Hey,
To me Darren’s post makes sense. The viscous forces exerted on the body should logically be on the positive x direction.
Right after this simulation “40mps”, another simulation named “Darren Numerics” was ran and the Cd values for this one are in the 0,25’s ballpark. The difference in forces between these 2 simulations is that in the latter pressure forces were only 22,6N (versus 32N for the first one).
The confusing part is that the x wall shear stress contours from SimScale shows mostly negative values:
Which makes me think that the plot was made from the flow point of view and not from the surface point of view (third newton’s law?)