| Issue |
Europhys. Lett.
Volume 60, Number 3, November I 2002
|
|
|---|---|---|
| Page(s) | 363 - 368 | |
| Section | Electromagnetism, optics, acoustics, heat transfer, classical mechanics and fluid dynamics | |
| DOI | https://doi.org/10.1209/epl/i2002-00273-1 | |
| Published online | 01 October 2002 | |
Thermodynamical mode selection rule observed in thermoacoustic oscillations
1
Department of Crystalline Materials Science,
Nagoya University Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
2
Department of Physics, Aichi University of Education
Kariya, 448-8542, Japan
Received:
7
January
2002
Accepted:
12
August
2002
A gas column in a tube with a temperature gradient spontaneously begins to oscillate when it is driven away from equilibrium. We observed a transition from the standing- to the traveling-acoustic-wave modes through a quasiperiodic state using a looped tube attached to a resonator. Through the measurements of entropy flow, we experimentally propose a thermodynamical mode selection rule, which acts as a guiding principle for a sequence of unstable modes appearing in nonequilibrium systems.
PACS: 43.35.Ud – Thermoacoustics, high temperature acoustics, photoacoustic effect / 05.70.Ln – Nonequilibrium and irreversible thermodynamics
© EDP Sciences, 2002
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