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Dinámica de Interfases de Impacto de Gotas sobre un Estanque de Líquido Viscoelástico
Wenyuan Zhong1, Zhiwei Song1, Yongkang Qin1
1School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
Langmuir : the ACS journal of surfaces and colloids
|December 30, 2025
Resumen
La elasticidad de las soluciones poliméricas impacta la dinámica de las gotas, alterando la forma de la cavidad y la longitud del chorro. El rebote de las gotas depende de forma no monotónica de la concentración del polímero, ofreciendo perspectivas para la impresión 3D y la encapsulación.
Área de la Ciencia:
- Dinámica de fluidos
- Reología
- Ciencia de polímeros
Sus antecedentes:
- La dinámica de impacto de gotas es crucial en aplicaciones industriales como la impresión de inyección de tinta y el recubrimiento por aspersión.
- Si bien las propiedades de las gotas se han estudiado bien, el efecto de los estanques líquidos viscoelásticos en el impacto es menos conocido.
Objetivo del estudio:
- Investigar la dinámica de impacto de gotas de aceite sobre soluciones acuosas de polímeros viscoelásticos.
- Elucidar el papel de la elasticidad del estanque líquido en la interacción gota-estanque.
Principales métodos:
- Observación experimental del impacto de gotas.
- Simulaciones numéricas directas (DNS) para validar los hallazgos experimentales.
Principales resultados:
- La elasticidad del estanque mejora la curvatura de la cavidad, reduce la profundidad de la cavidad y acorta el chorro hacia adelante.
- Se observó una relación no monotónica entre el umbral de rebote de la gota (número de Reynolds) y la concentración del polímero.
- Este comportamiento está relacionado con la concentración crítica de superposición de la solución polimérica.
Conclusiones:
- La viscoelasticidad influye significativamente en los resultados del impacto de gotas.
- Los hallazgos proporcionan una comprensión más profunda de las interacciones gota-líquido en fluidos complejos.
- Los resultados pueden informar avances en tecnologías como la impresión 3D y la encapsulación de gotas.
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