Abstract
Near the liquid-gas critical point, thermal disturbances can generate sounds. We study the acoustic emission over four decades of reduced temperatures [defined as ε=(T-Tc)/Tc, with Tc the critical temperature] along the critical isochore, under linear and nonlinear temperature perturbations, respectively. We identify various thermoacoustic behaviors by numerically solving the governing equations. It is shown that a homogeneous thermoacoustic-wave pattern dominates in the linear case, largely independent of ε; whereas under the nonlinear perturbation, variation in ε could lead to severe wavefront deformation. The strong nonlinear effect is found to be of a transient nature because, in due time, both cases tend to converge in terms of the energy yield of the adiabatic process.
| Original language | English |
|---|---|
| Article number | 011115 |
| Journal | Physical Review E - Statistical, Nonlinear, and Soft Matter Physics |
| Volume | 83 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jan 21 2011 |
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All Science Journal Classification (ASJC) codes
- Statistical and Nonlinear Physics
- Statistics and Probability
- Condensed Matter Physics
Cite this
Thermoacoustic waves along the critical isochore. / Shen, Biao; Zhang, P.
In: Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, Vol. 83, No. 1, 011115, 21.01.2011.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Thermoacoustic waves along the critical isochore
AU - Shen, Biao
AU - Zhang, P.
PY - 2011/1/21
Y1 - 2011/1/21
N2 - Near the liquid-gas critical point, thermal disturbances can generate sounds. We study the acoustic emission over four decades of reduced temperatures [defined as ε=(T-Tc)/Tc, with Tc the critical temperature] along the critical isochore, under linear and nonlinear temperature perturbations, respectively. We identify various thermoacoustic behaviors by numerically solving the governing equations. It is shown that a homogeneous thermoacoustic-wave pattern dominates in the linear case, largely independent of ε; whereas under the nonlinear perturbation, variation in ε could lead to severe wavefront deformation. The strong nonlinear effect is found to be of a transient nature because, in due time, both cases tend to converge in terms of the energy yield of the adiabatic process.
AB - Near the liquid-gas critical point, thermal disturbances can generate sounds. We study the acoustic emission over four decades of reduced temperatures [defined as ε=(T-Tc)/Tc, with Tc the critical temperature] along the critical isochore, under linear and nonlinear temperature perturbations, respectively. We identify various thermoacoustic behaviors by numerically solving the governing equations. It is shown that a homogeneous thermoacoustic-wave pattern dominates in the linear case, largely independent of ε; whereas under the nonlinear perturbation, variation in ε could lead to severe wavefront deformation. The strong nonlinear effect is found to be of a transient nature because, in due time, both cases tend to converge in terms of the energy yield of the adiabatic process.
UR - http://www.scopus.com/inward/record.url?scp=79951690208&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79951690208&partnerID=8YFLogxK
U2 - 10.1103/PhysRevE.83.011115
DO - 10.1103/PhysRevE.83.011115
M3 - Article
AN - SCOPUS:79951690208
VL - 83
JO - Physical Review E
JF - Physical Review E
SN - 2470-0045
IS - 1
M1 - 011115
ER -