Hysteresis curves and loops for harmonic and impulse perturbations in some non-equilibrium gases

• Authors: Anna Perelomova
• Languages of publication: EN

Abstracts

EN

Evolution of sound in a relaxing gas whose properties vary in the course of wave propagation, is studied. A relaxing medium may reveal normal acoustic properties or be acoustically active. In the first case, losses in acoustic energy lead to an increase in internal energy of a gas similarly as it happens in Newtonian fluids. In the second case, acoustic energy increases in the course of sound propagation, and the internal energy of a medium decreases. Variations in the internal energy of a gas are proportional to some generic parameter, the sign of which is responsible for acoustical activity, and depends on intensity and shape of the sound waveform. Hysteresis curves in the plane of thermodynamic states are plotted. Curves for harmonic and several aperiodic sound impulses are plotted, discussed and compared.

Keywords

EN

hysteresis; non-equilibrium gases; thermodynamic relaxation

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2013
• Volume: 11
• Issue: 11
• Pages: 1541-1547

Dates

published

1 - 11 - 2013

online

10 - 12 - 2013

Contributors

author

Anna Perelomova

• Gdansk University of Technology, Faculty of Applied Physics and Mathematics, ul. Narutowicza 11/12, 80-233, Gdansk, Poland

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Identifiers

DOI

10.2478/s11534-013-0305-2