An Experimental Determination of Ultrasonic Absorption and Reflection Coefficients in Air and in Carbon Dioxide

Curtis, R.W.

doi:10.1103/physrev.46.811

Cited by 19 publications

(2 citation statements)

References 10 publications

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“…The attenuation predicted by this classical theory corresponds ostensibly well with low frequency acoustic measurements. Subsequently performed ultrasonic measurements, [53][54][55][56][57] however, disclosed large deviations from the classical description (5) and motivated Herzfeld 58 and Kneser 59,60 to introduce an additional mechanism,…”

Section: Sound Attenuationmentioning

confidence: 99%

Bulk viscosity of liquid noble gases

Chatwell

Vrabec

2020

The Journal of Chemical Physics

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An equation of state for the bulk viscosity of liquid noble gases is proposed. On the basis of dedicated equilibrium molecular dynamics simulations, a multi-mode relaxation ansatz is used to obtain precise bulk viscosity data over a wide range of liquid states. From this dataset, the equation of state emerges as a two-parametric power function with both parameters showing a conspicuous saturation behavior over temperature. After passing a temperature threshold, the bulk viscosity is found to vary significantly over density, a behavior that resembles the frequency response of a one pole low-pass filter. The proposed equation of state is in good agreement with available experimental sound attenuation data.

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Section: Sound Attenuationmentioning

confidence: 99%

Bulk viscosity of liquid noble gases

Chatwell

Vrabec

2020

The Journal of Chemical Physics

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“…However, measurements in helium by van Itterbeek and Thys (1938L), van Itterbeek and Mariens (1940 c), and Curtis (1934), and in neon by van Itterbeek and Thys (1938b) indicate that the absorption in these two gases exceeds the theoretical value by a factor of the order of four. Pumper (1939) has measured the absorption in helium as a function of pressure and finds that the theoretical absorption is verified from the slope of the plot of absorption against (1 pressure), but that the observed value of the absorption at any pressure is greater than the theoretical value.…”

Section: (Viii) Present Status Of Nieasurenzents In Gasesmentioning

confidence: 92%

Ultrasonics research and the properties of matter

Kittel

1947

Rep. Prog. Phys.

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Untersuchungen über die kinetische Theorie der Gase I. Schallabsorption

Herzfeld

1935

Annalen der Physik

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Die Absorption von Schall in Gasen wurde zuerst von K i r c hhoff und Stokes') auf Grund der Reibung und Warmeleitung erklart. Fur den speziellen Fall eines dissoziierenden Gases hat E i n s t ein2) den EinfluB der endlichen Reaktionsgeschwindigkeit beriicksichtigt. H e r z f e l d und Rice3) haben aufierdem zur Erklarung die Langsamkeit des Energieaustausches mit den inneren Freiheitsgraden herangezogen, und zahlreiche theoretische und experimentelle Arbeiten haben sich angeschl~ssen~).Neuere Srbeiten 6, aber scheinen anzudeuten, daB selbst in Helium die Absorption groBer ist, als man nach der Warmeleitung und Viskoeitat erwarten sollte, und da es in diesem einatomigen Gas keine inneren Freiheitsgrade gibt, muB man nach einer anderen Erklarung suchen.In dieser Arbeit wird untersucht, ob das Geschwindigkeitsgefalle bei diesem ProzeB so hoch ist, dab man Abweichungen von der Gasgleichung erwarten mnB.Die hydrodynamischen Gleichungen f iir die makroskopische Bewegung yon Gasen sind von H. A. Lorentze) theoretisch auf Grund der kinetischen Theorie abgeleitet worden, aber die Effekte, die hier untersucht werden sollen, sind dort explizit vernachlassigt worden. I n einer BuBerst interessanten Arbeit hat M. Brillouin') die nachste Annaherung entwickelt, namlich die Bewegungsgleichung 1) C. G. Stokes, Trans. Cambr.

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An Experimental Determination of Ultrasonic Absorption and Reflection Coefficients in Air and in Carbon Dioxide

Cited by 19 publications

References 10 publications

Bulk viscosity of liquid noble gases

Bulk viscosity of liquid noble gases

Ultrasonics research and the properties of matter

Untersuchungen über die kinetische Theorie der Gase I. Schallabsorption

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