Dispersion and Absorption of Sound Waves in Liquids and Mixtures of Liquids

Sette, D.

doi:10.1007/978-3-642-45956-6_4

Cited by 15 publications

(8 citation statements)

References 6 publications

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“…Research papers about ultrasonic propagation velocity in these kinds of liquids can be found in the literature (Burton, 1948;Giacomini, 1947;Parshad, 1949;Sette, 1961). Ethanol-water mixtures show these molecular associations, which make the models unsuccessful, as it is clearly shown in Figs.…”

Section: Theoretical Modelsmentioning

confidence: 94%

“…Nomoto calculated this expression in a large number of mixtures of various kinds (Sette, 1961). He found that R has a linear form in many systems…”

Section: Theoretical Modelsmentioning

confidence: 99%

“…Moreover, Natta and Baccaredda assumed that the time needed for a mechanical pulse to pass through a mixture is the sum of the times which would be required to pass successively through two layers, each formed by one of the two components and having thickness proportional to the relative volume concentration (Sette, 1961). This gives the following equation:…”

Section: Theoretical Modelsmentioning

confidence: 99%

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Concentration control in alcoholic fermentation processes from ultrasonic velocity measurements

Resa

Elvira

Espinosa

2004

Food Research International

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Section: Theoretical Modelsmentioning

confidence: 94%

“…Nomoto calculated this expression in a large number of mixtures of various kinds (Sette, 1961). He found that R has a linear form in many systems…”

Section: Theoretical Modelsmentioning

confidence: 99%

Section: Theoretical Modelsmentioning

confidence: 99%

See 1 more Smart Citation

Concentration control in alcoholic fermentation processes from ultrasonic velocity measurements

Resa

Elvira

Espinosa

2004

Food Research International

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“…exp ( --e/k T) (1) (S,=Sutherland's constant for the gaseous viscosity, e = depth of the Lennard-Jones potential). Eq.…”

Section: /T) Exp (-E/k T)mentioning

confidence: 99%

“…For a large number of gases and liquids the excess of sound absorption over its "classical" value (mainly determined by the shear viscosity) is due to the vibrational specific heat (Ci) of the molecules [1]. The relaxation time (r) of Ci depends upon the number of binary collisions a molecule undergoes per unit time (F) and the probability (P) that such a collision effects an energy transfer between the translational and the vibrational degrees of freedom: ~ = (F. P)-1.…”

Section: /T) Exp (-E/k T)mentioning

confidence: 99%

Collisional transition probability in gaseous and liquid carbontetrachloride

Sedlacek

1975

Z Physik A

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Abstract.In gaseous CC14 at 20 to 30 ~ the probability that a binary collision effects an energy transfer between the translational and the vibrational degrees of freedom is 3.8.10 -3, in liquid CC14 at the same temperature it is close to 2.6-10 -3. The ratio of these experimental values corresponds exactly to that predicted from the theoretical /T). exp (-e/k T).For a large number of gases and liquids the excess of sound absorption over its "classical" value (mainly determined by the shear viscosity) is due to the vibrational specific heat (Ci) of the molecules [1]. The relaxation time (r) of Ci depends upon the number of binary collisions a molecule undergoes per unit time (F) and the probability (P) that such a collision effects an energy transfer between the translational and the vibrational degrees of freedom: ~ = (F. P)-1. Because of the effect of the long range attractive forces, the collisional transition probability in a gas of moderate density is higher than in a highly compressed gas or in a liquid of the same chemical composition. The ratio of Pliquid to Pgas is given by a relationship which has been derived by Litovitz from the isolated binary collision theory for the vibrational relaxation [-2, 3] :

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Über den Struktureffekt unpolarer Teilchen in wäßriger Lösung Zusammenfassender Bericht

Hertz

1964

Ber Bunsenges Phys Chem

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Der Prüfung der Hypothese Franks, daß unpolare Teilchen in wäßriger Lösung in Form der sogenannten Eisbergbildung hydratisiert sind, wird ein Vorschlag zur begrifflichen Präzisierung der im allgemeinen intuitiv gebrauchten Bezeichnungen Strukturvermehrung bzw. ‐verminderung vorausgeschickt. Der Strukturgrad ist hiernach charakterisiert durch die Schärfe der Maxima verschiedener orientierungsabhängiger molekularer Verteilungsfunktionen. Da ein exakter Beweis für eine Strukturvermehrung nicht zu erbringen ist, werden folgende physikalisch‐chemische Eigenschaften wäßriger Lösungen von Molekülen mit Alkylgruppen im Hinblick auf eine mögliche Strukturaussage diskutiert: Thermodynamische Eigenschaften inkl. Gashydratbildung, Zähigkeit, elektrische Leitfähigkeit, dielektrische und kernmagnetische Relaxationszeit, chemische Verschiebung der Kernresonanzlinie, Schallabsorption und Schallgeschwindigkeit, Wärmeleitfähigkeit und diamagnetische Suszeptibilität. Das Ergebnis läßt sich folgendermaßen zusammenfassen: Gewisse Eigenschaften zeigen, daß eine Strukturzunahme vorhanden ist, andere Beobachtungen geben zu erkennen, daß die Zahl der Wasserstoff‐Brückenbindungen in der Lösung abnimmt. Es folgt somit, daß die Strukturvermehrung so beschaffen ist, daß dabei ein Abbau oder eine Deformation der H‐Brücken stattfindet.

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Dispersion and Absorption of Sound Waves in Liquids and Mixtures of Liquids

Cited by 15 publications

References 6 publications

Concentration control in alcoholic fermentation processes from ultrasonic velocity measurements

Concentration control in alcoholic fermentation processes from ultrasonic velocity measurements

Collisional transition probability in gaseous and liquid carbontetrachloride

Über den Struktureffekt unpolarer Teilchen in wäßriger Lösung Zusammenfassender Bericht

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