Dissertation > Excellent graduate degree dissertation topics show

Smoke simulation model based on physical

Author: ZuoZuoDan
Tutor: WangJiWen
School: Anhui University
Course: Applied Computer Technology
Keywords: Smoke simulation Navier-Stokes equations Physical model USCIP method OpenGL
CLC: TP391.41
Type: Master's thesis
Year: 2011
Downloads: 36
Quote: 0
Read: Download Dissertation

Abstract


Fluid simulation is the focus of research in the field of computer graphics, fluid smoke as an important part of its analog being more and more attention. Smoke movement simulation are generally two ways, based on smoke particle system simulation and physical model-based smoke simulation. Based on Particle System Simulation only under certain conditions in order to meet the real-time simulation requirements. Physics-based simulation of smoke fumes main idea is to reflect the movement of the equation, the building of smoke movement model, through the appropriate choice of numerical methods for solving their model equations, solving equations can be obtained at each time during the movement state of motion, combined with graphic drawing tools can be drawn on the simulation results. The resulting effect is more in line with its actual movement of the smoke. Physical model-based method, the smoke simulation, the main process can be divided into three steps: the first is used to determine the physical model of smoke. This article uses the incompressible Navier-Stokes equations as its basic physical model and added the smoke density with the movement velocity change of the equation. Assuming the text entry incompressible equations viscosity viscosity coefficient of zero, simplifying numerical equations. To reduce the numerical dissipation introduced whirlpool operator added that due to the loss of numerical dissipation of energy, the equation of the vortex binding force as a component of the equation. Then the selected numerical solution of the physical model, this paper using the finite difference method to solve partial differential equations, with the grid on the field equations discrete step equations for smog physical model for numerical calculation. Solving the projection and diffusion term, the use of the Gauss - Seidel iterative method, which guarantee the stability of the larger time steps; on solving the advection equation when it was introduced in two ways: first half selected unconditionally stable Lagrangian method for solving convection term, semi-Lagrangian method is stable and easy to solve the existence of a large number of numerical dissipation; then focuses on the use of an improved CIP method for solving convection order items. Original CIP method is unstable, this improved CIP method is to unconditionally stable and precision with third order equation. This smoke movement is in a closed environment of. Finally, there is smoke motion graphics rendering. Using open OpenGL graphics interface to draw the smoke movement. This paper introduced to reduce the numerical dissipation whirlpool binding the basis of the physical model equations, drawn using the semi-Lagrangian method for solving advection scheme graphics and the use of improved CIP method to solve advection scheme graphics.

Related Dissertations

  1. Design and Implementation of Human Brain Anatomical Atlas,TP391.41
  2. Training Program and Rehabilitative Effect Appraisal of Lower Limbs Rehabilitative Robot,R49
  3. Design and Implementation of the Growing Visualization System for Wheat Population,S512.1
  4. The Morphological Structural Model and Visualization of Rapeseed (Brassica Napus L.) Plant,S565.4
  5. Research on CNC Milling System,TG547
  6. Research on Teaching System of Engineering Drawing Base on the Digitalized Technique,TB23-4
  7. The Research of Real-time Shadow Algorithms Based on OpenGL,TP391.41
  8. Lattice Boltzmann Simulation of Marangoni Convection with Soret Effects in an 2D Rectangular Cavity,O351
  9. Research on Sheet Metal CNC Cutting 3D Simulation,TG48
  10. Research on Evaluation of Knitted Fabric Pilling Grade Based on Three-Dimensional Scanning Technoligy,TP391.41
  11. Research of Reconstruction and Camera Pose Estimation on Mobile Phone,TP391.9
  12. Based on DirectShow and OpenGL video communication software design and implementation,TN919.8
  13. Large Radio Telescope active surface system control software development,TH751
  14. Passive microfluidic channel mixer topology optimization,TH703
  15. Robot-assisted upper limb rehabilitation study of virtual reality training system,TP391.9
  16. LED-based light-field scanning three-dimensional display technology and simulation reduction,TP391.41
  17. Based on wavelet analysis method for fast simulation of fluid,TP391.41
  18. Using frequency domain analysis of the details of the method of generating fluid animation,TP391.41
  19. Android-based multi- effects camera design and implementation,TP391.41
  20. Research and Implement on the Behavior Database of Virtual Hand,TP391.9
  21. Research on U-type Complementary Longitudinal Ventilation Mode of Highway Tunnel with Non-symmetric Wind Volume Demand,U453.5

CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
© 2012 www.DissertationTopic.Net  Mobile