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WeFarm 1.0

Xiaodong Zhang's picture
Submitted by Xiaodong Zhang on May 5, 2015 - 10:39am
Main hypothesis

1. Steady state Atmospheric Boundary Layer flow. Incoming wind velocity profile is based on logarithmic distribution with stratification amendments for non-neutrual conditions. Different from surface layer, the mixing length L is defined as: 1/L = 1/z + 1/Lm + 1 / (zi - z), where z is evelation, zi is thickness of ABL and Lm is a middle length.  

2. No gravity and vertical pressure gradient for neutrual stratification. Potential temperature is adopted for non-neutrual conditions, and a reverse cap is simulated for the convective boundary layer.  

3. A logrithmic profile is used for turbulent flow wall function.  

Software
Solver
Fluent 6.3
License
Regime
Turbulence
Turbulence closure
Turbulence model

k-ε model, with Cμ = 0.03.

Atmospheric boundary layer
Range
Coriolis
No
Atmospheric Stability
Atmospheric Stability
Yes
Stability model
Monin-Obukhov similarity theory
Canopy
Forest canopy
No
Wind farm
Wind turbine
No
Remarks

At present, the ABL approach is under consideration, since coriolis force is not added. Coriolis force could be turned on easilly but some testing process must carry on.