Journal article
Experimental and numerical investigations of resonant acoustic waves in near-critical carbon dioxide
The Journal of the Acoustical Society of America, v 138(4), pp 2414-2425
Oct 2015
PMID: 26520322
Abstract
Flow and transport induced by resonant acoustic waves in a near-critical fluid filled cylindrical enclosure is investigated both experimentally and numerically. Supercritical carbon dioxide (near the critical or the pseudo-critical states) in a confined resonator is subjected to acoustic field created by an electro-mechanical acoustic transducer and the induced pressure waves are measured by a fast response pressure field microphone. The frequency of the acoustic transducer is chosen such that the lowest acoustic mode propagates along the enclosure. For numerical simulations, a real-fluid computational fluid dynamics model representing the thermo-physical and transport properties of the supercritical fluid is considered. The simulated acoustic field in the resonator is compared with measurements. The formation of acoustic streaming structures in the highly compressible medium is revealed by time-averaging the numerical solutions over a given period. Due to diverging thermo-physical properties of supercritical fluid near the critical point, large scale oscillations are generated even for small sound field intensity. The strength of the acoustic wave field is found to be in direct relation with the thermodynamic state of the fluid. The effects of near-critical property variations and the operating pressure on the formation process of the streaming structures are also investigated. Irregular streaming patterns with significantly higher streaming velocities are observed for near-pseudo-critical states at operating pressures close to the critical pressure. However, these structures quickly re-orient to the typical Rayleigh streaming patterns with the increase operating pressure.
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Details
- Title
- Experimental and numerical investigations of resonant acoustic waves in near-critical carbon dioxide
- Creators
- Nusair Hasan - Mechanical Engineering and Mechanics, Drexel University, Philadelphia, Pennsylvania 19014, USABakhtier Farouk - Mechanical Engineering and Mechanics, Drexel University, Philadelphia, Pennsylvania 19014, USA
- Publication Details
- The Journal of the Acoustical Society of America, v 138(4), pp 2414-2425
- Publisher
- United States
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000368186600053
- Scopus ID
- 2-s2.0-84945934123
- Other Identifier
- 991014877714004721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Acoustics
- Audiology & Speech-language Pathology