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SPH Simulation of Fluid-Structure Interaction Problems with Application to Hovercraft

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dc.contributor.authorYang, Qingen
dc.contributor.committeechairMcCue-Weil, Leigh S.en
dc.contributor.committeememberTafti, Danesh K.en
dc.contributor.committeememberRoy, Christopher J.en
dc.contributor.committeememberPatil, Mayuresh J.en
dc.contributor.departmentAerospace and Ocean Engineeringen
dc.date.accessioned2014-03-14T20:09:25Zen
dc.date.adate2012-05-02en
dc.date.available2014-03-14T20:09:25Zen
dc.date.issued2011-12-06en
dc.date.rdate2012-05-02en
dc.date.sdate2012-04-11en
dc.description.abstractA Computational Fluid Dynamics (CFD) tool is developed in this thesis to solve complex fluid-structure interaction (FSI) problems. The fluid domain is based on Smoothed Particle Hydro-dynamics (SPH) and the structural domain employs large-deformation Finite Element Method (FEM). Validation tests of SPH and FEM are first performed individually. A loosely-coupled SPH-FEM model is then proposed for solving FSI problems. Validation results of two benchmark FSI problems are illustrated (Antoci et al., 2007; Souto-Iglesias et al., 2008). The first test case is flow in a sloshing tank interacting with an elastic body and the second one is dam-break flow through an elastic gate. The results obtained with the SPH-FEM model show good agreement with published results and suggest that the SPH-FEM model is a viable and effective numerical tool for FSI problems. This research is then applied to simulate a two-dimensional free-stream flow interacting with a deformable, pressurized surface, such as an ACV/SES bow seal. The dynamics of deformable surfaces such as the skirt/seal systems of the ACV/SES utilize the large-deformation FEM model. The fluid part including the air inside the chamber and water are simulated by SPH. A validation case is performed to investigate the application of SPH-FEM model in ACV/SES via comparison with experimental data (Zalek and Doctors, 2010). The thesis provides the theory of the SPH and FEM models incorporated and the derivation of the loosely-coupled SPH-FEM model. The validation results have suggested that this SPH-FEM model can be readily applied to skirt/seal dynamics of ACV/SES interacting with free-surface flow.en
dc.description.degreePh. D.en
dc.identifier.otheretd-04112012-000729en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-04112012-000729/en
dc.identifier.urihttp://hdl.handle.net/10919/26785en
dc.publisherVirginia Techen
dc.relation.haspartYang_Q_D_2011.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectAir Cushion Vehicle (ACV)en
dc.subjectSurface Effect Ship (SES)en
dc.subjectFinite Element Method (FEM)en
dc.subjectHovercraften
dc.subjectSmoothed Particle Hydrodynamics (SPH)en
dc.subjectFluid-Structure Interaction (FSI)en
dc.titleSPH Simulation of Fluid-Structure Interaction Problems with Application to Hovercraften
dc.typeDissertationen
thesis.degree.disciplineAerospace and Ocean Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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