Hello,
I am conducting WRF sensitivity experiments using the Fitch wind farm parameterization by setting windfarm_opt = 1.
After enabling windfarm_opt = 1 in my 1-km domains, the July simulation stopped due to CFL errors. In contrast, the control simulations without windfarm_opt = 1 ran successfully for both January and July. The January sensitivity experiment with windfarm_opt = 1 also completed successfully.
For the problematic July case, I have attached my namelist.input and the relevant rsl.error.0182 file. I also checked the CFL locations, and they occur mainly in the wind farm region in d04.
The wind turbine parameters I used are:hub height: 105 m
rotor diameter: 175 m
standing thrust coefficient: 0.100
rated power: 5.3 MW
The turbine layout is relatively dense. In the densest wind farm area, there may be 3–4 turbines within a single 1-km grid cell. In total, about 1800 turbines are placed across three wind farms.
In my experiments, windfarm_opt = 1 was enabled in d04.
Could the CFL problem be mainly related to the strong wind farm forcing caused by the large rotor diameter and dense turbine distribution in the 1-km domain? Are there any recommended approaches to improve numerical stability in this situation?
Any suggestions would be greatly appreciated.
Thank you very much.
I am conducting WRF sensitivity experiments using the Fitch wind farm parameterization by setting windfarm_opt = 1.
After enabling windfarm_opt = 1 in my 1-km domains, the July simulation stopped due to CFL errors. In contrast, the control simulations without windfarm_opt = 1 ran successfully for both January and July. The January sensitivity experiment with windfarm_opt = 1 also completed successfully.
For the problematic July case, I have attached my namelist.input and the relevant rsl.error.0182 file. I also checked the CFL locations, and they occur mainly in the wind farm region in d04.
The wind turbine parameters I used are:hub height: 105 m
rotor diameter: 175 m
standing thrust coefficient: 0.100
rated power: 5.3 MW
The turbine layout is relatively dense. In the densest wind farm area, there may be 3–4 turbines within a single 1-km grid cell. In total, about 1800 turbines are placed across three wind farms.
In my experiments, windfarm_opt = 1 was enabled in d04.
Could the CFL problem be mainly related to the strong wind farm forcing caused by the large rotor diameter and dense turbine distribution in the 1-km domain? Are there any recommended approaches to improve numerical stability in this situation?
Any suggestions would be greatly appreciated.
Thank you very much.
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