Ok, more an issue to do with flow simulation than modelling.
I have never used the flow-works add on in solidworks, but I have plenty of experience in Ansys Fluent. If you can work with a dedicated mesh and solver package rather than flow works you will get more useful results.
Bear in mind when using CFD that drag from your finite wing model (assuming your working in 3D) will be less than you will see in the 'real world'. Even with a relatively dense mesh, the tip vortices will diffuse at a greater rate than they will in a wind tunnel for example. Hence your induced drag component will be lower than expected.