[tsh850227]

Hi all,

I am modelling a particle's freefalling motion with DOF in a container. I think my model, including remesh and dynamic mesh is okay. But, the final result is not quite different from theory. My fluid is with a constant viscocsity of 1 Pa s. Particle's material is glass, which density is 2500 kg/m3, and diameter of paticle is 1mm. According to Stokes' Law, terminal velocity of particle should be around 0.0028 m/s, But the result from my model is 0.5 m/s. I have checked the cas file again and again, unfortunately cannot find any problem. so any suggestion from all? thank you in advance.