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El inicio de la turbulencia en el flujo de tubería
Kerstin Avila1, David Moxey, Alberto de Lozar
1Max Planck Institute for Dynamics and Self-Organization, Göttingen, Germany. kavila@ds.mpg.de
Science (New York, N.Y.)
|July 9, 2011
Resumen
La turbulencia transitoria en el flujo de tubería se mantiene en un número crítico de Reynolds. La propagación espacial de los dominios caóticos, no la complejidad temporal, impulsa esta turbulencia de fluidos.
Área de la Ciencia:
- Dinámica de fluidos La dinámica de fluidos.
- La teoría de la turbulencia es la teoría de la turbulencia.
Sus antecedentes:
- Los flujos de cizallamiento pasan de un movimiento laminar a un movimiento turbulento con una velocidad creciente.
- El inicio de la turbulencia altera significativamente la eficiencia del transporte y la mezcla.
- El número crítico de Reynolds para la turbulencia sostenida en el flujo de tuberías sigue siendo elusivo.
Objetivo del estudio:
- Identificar y caracterizar los procesos responsables de mantener la turbulencia en el flujo de tuberías.
- Para determinar el punto crítico en el que la turbulencia transitoria se vuelve sostenida.
- Para contrastar los mecanismos de aparición de la turbulencia con la teoría clásica de Landau-Ruelle-Takens.
Principales métodos:
- Extensas investigaciones experimentales.
- Simulaciones computarizadas completas.
Principales resultados:
- La turbulencia transitoria a bajos números de Reynolds se mantiene en un punto crítico distinto en las tuberías.
- El estudio identificó y caracterizó los procesos clave que sostienen la turbulencia.
- La proliferación espacial de los dominios caóticos, en lugar del aumento de la complejidad temporal, fue identificada como el factor decisivo.
Conclusiones:
- La turbulencia de los fluidos en las tuberías se sostiene por la propagación espacial de dominios caóticos.
- Este hallazgo desafía la visión clásica de la turbulencia que surge de la complejidad temporal.
- La investigación proporciona una nueva perspectiva sobre la naturaleza fundamental de la turbulencia de los fluidos.
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