Water tank and numerical model studies of flow over steep smooth two-dimensional hills

• Type: Article in International Scientific Journal
• Date: 2007

Authors

Loureiro, JBR (Author) Other; Soares, DV (Author) Other; Rodrigues, JLAF (Author) Other; F. T. Pinho (Author) Other; Freire, APS (Author) Other

Journal

Title: Boundary-Layer Meteorology

Vol. 122 No. 2

Pages: 343-365

ISSN: 0006-8314

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 15 Citations

Scopus - 16 Citations

Other information

Authenticus ID: P-004-BXD

DOI: 10.1007/s10546-006-9100-6

Abstract (EN): The present work investigates the role of different treatments of the lower boundary condition on the numerical prediction of flows over two-dimensional, smooth, steep hills. Four different law of the wall formulations are tested when a large recirculating region is formed on the lee side of the hill. Numerical implementation of the near-wall functions was made through a finite elements code. The standard kappa-epsilon model was used to close the averaged Navier-Stokes equations. Results are validated through original data obtained in a water tank. Measurements resorted to laser Doppler anemometry. The experiment provide detailed data for the characterization of the reverse flow in the region between the separation and the reattachment points, with emphasis on the near wall region. The experimental wall shear stress distribution is compared with the results provided by the different laws of the wall showing good agreement. The numerical predictions are shown to vary markedly between different formulations.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 23