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DY: Dynamik und Statistische Physik

DY 34: Poster

DY 34.76: Poster

Monday, March 7, 2005, 15:30–18:00, Poster TU D

Striations in Kundt’s tube filled with water — •A. Langenbucher, C.A. Krülle, and I. Rehberg — Experimentalphysik V, Universität Bayreuth, D-95440 Bayreuth

Kundt’s tube is a well-known device for demonstrating standing sound waves where dust particles assemble at the nodal lines. In between, the accumulation of dust is not homogeneously distributed but shows sharp parallel stripes, which are known as "striations" (E.N. da C. Andrade, Trans. Roy. Soc. A 230, 413 (1932)). Most works on this phenomenon were done with air as driving fluid. Here we report on first results on the hydrodynamic behavior in a water-filled tube, which is exposed to an oscillating flow generated by a vibrating piston. The observed pattern formation is due to the hydrodynamic interaction of a small amount of glass beads with the surrounding fluid.