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Analysis and Application of Immersed Boundary Method to Inflation Process

Author: RenWeiWei
Tutor: SunJianHong
School: Nanjing University of Aeronautics and Astronautics
Course: Machine and Environmental Engineering
Keywords: Fluid-structure interaction Large deformation Immersed boundary method Gasbag Aerated
CLC: V244.11
Type: Master's thesis
Year: 2009
Downloads: 93
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Abstract


The immersed boundary method is a kind of treatment in the Cartesian coordinate system moving curved boundary emerging computing method that is well suited to simulate the complex interaction of the multi - sports or deformable objects , and the program is simple and easy to implement . So , since 1972, Peskin as a simulation of the fluid in the body 's cardiovascular system - elastomer coupling model is widely used in a variety of fluid-structure interaction and biological fluid mechanics problems . This article first details on the basis of the immersed boundary method based on the standard projection method ( verified) immersed boundary method in large deformation fluid-structure interaction problems , the ability to simulate multi-media flow problem , the other rounded cavity deformation of the film movement , shear flow droplet deformation and buoyancy underwater bubbles floating movement simulation and analysis , and the calculated data obtained with the existing literature is consistent with the previous numerical results and experimental results to verify the self- The program can correctly simulate large deformation fluid-structure interaction and density than the multi-media flow problems . The same time, the establishment of a simplified two-dimensional interaction with the flow field around the air bag inflatable model , the immersed boundary method applied for the first time to exploratory simulation , the tensile stress of the time variation of the process of airbag inflator balloon shape , volume, air bag and airbag on some of the characteristics Lagrangian point of the time variation of the force of the flow field . The simulation results show that : the maximum tensile force is mainly concentrated in the process of the airbag inflator in the airbag on both sides close to the intake port for engineering design to provide a more reliable means of auxiliary .

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CLC: > Aviation, aerospace > Aviation > Aircraft instrumentation,avionics, flight control and navigation > Protection, life - saving equipment and technology > Protective equipment > Anti-collision device
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