Numerical Studies of Dispersion Processes in Two-dimensional, Homogeneous, Decaying Turbulence
Title | Numerical Studies of Dispersion Processes in Two-dimensional, Homogeneous, Decaying Turbulence PDF eBook |
Author | Anthony Daniel Kowalski |
Publisher | |
Pages | 248 |
Release | 1980 |
Genre | Dispersion |
ISBN |
Scientific and Technical Aerospace Reports
Title | Scientific and Technical Aerospace Reports PDF eBook |
Author | |
Publisher | |
Pages | 704 |
Release | 1995 |
Genre | Aeronautics |
ISBN |
Numerical Studies in Two-dimensional Turbulence
Title | Numerical Studies in Two-dimensional Turbulence PDF eBook |
Author | Fayeza Salim Sulti |
Publisher | |
Pages | |
Release | 2012 |
Genre | |
ISBN |
Two-dimensional turbulence has been extensively studied over the past years theoretically and numerically since the theory of the dual cascade energy. Numerical studies have revealed an impor- tant feature of two-dimensional turbulence, that is, the predomi- nance of coherent structures, followed by interaction and merger of these isolated vortices in the subsequent evolution. A method of 'vortex census' has been introduced to keep track of the vortices but the relation to reconnection has remained unexplored. In this Thesis, we study the reconnection process of vorticity con- tours associated with coherent vortices in two-dimensional turbu- lence for different Reynolds number. After checking topological integrity by the Euler index theorem, we make use of the critical points and their connectivity (so-called surface networks) to study the topological changes of vorticity contours. Wc show how this method can remarkably distinguish the dynamics of the vortic- ity field in the Navier-Stokes equations and that of the Charney- Hasegawa-Mima equation. We found that the potential vorticity formed vortex crystals. This excites us to study the vortex crystal in details by study a coarse-grained asymptotic equation [Smirnov and Chukbar(2001)]. Self-similar blow-up solutions with an infi- 1 I i :. nite total energy were given. We ask whether or not finite-time blow-up can take place developing from smooth initial data with a finite energy.
Dissertation Abstracts International
Title | Dissertation Abstracts International PDF eBook |
Author | |
Publisher | |
Pages | 884 |
Release | 2005 |
Genre | Dissertations, Academic |
ISBN |
American Doctoral Dissertations
Title | American Doctoral Dissertations PDF eBook |
Author | |
Publisher | |
Pages | 596 |
Release | 1979 |
Genre | Dissertation abstracts |
ISBN |
Turbulence Models and Their Application
Title | Turbulence Models and Their Application PDF eBook |
Author | Tuncer Cebeci |
Publisher | Springer Science & Business Media |
Pages | 140 |
Release | 2003-12-04 |
Genre | Science |
ISBN | 9783540402886 |
After a brief review of the more popular turbulence models, the author presents and discusses accurate and efficient numerical methods for solving the boundary-layer equations with turbulence models based on algebraic formulas (mixing length, eddy viscosity) or partial-differential transport equations. A computer program employing the Cebeci-Smith model and the k-e model for obtaining the solution of two-dimensional incompressible turbulent flows without separation is discussed in detail and is presented in the accompanying CD.
Studies in Turbulence
Title | Studies in Turbulence PDF eBook |
Author | Thomas B. Gatski |
Publisher | Springer Science & Business Media |
Pages | 609 |
Release | 2012-12-06 |
Genre | Science |
ISBN | 1461227925 |
This book contains contributions by former students, colleagues and friends of Professor John L. Lumley, on the occasion of his 60th birthday, in recognition of his enormous impact on the advancement of turbulence research. A variety of experimental, computational and theoretical topics, including turbulence modeling, direct numerical simulations, compressible turbulence, turbulent shear flows, coherent structures and the Proper Orthogonal Decomposition are contained herein. The diversity and scope of these contributions are further acknowledgment of John Lumley's wide ranging influence in the field of turbulence. The large number of contributions by the authors, many of whom were participants in The Lumley Symposium: Recent Developments in Turbulence (held at ICASE, NASA Langley Research Center on November 12 & 13, 1990), has presented us with the unique opportu nity to select a few numerical and theoretical papers for inclusion in the journal Theoretical and Computational Fluid Dynamics for which Professor Lumley serves as Editor. Extended Abstracts of these pa pers are included in this volume and are appropriately marked. The special issue of TCFD will appear this year and will serve as an additional tribute to John Lumley. As is usually the case, the efforts of others have significantly eased our tasks. We would like to express our deep appreciation to Drs. R.