Determination of thermophysical properties of materials with the help of characteristics of imaginary frequencies

1991 ◽  
Vol 61 (1) ◽  
pp. 922-926
Author(s):  
A. V. Kozlov ◽  
A. G. Shashkov ◽  
A. S. Trofimov
Keyword(s):  
Thermophysical Properties ◽  
Properties Of Materials

A comprehensive investigation in determination of nanofluids thermophysical properties

2021 ◽  
Vol 98 (3) ◽  
pp. 100037
Author(s):  
Sajjad Porgar ◽  
Leila Vafajoo ◽  
Nader Nikkam ◽  
Gholamreza Vakili-Nezhaad
Keyword(s):  
Thermophysical Properties ◽  
Comprehensive Investigation

Experimental determination of the thermophysical properties of Water-Xylitol mixtures

1993 ◽  
Vol 7 (1) ◽  
pp. 80-86 ◽  
Author(s):  
Mauro Felli ◽  
Franco Cotana ◽  
Federico Rossi
Keyword(s):  
Experimental Determination ◽  
Thermophysical Properties

Application of computational thermodynamics to the determination of thermophysical properties as a function of temperature for multicomponent Al-based alloys

2015 ◽  
Vol 619 ◽  
pp. 1-7 ◽  
Author(s):  
Fabiana C. Nascimento ◽  
Mara C.C. Paresque ◽  
José A. de Castro ◽  
Paulo A.D. Jácome ◽  
Amauri Garcia ◽  
...  
Keyword(s):  
Thermophysical Properties ◽  
Computational Thermodynamics

Method of Testing of Sound Absorption Properties of Materials Intended for Ultrasonic Noise Protection

2013 ◽  
Vol 38 (2) ◽  
pp. 191-195 ◽  
Author(s):  
Dariusz Pleban
Keyword(s):  
Sound Absorption ◽  
Free Field ◽  
Tone Burst ◽  
Mineral Wool ◽  
Frequency Range ◽  
Absorption Properties ◽  
Open Cell Foam ◽  
Properties Of Materials ◽  
Cell Foam

Abstract Efficient ultrasonic noise reduction by using enclosures requires the knowledge of absorbing properties of materials in the frequency range above 4 kHz. However, standardized methods enable determination of absorption coefficients of materials in the frequency range up to 4 kHz. For this reason, it is proposed to carry out measurements of the sound absorption properties of materials in the free field by means of a tone-burst technique in the frequency range from 4 kHz to 40 kHz at angles of incidence varying from 0° to 60°. The absorption coefficient of a material is calculated from the reflection coefficient obtained by reflecting a tone-burst from both a perfectly reflecting panel and a combination of this panel and the sample of the tested material. The tests results show that mineral wool and polyurethane open-cell foam possess very good absorbing properties in this frequency range.

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