Dear @Jundong.Wang,
Presumably you are trying to run TurbSim for a FAST.Farm simulation; is that correct?
Unfortunately, TurbSim was not developed to generate such large and finely discretized wind data files. To generate large wind domains for FAST.Farm, we typically use Mod_AmbWind = 3, which requires that you run TurbSim separately for both the low- and high-resolution domains. The low-res TurbSim domain can be large and cover the full wind farm, but be coarsely discretized, at least spatially. The high-res TurbSim domains around each wind turbine can then be derived to be consistent with the low-res domain using the TIMESR option of TurbSim. See the “Modeling Guidance” section of the online FAST.Farm documentation for more information, including Python scripts that can be used to aid in the process.
Best regards,