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| Von Karman Vortex Street |
BLARNEY IN CONCERT
CONCERT CANCELLED
DUE TO ILLNESS
NEW DATE TO BE ANNOUNCED.
When a fluid such as air or water flows past a small obstruction, the flow oscillates up and down at a particular frequency, each deflection forming a circular vortex in the fluid. This chain of alternating vortices is called a
Von Karman vortex street after
Theodore von Karman, the Hungarian-born physicist who first characterized this particularly beautiful and common natural phenomenon which takes place, for instance, when water waves move past an island or air moves across an airplane wing. The oscillation of air as it moves past a small obstruction also forms the basis of certain wind instruments such as the flute and the whistle.
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| Nick producing Van Karman streets using a black aluminum "Guinness" whistle |
By attaching a resonant tube to the fluid obstruction and manipulating its length, the frequency of the von Karman street can be coaxed into the audible range and a certain sort of music produced which some find enjoyable. This music can be experienced solo but is considerably enhanced by the presence of other instruments producing sound by other physical means.
On Sunday, Feb 19, the Santa Cruz Art League (located at 526 Broadway) is hosting a concert (5 to 7 PM) of Irish music by the band
Blarney featuring two vortex street musicians, Kim Fulton-Bennett on the Irish wooden flute and Nick Herbert on the Irish penny whistle. Their von-Karman-based melodies will be augmented by Matt Johnson on banjo and
gittern and August O'Connor on
bodhran (Irish frame drum) and guitar. Wine and snacks served at intermission and an open gallery featuring various imaginative representations of the human body (
The Figure Contemporary) will add to your enjoyment. Details available at
the Santa Cruz Art League website. More about
Blarney here.
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| Blarney on Broadway: Matt, August, Kim and Nick |
