[seedl]

hi every one!
I am trying to simulate the aerodynamics of the body of an insect fly.
but the problem is that the fly's speed and size is very low. and it will have a very little reynolds number.
in other hands, the Angle of attack of the body is so high!
.
and the other problem is the Flow separation which will occurs.
if it's possible. please tell me which turbulent model is the best for this case?
.
and can i use the default Coefficients of the model in software?
.
the simulated body will experiments in two methods. one that all of the wools of the insect are cleaned and other one that insect's body have more than 10000 of hairs.
thank you!