title: Cover Images: Flow Visualization.
abstract: Flow visualization is most often the 'first tool' used by investigators in their quest for understanding turbulent and other unsteady flow phenomena. The authors explain photography with the smoke-wire technique that has become an art form.
authors.affiliation: Illinois Institute of Technology and Wind Flow Photography, Chicago, IL.
authors.forename: Candace
authors.initials: C
authors.lastname: Wark
authors.affiliation: Wind Flow Photography, Chicago, IL.
authors.forename: Shirley
authors.initials: S
authors.lastname: Nannini