Assessment of Steady and Unsteady Friction Models in the Draining Processes of Hydraulic Installations
Fecha
Autores
Coronado-Hernández, Oscar E.
Derpich, Ivan
Coronado-Hernández, Jairo R.
Gatica, Gustavo
Directores
Handle
https://riunet.upv.es/handle/10251/182720
Cita bibliográfica
Coronado-Hernández, OE.; Derpich, I.; Fuertes-Miquel, VS.; Coronado-Hernández, JR.; Gatica, G. (2021). Assessment of Steady and Unsteady Friction Models in the Draining Processes of Hydraulic Installations. Water. 13(14):1-13. https://doi.org/10.3390/w13141888
Titulación
Resumen
[EN] The study of draining processes without admitting air has been conducted using only steady friction formulations in the implementation of governing equations. However, this hydraulic event involves transitions from laminar to turbulent flow, and vice versa, because of the changes in water velocity. In this sense, this research improves the current mathematical model considering unsteady friction models. An experimental facility composed by a 4.36 m long methacrylate pipe was configured, and measurements of air pocket pressure oscillations were recorded. The mathematical model was performed using steady and unsteady friction models. Comparisons between measured and computed air pocket pressure patterns indicated that unsteady friction models slightly improve the results compared to steady friction models.
Palabras clave
Air pocket, Draining process, Friction factor, Transient flow, Unsteady
ISSN
2073-4441
ISBN
Fuente
Water
DOI
10.3390/w13141888
Enlaces relacionados
Agradecimientos
This research was supported by the Research Department of the Universidad Andres Bello, grant number DI-12-20/REG; and the University of Santiago of Chile with DICYT-Project Number 062117DC.