circulation convergence

[robytian]

Hi @ebranlard

Hi, I would like to ask some questions about the convergence of thecirculation you used in your lift coefficient iteration based method.
https://openfast.readthedocs.io/en/main/source/user/aerodyn-olaf/OLAFTheory.html#cl-based-iterative-method
1.In step 4, each iteration process, the gamma_LL is recalculated again right ? And then assigned to gamma_new.
2.The max delta gamma in step 5 should actually be the one at the current timestep, and the mean gamma new is the one I need to store and average over the past iterations?
3.The circulation that I get from the formula gamma_ll=1/2×cl×c×Vtotal, after iteration, always stays near the initial one I get, do you know why that is?
4.The method I use is from ABEDI (Development of Vortex Filament Method for Aerodynamic Loads on Rotor Blades) ,like the figure

BR,
Roby