Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/13187
Title: Numerical Simulation of Moving Boundary Problems with Application to Fish Swimming
Authors: ANG SZE JIUNN
Keywords: Meshless, hybrid meshfree-Cartesian grid, SVD, GFD, close interactions, fluid structure interaction, deforming body, fish swimming, self propulsion.
Issue Date: 4-May-2008
Source: ANG SZE JIUNN (2008-05-04). Numerical Simulation of Moving Boundary Problems with Application to Fish Swimming. ScholarBank@NUS Repository.
Abstract: This thesis focuses on the development of a hybrid meshfree-Cartesian grid scheme based on generalized finite difference (GFD) method for simulation of fluid flows involving moving boundary. Results show that the present singular-value decomposition (SVD)-based GFD method is more robust and accurate than the conventional least square (LS)-based GFD scheme. To overcome the problem of numerical instability that comes from clustering of computational nodes, a nodal selection scheme is introduced and applied to flow problems involving close interactions of moving bodies. The present scheme is further developed for problems involving deforming boundaries and coupled fluid-structure interaction (FSI). The latter is accomplished by an implicit iterative scheme. The FSI procedure is validated on a series of sedimentation problems and the migration of a cylinder in shear flow. The full methodology is applied to problems in undulatory-body self propulsion. Simulations of the fish undergoing cyclic/steady swimming and sharp turning manoeuvre at Reynolds number of up to 5000 are performed. Swimming towards a designated target is simulated with the help of a feedback control algorithm.
URI: http://scholarbank.nus.edu.sg/handle/10635/13187
Appears in Collections:Ph.D Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
Cover Page.pdf7.24 kBAdobe PDF

OPEN

NoneView/Download
Chapter 0.pdf105.12 kBAdobe PDF

OPEN

NoneView/Download
Chapter 1.pdf118.45 kBAdobe PDF

OPEN

NoneView/Download
Chapter 2.pdf173.98 kBAdobe PDF

OPEN

NoneView/Download
Chapter 3.pdf523.8 kBAdobe PDF

OPEN

NoneView/Download
Chapter 4.pdf360.4 kBAdobe PDF

OPEN

NoneView/Download
Chapter 5.pdf818.9 kBAdobe PDF

OPEN

NoneView/Download
Chapter 7.pdf2.2 MBAdobe PDF

OPEN

NoneView/Download
Chapter 8.pdf15.74 kBAdobe PDF

OPEN

NoneView/Download
Chapter 9.pdf104.66 kBAdobe PDF

OPEN

NoneView/Download
Chapter 10.pdf27.95 kBAdobe PDF

OPEN

NoneView/Download
Chapter 11.pdf17.95 kBAdobe PDF

OPEN

NoneView/Download
Chapter 6.pdf150.23 kBAdobe PDF

OPEN

NoneView/Download

Page view(s)

420
checked on Dec 11, 2017

Download(s)

3,248
checked on Dec 11, 2017

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.