Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/32483
Title: APPLICATION OF SEMI-LAGRANGIAN METHOD FOR VISUALIZATION OF NEAR-BODY HYDRODYNAMICS AND ENHANCEMENT OF AMORPHOUS EFFECT.
Authors: TRUONG DUC THANG
Keywords: Fluid Visualization, Semi-Lagrangian Method, Near-body Hydrodynamics, 3D, Computer Graphics, Fluid Interaction
Issue Date: 6-Jan-2012
Source: TRUONG DUC THANG (2012-01-06). APPLICATION OF SEMI-LAGRANGIAN METHOD FOR VISUALIZATION OF NEAR-BODY HYDRODYNAMICS AND ENHANCEMENT OF AMORPHOUS EFFECT.. ScholarBank@NUS Repository.
Abstract: Efficient numerical techniques developed in the field of computer graphics are able to simulate compellingly realistic simulations of interactions between solids and fluids. In this work, we apply one of these techniques, the Semi-Lagrangian Stable Fluids method coupled with a new model of interaction between fluid and general semi-rigid 3D meshes, to biomechanical hydrodynamics visualization. The near-body surface dynamics provide meaningful information for rendering visuals that are intuitive to the streamlined flow characteristics surrounding the body. Our results show the visualization of active and passive resistive forces on the body in a video-based capture of an immersed dolphin kick. We also applied the resultant fluid field in a novel application where procedural fire trails of a muscle-shape body was directed by its near-body fluid dynamics. The techniques we employed are less used for engineering applications due to errors which are inherent outcomes of systemic approximations in its formulation. The errors, manifesting as excessive damping, are expected to change the nature of steady-state fields and nullify the typical engineering static flow analysis. On the other hand, near-body solid/fluids interaction are affected to a lesser degree since errors originating from dissipation are more severe when accumulated over time. Although it is generally not possible to numerically validate unsteady, high-velocity vector fields, our investigations show that near-body solid/fluid dynamics converges with respect to parametric refinements. Though far from a correctness proof, the numerical convergence of near-body quantities suggests the applicability of the method to certain classes of analysis and visualization where near-body characteristics are of greater concern.
URI: http://scholarbank.nus.edu.sg/handle/10635/32483
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