RET of Dense Polyatomic Gas with Six Fields

2020 ◽  
pp. 465-487
Author(s):  
Tommaso Ruggeri ◽  
Masaru Sugiyama
Keyword(s):  
Polyatomic Gas ◽  
Dense Polyatomic Gas

Analytical model for polyatomic gas expansion under pulsed evaporation

2008 ◽  
Vol 20 (2) ◽  
pp. 027103 ◽  
Author(s):  
A. A. Morozov
Keyword(s):  
Analytical Model ◽  
Polyatomic Gas ◽  
Gas Expansion

scholarly journals Reconstruction algorithm of relaxation attenuation spectrum in polyatomic gas

2008 ◽  
Vol 57 (7) ◽  
pp. 4282
Author(s):  
Yan Shu ◽  
Wang Shu
Keyword(s):  
Reconstruction Algorithm ◽  
Polyatomic Gas

Sound Propagation in Dilute Polyatomic Gases

1972 ◽  
Vol 27 (4) ◽  
pp. 583-592
Author(s):  
H. Moraal ◽  
F. Mccourt
Keyword(s):  
Pressure Range ◽  
Sound Propagation ◽  
Plane Waves ◽  
Point Of View ◽  
Perturbation Function ◽  
Sound Waves ◽  
Polyatomic Gas ◽  
Measured Pressure ◽  
Theory And Experiment ◽  
Good Agreement

Abstract Sound propagation in dilute pure gases, both monatomic and polyatomic, has been considered from the point of view of the Waldmann-Snider equation. It is shown that the commonly employed assumption that sound propagation in gases is equivalent to the propagation of plane waves is valid only in the region where collisions restore equilibrium faster than it is perturbed by the sound waves. A systematic truncation procedure for an expansion of the perturbation function in irreducible Cartesian tensors is introduced and then illustrated in solutions for three specific kinds of molecules, helium, nitrogen and rough spheres. The agreement between theory and experiment is rather good for sound absorption in the region where the ratio of the collision and sound frequencies is greater than 1.5. The agreement in the case of dispersion is good over the whole measured pressure range. One useful result obtained is to show the polyatomic gas calculations in second approximation have as good agreement with experiment as the calculations for noble gases in third approximation. This can be related to the possession by the polyatomic gas of a bulk viscosity which dominates in sound propagation.

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