Dear Amr,
I have no experience running the DWM code, so, cannot really answer your question.
We are currently working at NREL on a new DWM-like software called FAST.Farm that will replace the DWM code. The initial public release of FAST.Farm is not expected until September, 2017, but you can read about the implementation details in the AIAA SciTech 2017 paper we presented in January: nrel.gov/docs/fy17osti/67528.pdf. We are currently working on finalizing the source code and calibrating the empirical coefficients. After that, we’ll perform validation before the first public release.
Best regards,