VERY nice work. It's very interesting that your simulation is confirmed by my experiments: on the low pressure side of the fuselage there's a strong spanwise flow on the vertical tail and on the high pressure side the air is moving around the top and bottom of the fuselage to the low pressure side. Thanks for sharing your results.

Which CFD software did you use? I would be very interested in running such simulations for different configurations (with and without canalizer, fin fences, fuselage strakes) and measure the actual forces involved. I have the 3D models but i'm not a CFD specialist, is it difficult to learn?