000014038 001__ 14038
000014038 005__ 20161115094009.0
000014038 04107 $$aeng
000014038 046__ $$k2016-08-21
000014038 100__ $$aSugimoto, Nobumasa
000014038 24500 $$aAsymptotic theories of nonlinear thermoacoustic waves in a gas-filled channel

000014038 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014038 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014038 506__ $$arestricted
000014038 520__ $$2eng$$aThis paper introduces two asymptotic theories for nonlinear thermoacoustic waves in a gas—filled channel subject to temperature gradient. On the basis of a narrow—tube approximation, the theories exploit, as an asymptotic parameter, the ratio of a typical thickness of thermoviscous diffusion layer to a channel width. If the ratio is large enough, thermoviscous effects are confined in a boundary layer so that they affect lossless propagation in a core outside of the boundary layer through a velocity component normal to the channel wall at the outer edge of the boundary layer. If the ratio is small enough, propagation is described by a nonlinear diffusion—wave (advection) equation. Even for an intermediate value of the ratio, it is expected that either asymptotic theory will be able to describe propagation of nonlinear thermoacoustic waves.

000014038 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014038 653__ $$a

000014038 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014038 720__ $$aSugimoto, Nobumasa
000014038 8560_ $$ffischerc@itam.cas.cz
000014038 8564_ $$s175048$$uhttps://invenio.itam.cas.cz/record/14038/files/PO.FS01-1.08.333.pdf$$yOriginal version of the author's contribution as presented on CD, XMLout( page 3087, code PO.FS01-1.08.333).
000014038 962__ $$r13812
000014038 980__ $$aPAPER