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Principio Variacional Termodinámico que Unifica la Gravedad y el Flujo de Calor
Naoko Nakagawa1, Shin-Ichi Sasa2
1Ibaraki University, Department of Physics, Mito 310-8512, Japan.
Physical review letters
|February 22, 2026
Resumen
Predecir configuraciones de líquido-gas bajo gravedad y flujo de calor conflictivos es un desafío. Un nuevo marco de termodinámica global unifica estos efectos en una "gravedad efectiva" (g_eff), que determina las disposiciones estables de las fases.
Área de la Ciencia:
- Termodinámica
- Dinámica de fluidos
- Transiciones de fase
Sus antecedentes:
- La termodinámica de equilibrio estándar falla para estados estacionarios fuera de equilibrio.
- Predecir configuraciones de líquido-gas es difícil cuando la gravedad y el flujo de calor entran en conflicto.
Objetivo del estudio:
- Desarrollar un marco para predecir configuraciones de fase estables en sistemas líquido-gas bajo impulsos competitivos.
- Abordar problemas de selección de estado en estados estacionarios fuera de equilibrio.
Principales métodos:
- Se propuso un principio variacional basado en la termodinámica extendida, denominada termodinámica global.
- Se unificaron los efectos de la gravedad y el flujo de calor en un solo parámetro, la gravedad efectiva (g_eff).
Principales resultados:
- El signo de la gravedad efectiva (g_eff) dicta la configuración estable.
- g_eff > 0 indica líquido en la parte inferior; g_eff < 0 indica líquido sobre el gas.
Conclusiones:
- La termodinámica global ofrece una herramienta cuantitativa para predecir configuraciones de fase bajo influencias competitivas.
- El parámetro de gravedad efectiva proporciona un enfoque novedoso para comprender el comportamiento de los sistemas fuera de equilibrio.
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