WRFv4.6.0 wind farm opt = 2 not initiating

[irina]

Hi all,

I struggle to activate the new wind farm option in WRFv4.6.0 using windfarm_opt=2.

I don't get any differences in the wind field when using the option windfarm_opt=2 (even with default wake model and overlap). Wind turbine file created as winturbines-ll.txt following example here WRF Physics — WRF Users Guide documentation. For the record I tried 11 combinations of the new options, but the model doesn't consider any. Funny enough when I removed all wind farm files (.tbl and .txt) and kept windfarm_opt=2, the model didn't crash, nor output any indications that is looking for a file winturbines-ll.txt or windturbines.txt. (windfarm_opt=1 Fitch is running ok and if the coordinates file is missing the model crashes).

If you managed to run a wind farm with windfarm_opt=2, could you please share your experience and what combination of options for wake and overlap worked? Thank you in advance.

Best regards,
Irina

 

[Ming Chen]

Hi Irina,

I wonder whether you have the file "windturbines-ll.txt" in your running directory. In your post, your file name is "winturbines-ll.txt ", hope it is just a typo and you actually have the file "windturbines-ll.txt".

In your namelist.input, did you set windfarm_ij =2?

We don't have many experiences running WRF with the option windfarm_opt=2. This scheme was put into WRF as is and we chose to trust that the developer had well tested this scheme. If not, please let me know.

Just in case you need to take a look, below are two papers related to your option:

Ma, Yulong, Cristina L. Archer, and Ahmadreza Vasel-Be-Hagh. "The Jensen wind farm parameterization." Wind Energy Science 7.6 (2022): 2407-2431.
Ma, Yulong, Cristina L. Archer, and Ahmad Vasel‐Be‐Hagh. "Comparison of individual versus ensemble wind farm parameterizations inclusive of sub‐grid wakes for the WRF model." Wind Energy 25.9 (2022): 1573-1595.