Phenomenon · phenomenon:thermoacoustic-effect
Thermoacoustic effect
A sufficiently steep temperature gradient along a porous stack in a resonant gas column drives self-sustained acoustic oscillation. Heat becomes sound with no moving parts.
Atlas record: 8 claims reference this phenomenon — 5 established and 3 demonstrated.
Explorerelations · matrix context · routes · sources · cite
conditions: gas · temperature gradient required
8claims64enumerated routes3routes with complete-composition evidence5candidate routes not searched5cited sources
Relations
drives · 1
- temperature gradient along the stack steeper than the critical gradient set by the acoustic pressure and displacement amplitudes
- a resonant gas column
|∇T_crit| = β T_m ω |p₁| / (ρ_m c_p |u₁|); prime-mover onset requires |∇T| > |∇T_crit| · critical-gradient factor β T_m ω/(ρ_m c_p u₁) [K/(Pa·m)]
produces · 2
- travelling-wave thermoacoustic regime with a non-zero time-averaged acoustic power flux; pressure and particle velocity have the phase relation required for directed acoustic power (a looped tube or a travelling-wave regenerator), unlike the standing wave of a straight resonator
member of · 1
implemented by · 3
bounded by · 1
Matrix context
D = disequilibrium row · C = coupling family column. A cell reads the state of the atlas for that pair.
Enumerated routes through this · 64 (showing 24)
- Thermoacoustic piezoelectric harvester4/5 est · demonstrated
- Thermoacoustic triboelectric harvester4/5 est · demonstrated
- Thermoacoustic engine with linear alternator4/5 est · demonstrated
- Temperature gradient → Thermoacoustic effect → Acoustic wave → Acoustoelectric effect → Charge carriers → Electrical work3/5 est · unresolved handoff
- Temperature gradient → Thermoacoustic effect → Acoustic wave → Acoustoelectric effect → Charge carriers → Electrical work3/5 est · candidate
- Temperature gradient → Thermoacoustic effect → Acoustic wave → Direct piezoelectric effect → Separated surface charge → Electrical work4/5 est · extends a recorded pathway
- Temperature gradient → Thermoacoustic effect → Acoustic wave → Triboelectric effect → Separated surface charge → Electrical work4/5 est · extends a recorded pathway
- Temperature gradient → Thermoacoustic effect → Acoustic wave → Linear alternator action → Charge carriers → Electrical work4/5 est · extends a recorded pathway
- Chemical potential difference → Combustion → Temperature gradient → Thermoacoustic effect → Acoustic wave → Acoustoelectric effect → Charge carriers → Electrical work5/7 est · unresolved handoff
- Chemical potential difference → Combustion → Temperature gradient → Thermoacoustic effect → Acoustic wave → Direct piezoelectric effect → Separated surface charge → Electrical work6/7 est · extends a recorded pathway
- Chemical potential difference → Combustion → Temperature gradient → Thermoacoustic effect → Acoustic wave → Triboelectric effect → Separated surface charge → Electrical work6/7 est · extends a recorded pathway
- Chemical potential difference → Combustion → Temperature gradient → Thermoacoustic effect → Acoustic wave → Linear alternator action → Charge carriers → Electrical work6/7 est · extends a recorded pathway
- Chemical potential difference → Combustion → Temperature gradient → Thermoacoustic effect → Acoustic wave → Acoustoelectric effect → Charge carriers → Electrical work5/7 est · candidate
- Chemical potential difference → Combustion → Temperature gradient → Thermoacoustic effect → Acoustic wave → Direct piezoelectric effect → Separated surface charge → Electrical work6/7 est · extends a recorded pathway
- Chemical potential difference → Combustion → Temperature gradient → Thermoacoustic effect → Acoustic wave → Triboelectric effect → Separated surface charge → Electrical work6/7 est · extends a recorded pathway
- Chemical potential difference → Combustion → Temperature gradient → Thermoacoustic effect → Acoustic wave → Linear alternator action → Charge carriers → Electrical work6/7 est · extends a recorded pathway
- Electric potential difference → Peltier effect → Temperature gradient → Thermoacoustic effect → Acoustic wave → Acoustoelectric effect → Charge carriers → Electrical work5/7 est · same energy form
- Electric potential difference → Peltier effect → Temperature gradient → Thermoacoustic effect → Acoustic wave → Direct piezoelectric effect → Separated surface charge → Electrical work6/7 est · same energy form
- Electric potential difference → Peltier effect → Temperature gradient → Thermoacoustic effect → Acoustic wave → Triboelectric effect → Separated surface charge → Electrical work6/7 est · same energy form
- Electric potential difference → Peltier effect → Temperature gradient → Thermoacoustic effect → Acoustic wave → Linear alternator action → Charge carriers → Electrical work6/7 est · same energy form
- Electric potential difference → Peltier effect → Temperature gradient → Thermoacoustic effect → Acoustic wave → Acoustoelectric effect → Charge carriers → Electrical work5/7 est · same energy form
- Electric potential difference → Peltier effect → Temperature gradient → Thermoacoustic effect → Acoustic wave → Direct piezoelectric effect → Separated surface charge → Electrical work6/7 est · same energy form
- Electric potential difference → Peltier effect → Temperature gradient → Thermoacoustic effect → Acoustic wave → Triboelectric effect → Separated surface charge → Electrical work6/7 est · same energy form
- Electric potential difference → Peltier effect → Temperature gradient → Thermoacoustic effect → Acoustic wave → Linear alternator action → Charge carriers → Electrical work6/7 est · same energy form
Cited sources · 5
- [1]Y. Zheng et al.. Thermoacoustic energy harvesting using thermally-stabilized polyacrylonitrile nanofibers (2022)
- [2]Y. Li et al.. High-temperature energy harvesting via thermoacoustic-triboelectric hybridization: Design, modelling, and application demonstration (2026)
- [3]G. W. Swift. Thermoacoustic engines (1988)
- [4]T. Yazaki et al.. Traveling Wave Thermoacoustic Engine in a Looped Tube (1998)
- [5]S. Backhaus, G. W. Swift. A thermoacoustic-Stirling heat engine: Detailed study (2000)
Cite this entity
Physical Transformation Atlas (2026). entity phenomenon:thermoacoustic-effect: Thermoacoustic effect. Dataset revision rbfbfcbb70e57 (hash of the canonical data). https://physical-transformation-atlas.wldud5192.workers.dev/phenomenon/thermoacoustic-effect
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