Dissertation > Excellent graduate degree dissertation topics show

Vortex method based on vortex motion studies

Author: LiuYu
Tutor: HuangHaiMing
School: Beijing Jiaotong University
Course: Solid Mechanics
Keywords: Flow around a cylinder Vortex Method Compressible flow Vortex merging
CLC: O354
Type: Master's thesis
Year: 2011
Downloads: 53
Quote: 0
Read: Download Dissertation

Abstract


Vortex method as a Lagrangian method, high-precision , easy to deal with complex boundary conditions can be directly simulated Navier-Stokes equations and other features make the vortex method has other advantages unmatched computational fluid dynamics methods commonly used in the simulation of unsteady flow field and the complex flow field, eddy current method for the application of more particle strength exchange method . However vortex method is mainly used for the numerical simulation of incompressible flows , its researchers have long vortex method to expand the field of compressible flow to pay unremitting efforts , but few are convincing results . In recent years, some scholars have proposed an improved method for the expansion volume vortex vortex method for the numerical simulation of compressible flow , but change method is not perfect, there is still to be developed. Based on the particle strength exchange method, common in engineering serial flow around two cylinders were simulated ; swelling volume using vortex method for compressible flow field of the vortex merger was simulated for compressible flow field of the vortex merging discussed. The main contents are: ( 1 ) The use of particle strength exchange method for Re = 200 and Re = 300 tandem pair of cylinders both cases the numerical simulation of flow around , get a different cylinder spacing variation of flow field , the results show : For the tandem pair of flow around a cylinder whose cylindrical spacing exists a critical value , the flow field near the critical value of two cylindrical shape and the kinetic parameters are mutated ; Pitch with this critical Reynolds number flow decreases the conclusions are consistent with the experimental observations , the results with the experimental results consistent with previous calculations ; ( 2 ) the amount of swelling vortex method using respectively two and three vortices merge process was simulated , analyzed the merger process the evolution of the structure of each physical field . The results show that: for the same radius of the vortex two different Mach has no significant impact for the merger process ; same amount for the ring , but two different vortex Mach number , when the Mach number difference between the larger , smaller Mach vortex in the merger process will be larger vortex Mach absorption ; for the same three vortex Mach initial arranged in different ways , the merger process is also different.

Related Dissertations

  1. Experiment of Spatial Evolution Established in the Wake of Circular Cylinder under Interference,O353.4
  2. Evolution of Two-dimensional Circular Cylinder Wake between Parallel Walls,TB126
  3. Heat Transfer and Fluid Flow Across Micro-tubes Using Lattice Boltzmann Method,TK124
  4. Theory of lattice Boltzmann method and its application in fluid dynamics,O35
  5. Boltzmann Method Based on Numerical Calculation of Fluid Flows Around Cylinders,TK124
  6. Lattice Boltzmann Simulation of the Flow Around a Circular Cylinder,O357.1
  7. Incompressible fluid spectral element method calculation of export comparative study boundary conditions,O351
  8. Viscous / viscous coupling Nonconforming spectral element method and the viscous flow around a cylinder / non- viscous numerical analysis,O357
  9. Lattice Boltzmann Simulation of Karman Street,O357.1
  10. Hydrogen bubble digital particle image velocimetry,O353.5
  11. Unstructured grid for solving differential equations and the application of commercial software Fluent,O175.7
  12. Based on the PSE compressible boundary layer stability,V211.1
  13. Several studies of hydrodynamic equations with the diffusion equation finite point method,O35
  14. Large Eddy Simulation of the Compressible Flow Past a Circular Cylinder and Its Flow Control,O354
  15. Parallel Algorithms and Applications for 3-D Compressible High-speed Flows Based on Boltzmann Equations,O246
  16. Research and Application of Some Dynamic Problems of the Recovery System of Manned Spacecraft,V525
  17. Unsteady Numerical Method Based on Dynamic Hybrid Mesh and Simulation of Bio-fluid Flows,O357.1
  18. Numerical Simulation of Vortex-Induced Vibration Using Discrete Vortex Method,P75
  19. Numerical Simulation Research on Flow Past a Free Surface Piercing Circular Cylinder,U661
  20. Cut to shed the electromagnetic control of the flow around a cylinder,O441.4
  21. Mechanism Research on Flow Separation Control,U661.1

CLC: > Mathematical sciences and chemical > Mechanics > Fluid Mechanics > Gas dynamics ( compressible fluid dynamics)
© 2012 www.DissertationTopic.Net  Mobile