Nonlinear Influence of Sound on the Vibrational Energy of Molecules in a Relaxing Gas
Dynamics of a weakly nonlinear and weakly dispersive flow of a gas where molecular vibrational relaxation takes place is studied. Variations in the vibrational energy in the field of intense sound is considered. These variations are caused by a nonlinear transfer of the acoustic energy into energy...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
| Published: |
Institute of Fundamental Technological Research Polish Academy of Sciences
2013-10-01
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| Series: | Archives of Acoustics |
| Subjects: | |
| Online Access: | https://acoustics.ippt.pan.pl/index.php/aa/article/view/131 |
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| Summary: | Dynamics of a weakly nonlinear and weakly dispersive flow of a gas where molecular vibrational
relaxation takes place is studied. Variations in the vibrational energy in the field of intense sound is
considered. These variations are caused by a nonlinear transfer of the acoustic energy into energy of
vibrational degrees of freedom in a relaxing gas. The final dynamic equation which describes this is
instantaneous, it includes a quadratic nonlinear acoustic source reflecting the nonlinear character of
interaction of high-frequency acoustic and non-acoustic motions in a gas. All types of sound, periodic or
aperiodic, may serve as an acoustic source. Some conclusions about temporal behavior of the vibrational
mode caused by periodic and aperiodic sounds are made. |
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| ISSN: | 0137-5075 2300-262X |