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Prof. Michel Bruneau: Acoustics in thermo?viscous fluids: fundamentals and applications

17.09.2014   14:00-16:00

We ordinarily think of an acoustic wave in a gas as consisting of coupled pressure and displacement oscillations. However, temperature oscillations and shear movements always accompany the pressure oscillations, more specifically near the walls where both interact with the acoustic movement (inside the viscous and thermal boundary layers). The combination of all these oscillations and their interactions with solid boundaries produce a variety of effects.

Although these effects as they occur in everyday life are too small to be noticed, they need to be modelled carefully in a lot of applications (microphones, loudspeakers, headphones, earplugs, acoustic fibrous and porous materials, wave-guides and cavities, properties of gas/liquid mixtures measurements, and so on), and even they are able to produce powerful engines (thermo-acoustic engine, acoustic refrigerator, acoustic gyrometer).

Místo konání
T2:C3-54
Kontaktní osoba
prof. Ondřej Jiříček, jiricek@fel.cvut.cz, + 2 2435 2310
Příloha
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