title: Something old, something new.
abstract: Some thoughts on the development of theoretical fluid dynamics in this century and some reflections on the developments of the past century were provided as an introduction to a broad-ranging conference. A written synopsis of these remarks is provided here.
authors.affiliation: Center for Fluid Dynamics, Technical University of Denmark, 2800 Lyngby, Denmark. haref@vt.edu
authors.forename: Hassan
authors.initials: H
authors.lastname: Aref