Dissertation > Excellent graduate degree dissertation topics show

The Comparison, Improvement and Application of Turbulence Models

Author: ZhuXuDong
Tutor: ZhouChunHua
School: Nanjing University of Aeronautics and Astronautics
Course: Fluid Mechanics
Keywords: N-S equation Turbulence model High Reynolds number flow Artificial viscosity Triangular mesh
CLC: O357.5
Type: Master's thesis
Year: 2005
Downloads: 1063
Quote: 4
Read: Download Dissertation

Abstract


This article discusses the algebraic turbulence model and the two - equation turbulence model in the numerical solution of the Reynolds averaged NS equations and turbulence model , some of the improvement and development . The NS equations space is discrete Galerkin finite element format , the time to promote the application of explicit in five steps RK format . NS equation numerical viscosity in order to ensure a high Reynolds number is much smaller than the physical viscous artificial viscosity term directional correction and the introduction of appropriate boundary conditions . The SST turbulence equation solving implicit format , point-of-use time advancing and thus lifted due to the presence of a source term due to the restrictions of the time step , to ensure stability when the turbulence equations and flow equations to proceed . The convective terms in the turbulence equations , discrete, first-order upwind scheme in order to further ensure the positive value of the time to promote stability and turbulence variables . Finally , through numerical experiments of various turbulence model comparison summary grid and other factors , such as computing , given the large number of numerical results are compared with experimental results in order to verify the improvement of this article on the development of numerical methods and turbulence models .

Related Dissertations

  1. Research of the Performances of Ferroelectric Film and Compositional-Graded Ferroelectric Film,TM221
  2. Traveling Wave Solutions for Two Classes of Nonlinear Wave Equations,O175.29
  3. Growth Pattern of Marsupenaeus Japonicus and Succesion of Plankton Community in Intensive Model,S968.22
  4. Based on SEM Quality Evaluation of Rural Compulsory Education in China,G522.3
  5. Lijiang River,RS and GIS - based Soil Erosion Research,S157
  6. Research on Effect Relationship of the Innovation Resources Environment, Technological Innovation Capability and the Innovation Performance,F273.1
  7. Integrable Discretizations to a Class of Soliton Equations,O175.2
  8. The Research on Nonsingular Solution of the Sylvester Equation Based on Quadratic System Decoupling,O175
  9. Analysis of Concrete Durability under Combined Action of Freeze-thaw Cycles and Chloride Ion Erosion,TU528
  10. A Study on Removal Characteristics and Kinetics Model for Denitrification of AAO Technology,X703
  11. Study on Vertical Coordination and Cow Breeders’Quality Control in Nanjing,F322
  12. Study on Reaction-diffusion Model of Educational Innovation,G40
  13. Investigations on Related Problems of the Integrable Coupling Systems and the Exact Solutions of Nonlinear Differential-Difference Equations,O175.7
  14. Research on Super-resolution Reconstruction in SAR Image,TN957.52
  15. Low-frequency elastic wave channel characteristics of the earth,TN914
  16. Based on SEM and college sports shoes consumer complaint behavior research,F426.86;F224
  17. Frobenius nonlinear evolution equations integrable solutions and the expansion of integrable systems,O175.5
  18. Some losses renewal equation equivalent conditions for asymptotic,O211.67
  19. A Summary of the Control Problems for Evolution Equations in Non-Cylindrical Domains,O232
  20. Research on Characteristics of Adolescent Risk Behavior and Exploration on Protection/Risk Model,D669.5
  21. The Integration of Information Technology and High School Mathmatics,G633.6

CLC: > Mathematical sciences and chemical > Mechanics > Fluid Mechanics > Viscous fluid > Turbulence ( turbulence )
© 2012 www.DissertationTopic.Net  Mobile