G. Montero et N. Sanin, 3-D modelling of wind field adjustment using finite differences in a terrain conformal coordinate system, J WIND ENG, 89(5), 2001, pp. 471-488
Citations number
6
Categorie Soggetti
Mechanical Engineering
Journal title
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
A mass consistent model is developed in order to obtain a wind field which
adjusts to an initial one. For the construction of the initial field, horiz
ontal interpolation is considered at the level of the measure stations over
the terrain. From these values, vertical wind profiles are built according
to atmospheric stability conditions, terrain roughness, geostrophic wind,
atmospheric stratification. The problem is formulated in terms of an incomp
ressible fluid with no-flow-through conditions on the terrain. The adjustme
nt is carried out by minimizing a least-square function. Lagrange multiplie
rs technique leads to an elliptic problem, which is discretized using finit
e-differences schemes after applying a proposed system of terrain conformal
coordinate. This change not only simplifies the mesh generation, but leads
to simpler boundary conditions and allows the definition o:F the vertical
spacing with more resolution near the terrain without affecting the efficie
ncy. Finally, the numerical model is applied to realistic data correspondin
g to the Island of La Palma (Canary Islands). (C) 2001 Elsevier Science Ltd
. All rights reserved.