Type of Document Dissertation Author Yang, Qing URN etd-04112012-000729 Title SPH Simulation of Fluid-Structure Interaction Problems with Application to Hovercraft Degree PhD Department Aerospace and Ocean Engineering Advisory Committee
Advisor Name Title McCue-Weil, Leigh S. Committee Chair Patil, Mayuresh J. Committee Member Roy, Christopher J. Committee Member Tafti, Danesh K. Committee Member Keywords
- Air Cushion Vehicle (ACV)
- Surface Effect Ship (SES)
- Finite Element Method (FEM)
- Smoothed Particle Hydrodynamics (SPH)
- Fluid-Structure Interaction (FSI)
Date of Defense 2011-12-06 Availability unrestricted 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.
Filename Size Approximate Download Time (Hours:Minutes:Seconds)
28.8 Modem 56K Modem ISDN (64 Kb) ISDN (128 Kb) Higher-speed Access Yang_Q_D_2011.pdf 72.42 Mb 05:35:16 02:52:25 02:30:52 01:15:26 00:06:26
If you have questions or technical problems, please Contact DLA.