Measurement of the Ultrasonic Absorption Coefficient by a Modified Radiation Pressure Method

A polymer blends (PVA/PEG) have been prepared at various concentrations(6%, 8%, 10%, 12%, and 14%) g /ml by dissolving different weights from the powders{Pva and Peg}.The behavior of this mixture has been studied utilize some physical properties such as ultrasonic absorption coefficient, relaxation amplitude, specific acoustic Impedance, compression, bulk modulus, shear viscosity, and Reduced viscosity. The outcomes referenced that each of these characteristics increased with increasing concentration of polymeric solutions, "while compressibility decreased with increasing concentration solutions".

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Determination of Ultrasonic Absorption Coefficient by Optical Holography

The Journal of the Acoustical Society of America ◽

10.1121/1.1974697 ◽

1970 ◽

Vol 47 (1A) ◽

pp. 73-73

Author(s):

A. Alippi ◽

L. Palmieri

Keyword(s):

Absorption Coefficient ◽

Ultrasonic Absorption

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Effects of divalent cations on the ultrasonic absorption coefficient of negatively charged liposomes (LUV) near their phase transition temperature

Biochimica et Biophysica Acta (BBA) - Biomembranes ◽

10.1016/0005-2736(87)90294-x ◽

1987 ◽

Vol 902 (2) ◽

pp. 183-192 ◽

Cited By ~ 7

Author(s):

Loralie D. Ma ◽

Richard L. Magin ◽

Floyd Dunn

Keyword(s):

Phase Transition ◽

Transition Temperature ◽

Absorption Coefficient ◽

Phase Transition Temperature ◽

Divalent Cations ◽

Ultrasonic Absorption

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Determination of ultrasonic absorption coefficient by means of acoustic streaming: the need to consider the effect of diffraction on streaming velocity

Measurement Science and Technology ◽

10.1088/0957-0233/1/10/015 ◽

1990 ◽

Vol 1 (10) ◽

pp. 1084-1086

Author(s):

K M Quan ◽

D J Watmough

Keyword(s):

Absorption Coefficient ◽

Acoustic Streaming ◽

Ultrasonic Absorption ◽

Streaming Velocity

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Determination of the ultrasonic absorption coefficient of benzol with thermal method

Il Nuovo Cimento ◽

10.1007/bf02855213 ◽

1955 ◽

Vol 1 (4) ◽

pp. 525-526 ◽

Cited By ~ 3

Author(s):

E. Grossetti

Keyword(s):

Absorption Coefficient ◽

Thermal Method ◽

Ultrasonic Absorption

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Acoustic streaming in liquids

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1954.0232 ◽

1954 ◽

Vol 226 (1164) ◽

pp. 43-50 ◽

Cited By ~ 29

Keyword(s):

Absorption Coefficient ◽

Radiation Pressure ◽

Sound Absorption ◽

Stokes Equations ◽

Acoustic Streaming ◽

Navier Stokes ◽

Navier Stokes Equations ◽

Yield Information ◽

Streaming Velocity ◽

Coefficient Of Viscosity

It has been suggested by Eckart (1948), Liebermann (1949) and others that measurement of acoustic streaming in a fluid provides an independent means of evaluating the ratio of the second coefficient of viscosity to the coefficient of shear viscosity. Arguments are put forward here to support the view (Nyborg 1953) that the streaming velocity is directly dependent on the coefficient of sound absorption. The second coefficient of viscosity influences the velocity of streaming only through its relationship to the coefficient of sound absorption. It is concluded that measurements of streaming velocity do not yield information about the second coefficient of viscosity other than may be obtained from the direct measurement of sound absorption. The theory of streaming based on the gradient of radiation pressure has been established quantitatively by a solution of the Navier-Stokes equations. A description is given of a method of determining the sound-absorption coefficient of a liquid from measurements of the velocity of streaming, and some typical results are stated.

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