Numerical Study of the Transition Regime between the Skimming and Wake Interference Flows in a Water Flume by Using the Lattice-Model Approach
Publication: Journal of Hydraulic Engineering
Volume 134, Issue 2
Abstract
A numerical study to describe the transition regime between the skimming and wake interference flows due to the influence of an idealized bed roughness in a water flume was carried out here using the lattice model approach. The model reproduced the skimming, transition, and wake interference regimes for different aspect ratios that determine the bed roughness geometry. The simulated turbulent structures were visualized by drawing the trajectories of a large number of passive tracer particles released in the computational domain, and the results agreed with those reported by the research works. The dimensionless streamwise and vertical turbulent intensities were calculated at five test sections. The results obtained supported the visualized flow patterns permitting us to detect the presence of a shear layer developed at the top of the roughness element, whose strength varied according to the flow regime simulated.
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Acknowledgments
The writers gratefully acknowledge the support of the Spanish Ministry of Education and Research (MEC) Projects UNSPECIFIEDAGL2005-05326/AGR and UNSPECIFIEDAGL2006-10927-C03-03/AGR. F. J. Jiménez-Hornero wishes to thank the Consejería de Innovación, Ciencia y Empresa, Junta de Andalucía (Ayudas para facilitar el Retorno de Investigadores a Centros de Investigación y Universidades de Andalucía) for their support.
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Published In
Journal of Hydraulic Engineering
Volume 134 • Issue 2 • February 2008
Pages: 274 - 279
Copyright
© 2008 ASCE.
History
Received: Jun 15, 2006
Accepted: Apr 16, 2007
Published online: Feb 1, 2008
Published in print: Feb 2008
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