Global Flow Instability and Control IV Held in Crete, Greece on September 28-October 2, 2009: A Synthesis of Presentations and Discussions.

摘要

The Final Proceedings for Fourth Symposium on Global Flow Instability and Control, Hersonissos, Crete, Greece, on 28 September 2009 - 2 October 2009. The series of symposia was established in 2001, having as its primary objective the creation of a forum for presentation and discussion of current research and open issues in global flow instability and control. This has been particularly interesting in recent years in view of the increasing adoption by the community of instability analysis and theoretical flow control approaches based on the pertinent two- and three-dimensional partial-derivative eigenvalue problems. Focus was again placed on advances in theory, numerical algorithms, and experiment, which enable identification and control of fluid flow global instabilities in real-world applications. Highlights of this year's edition of the symposium have included discussion of enabling technologies for complex flow instability analysis and control, as well as the connection of results of the new theory to known (from a physical point of view) applications to weakly-nonparallel flows. In addition, nonlinear global instability analyses were presented, as were novel flow control (theoretical) ideas and practical implementations. As planned by the Organizing Committee, topics discussed included: 1) Global instability and control of flows, the basic state of which is inhomogeneous in two or all three spatial directions; 2) Experimental and computational investigations and demonstrations of open and closed-loop control; 3) Theoretical, computational, and experimental work on transient growth in such flows, and in particular the relation of transient growth to flow control; 4) Flow control methodologies, including optimal control, adjoint-based methods, and reduced-order modeling; and 5) Accurate and efficient algorithms for the numerical solution of large (partial-derivative) eigenvalue problems and direct numerical simulation.