On the Sensitivity of Numerical Wind Field Modeling - WindSim

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Cosine hill – model input Grid: Resolution Height NZ Factor – Cell size in the horizontal plane – Distance from the hill top to the upper boundary – Number of cells in the z-direction – Distribution factor for refining the grid towards the ground Roughness: Z land – Roughness height for areas with elevation larger than 0 Z sea – Roughness height for areas with elevation equal to 0 Boundary conditions: BL Height – Boundary layer height BL Speed – Speed above the boundary layer Nesting – Initial and boundary conditions obtained by nesting Physical models: Transient Temp. Turb. mod. – Inclusion of the transient term in the transport equations – Inclusion of the transport equation for temperature – Turbulence closure Solution procedure: Iterations – Number of iteration performed in the solution procedure Solver – Segregated versus Coupled solver
Cosine hill – reference case Terrain Resolution Height NZ Factor #cells z land z sea 40x40 1500 20 0.1 139986 0.03 0.03 Wind Fields BL Height BL Speed Iterations Solver Nesting Turb. mod. Temp. 500 10.0 300 Seg. No k-eps No Reference case ID 1000 Resolution: 40x40 meters, approximately140 000 cells . Vertical direction: Height 1500 meters, 20 cells, distribution factor of 0.1. Distribution of the first 5 nodes in z-direction: 6.8, 23.7 47.0, 76.8, 113.0 meters Blocking: Setting the height of the computational domain to 1500 meters above the highest point in the terrain, gives a blocking less than 2%.
Page 1 and 2: On the Sensitivity of Numerical Win
Page 3 and 4: WindSim AS 1993 VECTOR AS; CFD cons
Page 5 and 6: AEP variation within a wind farm Si
Page 7 and 8: Simple terrain - Resources Wind res
Page 9 and 10: Simple terrain - Optimization Alter
Page 11 and 12: AEP variation within a wind farm Su
Page 13 and 14: Terrain conversion Conversion from
Page 15 and 16: Linear versus non-linear methods St
Page 17: Cosine hill - climatology Sector 1
Page 21 and 22: Cosine hill - ID 2000 WECS_40 WECS_
Page 23 and 24: Cosine hill Dowmstream climatology
Page 25 and 26: AEP parameter sensitivities - proce
Page 27 and 28: Hundhammerfjellet - 2D ridge Locati
Page 29 and 30: Climatology transfer The discrete r
Page 31 and 32: Hundhammerfjellet - climatology tra
Page 33 and 34: Weighting of climatology data Summa
Page 35 and 36: Energy content - wind profiles Ener
Page 37 and 38: Power curve correction procedure P
Page 39 and 40: Conclusion Calculation of the AEP i

On the Sensitivity of Numerical Wind Field Modeling - WindSim

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