Hello, nThank you for your response.nI have tried what you have said with a velocity of 0.1. My original Reynolds number was 7.03 x 10^−8 and with this new velocity, it was 1.41 x 10^-7. It did increase the Cd significantly. However, why are Cd and Cl increasing? I thought that drag in general increases with increasing speeds because the object has to hit more water particles at higher speeds. Is this the relationship you are referring to? nnLet me know and it would be great if you could send some further sources.nnn