Motion of a Deformable Solid in a Fluid

Hi there,

I want to study the motion of a deformable solid in a fluid; the red blood cell's motion in a capillary. I don't know if COMSOL is a good choice for this kind of problem. I would be grateful if anyone could please help me.

In addition, for the very first step, I want to study a very simple case; something like motion of a rigid sphere (circle) in a cylinder (2D channel).

Then, I'll try to add the elasticity of the cell, which does not seem to be easy!

Any suggestion, reference, tutorial, or sample, is appreciated!

Thanks