Thermoviscous acoustic propagation in thin rough tubes
Résumé
Thermoviscous acoustic propagation in a tube with corrugated isothermal rigid walls is considered. At long wavelengths, it amounts to a 1D transmission line equation, in which the coefficients depend on the solution to a 2D diffusion problem. These coefficients are shown to display predictable behaviors at low, high, and intermediate frequencies. These results are demonstrated on a numerical example.
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