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OpenGL Visualization Based on the Smoothed Particle Hydrodynamics Method

Author: LinZuo
Tutor: WangJiWen
School: Anhui University
Course: Applied Computer Technology
Keywords: Smooth and fluid dynamics Shallow water wave equation Navier-Stokes equations OpenGL Water animation Particle system
CLC: TP391.41
Type: Master's thesis
Year: 2011
Downloads: 89
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Abstract


The animated simulation technology has been widely applied to the field of film and television special effects, electronic game special effects. The requirements of the people on the screen fine and visual effects in film and television and computer games become more and more high. Animated simulation technology, simulation on fluid animation has been the past few years to study an interesting topic but also in practical, because of the particularity and complexity of the movement of the fluid itself, a general description of the analog way become less feasible because realistic strong advantage has been a great development, at the same time fluid simulation based on physics equations. Fluid simulation based on physics equations, many are using the grid method, This paper describes a typical Lagrangian meshless method - smooth particle hydrodynamics (Smoothed Particle Hydrodynamics, SPH) method. In this paper, the SPH method to solve the Navier-Stokes equations and the shallow water wave equation. Monaghan artificial viscosity is introduced deformation form in order to prevent interaction between the approaching particles penetrate eliminate numerical oscillations and thus play; number between adjacent particles in order to maintain and improve the accuracy and efficiency of the calculation, the article uses the variable the smooth-length method, in order to solve the boundary defects introduced Liu proposed two-tier method of virtual particles; article also briefly describes the most popular search strategies of several particles, compared listed the advantages and disadvantages of each search strategy; final visual effects in order to achieve data, this paper introduces OpenGL technology, OpenGL technology SPH method results drawn, and thus play a simulated real scene effect. Specific numerical simulation test, the first use of the shallow water wave equation combined SPH method shock and water flow side dam break simulation, and visualization results, followed by the two-dimensional Navier-Stokes equations dam-break problem solving classic. Finally, in order to be able to simulate the complex flow phenomena, this paper introduces a frequently used to simulate complex irregular object motion visualization method - particle system, a brief introduction by the particle system, we have come to the particle system can process of the characteristics of this feature and base ten physical equations effectively combine eventually simulate the effect of the fountain.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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