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Study on Real-Time Interaction Improvement of Smoke and Obstacles Based on Overlapping Grids

Author: MaKunZuo
Tutor: TangYong
School: Yanshan University
Course: Applied Computer Technology
Keywords: Smoke Simulation N - S equations Solid obstruction Node grouping method Multigrid Local grid Reynolds number
CLC: TP391.41
Type: Master's thesis
Year: 2010
Downloads: 7
Quote: 0
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Abstract


The smoke simulation frequent used in a variety of simulations . Until today, the smoke simulation is still a challenging task . Affect the authenticity of smoke simulation and real-time performance of a variety of factors , focus on the following aspects of in-depth study and exploration . First , the introduction of an obstacle with smoke interact to improve simulation authenticity , and the introduction of node grouping method to deal with the obstacle boundary conditions . All grid nodes in the scene in accordance with the different positions of the obstacles relationship classification smoke flow around obstacles , and then depending on the type of node processing , in order to achieve the processing of any obstacle boundary conditions to meet the smoke and complexity need of obstructions interaction . Second, the simulation scenarios are more complex, the smoke often need to interact with a large number of obstacles . Smoke in the high-precision grid very time-consuming , and interact with a large number of obstacles in order to improve the visual details of the smoke flow around obstacles and ensure that simulate real-time , the introduction of the multi- grid technology . Around each obstacle , surrounded by a local grid , local grid accuracy are higher than the global grid , thereby obstacles interactive visual details to ensure real-time simulation . Proposed that the distance between the obstacle shape complexity, the local grid and the viewpoint , the intensity of the smoke movement combined , to determine the appropriate local grid accuracy , in order to further improve simulation of the real-time nature . Finally, the use of the integrated development environment the VC6.0 and open graphics library OpenGL on the Windows platform, to design smoke and obstacles , real-time interactive system , to validate the algorithm validity system based entirely on the GPU implementation . The experiments show that the proposed method , the obstacles around the smoke flow details can be accurately captured by improved simulation speed than the the the traditional multigrid algorithm speed has been significantly improved local mesh accuracy decision .

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