HI all, i m trying to model a 3D NACA0012 at angle of attack = 15deg with a forward wedge on it positioned just upstream the separation point.Unfortunately i haven t got good reults for convergence using high resolution.Then i have tryied blend factor 0.5, but the quality is not good.I can t see the development of the boundary layer at all, plus it looks like the separation is totally disappeared.It looks like the inflation layer are not visible in the post processed results.I m running now blend factor 0.75 and i have increased the infaltion layer thickness and number.What do you think i should do? Thank you for any advice.

Franny

Factor to blend what ?

Are you using a commerical software or home developed code.What kind of grid generation, numerical discretization ,boundary condition do you use ?.

Please be specific about all the details of your simulation.People cannot help you without knowing the details.How many points do you use in the boundary layer.A simple calculation of delta ~ 1/sqrt(Re),can be used to estimate the size and then you can determine the number of points to use according to your numerical scheme.

Thank you for your answer.First of all I would like to apologize for my bad english,it is probably not enough to write here and to be understood.Anyway, i really appreciate all the people that helped me already, and please do not be too sarcastic with others as one day you could need help as well.Thanks for now and KIND REGARDS. Franny