log law wind profiles

[samjkmartin]

I have read that log law velocity profiles are generally more accurate in the lower atmospheric boundary layer than power law profiles are. Is there a way to have log law profiles for the incoming wind conditions instead of power law profiles?

[rafmudaf]

Hi @samjkmartin it's nice to hear from you.
The power-law profile is set in FlowField.initialize_velocity_field and the exponent is a user input. The equation itself isn't available through the input file, but you could modify that line to use a log profile instead.

[rafmudaf]

Also, if you're using the Gauss wake model, then you'll need to set the wind profile derivative on the following line, as well. It's currently the derivate of the power-law profile.

[samjkmartin]

Thanks, nice to hear from you too. Does that apply to the EM Gauss model as well?

[rafmudaf]

Searching for dudz_initial_sorted in the solver file, it looks like it's not used in the Empirical Gauss model. And more accurately, it's used to calculate the v and w components of the velocity, so it's more accurate to say it's used in the Gauss-Curl-Hybrid model. That search also shows it's used in the CC model.

[samjkmartin]

Thank you.