the float are presented and shown to be in reasonable agreement with the experiments.

Original language	English
Title of host publication	RINA, Royal Institution of Naval Architects - Marine Renewable and Offshore Wind Energy - Papers
Publisher	The Royal Institution of Naval Architects
Pages	81-88
Number of pages	8
ISBN (Print)	9781905040704
Publication status	Published - Apr 2010
Event	Marine Renewable and Offshore Wind Energy, April 21, 2010 - April 23, 2010 - London, UK United Kingdom Duration: 1 Apr 2010 → …

Conference

Conference	Marine Renewable and Offshore Wind Energy, April 21, 2010 - April 23, 2010
Country	UK United Kingdom
City	London
Period	1/04/10 → …

Access to Document

http://www.rina.org.uk/renewable2010

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Cite this

Westphalen, J., Greaves, D. M., Hunt-Raby, A., Williams, C. J. K., Stansby, P. K., & Stallard, T. (2010). Numerical simulation of a floating body in multible degrees of freedom. In RINA, Royal Institution of Naval Architects - Marine Renewable and Offshore Wind Energy - Papers (pp. 81-88). The Royal Institution of Naval Architects.

Numerical simulation of a floating body in multible degrees of freedom. / Westphalen, J; Greaves, D M; Hunt-Raby, A; Williams, Christopher J K; Stansby, P K; Stallard, T.

RINA, Royal Institution of Naval Architects - Marine Renewable and Offshore Wind Energy - Papers. The Royal Institution of Naval Architects, 2010. p. 81-88.

Research output: Chapter in Book/Report/Conference proceeding › Chapter

Westphalen, J, Greaves, DM, Hunt-Raby, A, Williams, CJK, Stansby, PK & Stallard, T 2010, Numerical simulation of a floating body in multible degrees of freedom. in RINA, Royal Institution of Naval Architects - Marine Renewable and Offshore Wind Energy - Papers. The Royal Institution of Naval Architects, pp. 81-88, Marine Renewable and Offshore Wind Energy, April 21, 2010 - April 23, 2010, London, UK United Kingdom, 1/04/10.

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abstract = "Computational results for a floating body representing a single cylinder of the Manchester Bobber are compared with measured data from physical tank tests concerning the survivability of this wave energy converter in extreme waves. The float is connected to a counterweight via a pulley system, which is represented by additional forces and restricted degrees of motion in the computational approach. Two setups are discussed. In the first the float is restricted to move in vertical direction only. The second experiment also includes the horizontal displacement. The computations use a Navier-Stokes solver. The equations are discretised using a Finite Volume approach and solved for both water and air employing a Volume of Fluid method and a high resolution interface capturing scheme. For this challenging case, which also includes the inertia of the counterweight, rather than the motion of an independent floating body, the displacements of the float are presented and shown to be in reasonable agreement with the experiments.",

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