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Computational Fluid Dynamics Re-Mesh Method to Generating Hydrodynamic Models for Maneuvring Simulation of Two Submerged Bodies in Relative Motion


Leong, ZQ and Ranmuthugala, SD and Penesis, I and Nguyen, HD, Computational Fluid Dynamics Re-Mesh Method to Generating Hydrodynamic Models for Maneuvring Simulation of Two Submerged Bodies in Relative Motion, Journal of Computer Science and Cybernetics, 27, (4) pp. 1-10. ISSN 1813-9663 (2011) [Refereed Article]

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Copyright 2011 Journal of Computer Science and Cybernetics

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An Autonomous Underwater Vehicle (AUV) operating closer to a larger vessel experiences significant hydrodynamic forces requiring an adaptive control mechanism to maintain acceptable trajectory. It is therefore important that the designer understands the hydrodynamic characteristics of the vehicle in this scenario in order to develop appropriate control algorithms to deal with its dynamic behaviour. This requires developing simulations of the vehicles behaviour close to the larger vessel, the control algorithms, and the dynamic interface between the two. This paper presents a method to generate a complete hydrodynamic model of underwater vehicles using the Computational Fluid Dynamics (CFD) code ANSYS CFX, which can then be interfaced with the vehicles control algorithms within a simulation environment. The essential aspect of the method is the re-mesh approach, where the mesh deforms locally around the bodies using an Arbitrary Lagrangian-Eulerian form of the governing fluid equations and re-meshes when the deformation significantly compromises the quality of the mesh. This overcomes the motion limitations imposed by a pure deforming mesh approach. Preliminary work to validate the method is based on two smooth spheres moving relative to each other. It shows that this method is able to adequately simulate the fluid behaviour around the bodies. The paper also describes the future work focused on a 6 degrees-of-freedom (6-DOF) AUV modelled in CFD to obtain its hydrodynamic behaviour to be interfaced to the control system within MATLAB.

Item Details

Item Type:Refereed Article
Keywords:CFD, Hydrodynamics, Interaction, Underwater Vehicles
Research Division:Engineering
Research Group:Maritime engineering
Research Field:Ship and platform structures (incl. maritime hydrodynamics)
Objective Division:Transport
Objective Group:Water transport
Objective Field:Water transport not elsewhere classified
UTAS Author:Leong, ZQ (Dr Zhi Leong)
UTAS Author:Ranmuthugala, SD (Professor Dev Ranmuthugala)
UTAS Author:Penesis, I (Professor Irene Penesis)
UTAS Author:Nguyen, HD (Dr Hung Nguyen)
ID Code:79884
Year Published:2011
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2012-10-09
Last Modified:2013-05-28
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