WINDS (Wind-field Interpolation by Non-Divergent Schemes) is a diagnostic mass-consistent model for simulation of the three-dimensional wind field in complex terrain at mesoscale. WINDS was designed at the Department of Physics, University of Genova, Italy as an evolution of the AIOLOS model (Lalas, 1985; Lalas et al., 1988). Both models have the origin in the well-known NOABL model (Philips, 1979) with diverse modifications to construct more reliable "first-guess" wind profiles, introducing surface roughness and stability effects in the Planetary Boundary Layer (PBL). The development of the code WINDS has been chronicled in several publications and reports (Ratto et al., 1990; Mazzino et al., 1994; Ratto et al., 1994; Ruaro et al., 1995). The presented version of the code (Release 4.2) is a natural descendant of the previous ones but incorporates advances in the numerical formulation. In fact in the fourth version of the code, besides the SOR iterative method, the ADI iterative method (Roache,1982) has been implemented in order to achieve a non-divergent flow field. If one uses ADI procedure, computational time is reduced till a factor or 30. Like the previous WINDS modelling package, Release 4.2 has an user-friendly input and different initialisation possibilities. The main input information required for a single run, have to be introduced by a single data file (INPWIN.DAT), where by means of a lot of explanations the user can choose model options and parameters. Dependent on the available data the code can construct the initial wind field using ground station data and/or geostrophic wind or observed experimental vertical profiles (for example SODAR-data). Atmospheric stability and different surface roughness effects on the PBL structure are taken into account by means of theoretical expressions (Zilitinkevich, 1989). A specific algorithm deals Internal Boundary Layer (IBL) effects due to a steep change in surface roughness. A possibility for potential flow simulation is furnished giving constant wind, or constant wind profiles data in the domain under consideration. This allows the investigation of the main topographic effects on the flow. Chapter 1 reviews the theoretical background of the code (the variational formalism). In Chapter 2 the initialisation methods are described and for each method the necessary input information is defined. Chapter 3 outlines the numerical procedure for the adjustment phase and comments the utilised computational grid. The input data file and the form for completing the input information are discussed in Chapter 4.
WINDS Release 4.2 User's Guide
E Canepa;
2003
Abstract
WINDS (Wind-field Interpolation by Non-Divergent Schemes) is a diagnostic mass-consistent model for simulation of the three-dimensional wind field in complex terrain at mesoscale. WINDS was designed at the Department of Physics, University of Genova, Italy as an evolution of the AIOLOS model (Lalas, 1985; Lalas et al., 1988). Both models have the origin in the well-known NOABL model (Philips, 1979) with diverse modifications to construct more reliable "first-guess" wind profiles, introducing surface roughness and stability effects in the Planetary Boundary Layer (PBL). The development of the code WINDS has been chronicled in several publications and reports (Ratto et al., 1990; Mazzino et al., 1994; Ratto et al., 1994; Ruaro et al., 1995). The presented version of the code (Release 4.2) is a natural descendant of the previous ones but incorporates advances in the numerical formulation. In fact in the fourth version of the code, besides the SOR iterative method, the ADI iterative method (Roache,1982) has been implemented in order to achieve a non-divergent flow field. If one uses ADI procedure, computational time is reduced till a factor or 30. Like the previous WINDS modelling package, Release 4.2 has an user-friendly input and different initialisation possibilities. The main input information required for a single run, have to be introduced by a single data file (INPWIN.DAT), where by means of a lot of explanations the user can choose model options and parameters. Dependent on the available data the code can construct the initial wind field using ground station data and/or geostrophic wind or observed experimental vertical profiles (for example SODAR-data). Atmospheric stability and different surface roughness effects on the PBL structure are taken into account by means of theoretical expressions (Zilitinkevich, 1989). A specific algorithm deals Internal Boundary Layer (IBL) effects due to a steep change in surface roughness. A possibility for potential flow simulation is furnished giving constant wind, or constant wind profiles data in the domain under consideration. This allows the investigation of the main topographic effects on the flow. Chapter 1 reviews the theoretical background of the code (the variational formalism). In Chapter 2 the initialisation methods are described and for each method the necessary input information is defined. Chapter 3 outlines the numerical procedure for the adjustment phase and comments the utilised computational grid. The input data file and the form for completing the input information are discussed in Chapter 4.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
