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SMALL SCALE WIND FIELD SIMULATIONS FOR THE STEEP GAUDERGRAT RIDGE USING CFX-4 AND ARPS; INFLUENCE OF THE BOUNDARY CONDITIONS AND COMPARISON WITH MEASUREMENTS
Christophe Hug
; Swiss Federal Institute for Snow and Avalanche Research, SLF, Flüelastrasse 11, CH - 7260 Davos Dorf, EFLUM - ENAC, Swiss Federal Institute of Technology Lausanne, EPFL, CH - 1015 Lausanne
Françoise Faure
; Swiss Federal Institute for Snow and Avalanche Research, SLF, Flüelastrasse 11, CH - 7260 Davos Dorf
Michael Lehning
; Swiss Federal Institute for Snow and Avalanche Research, SLF, Flüelastrasse 11, CH - 7260 Davos Dorf
Stephen Mobbs
; Institute for Atmospheric Science, School of Environment, University of Leeds, UK - Leeds LS2 9JT
Norbert Raderschall
; Swiss Federal Institute for Snow and Avalanche Research, SLF, Flüelastrasse 11, CH - 7260 Davos Dorf
Jacques-André Hertig
; EFLUM - ENAC, Swiss Federal Institute of Technology Lausanne, EPFL, CH - 1015 Lausanne
Sažetak
Two meso-scale numerical models, the Advanced Regional Prediction System ARPS, and a model based on the computational fluid dynamics model CFX-4, were used to simulate very high resolution wind fields above the complex mountainous topography of an Alpine ridge. Using an horizontal mesh resolution of 25x25 m, both models were able to reproduce qualitatively important flow features (change in direction and separation) that had been observed in the field. However, it could also be shown that the boundary conditions strongly influence the results.
Ključne riječi
Wind; simulation; CFD; Snow drift; Measurements; Steep terrain; micro-scale; flow separation
Hrčak ID:
64410
URI
Datum izdavanja:
15.12.2005.
Posjeta: 1.012 *