抄録
A micro-organism is modelled as a squirming sphere with prescribed tangential surface velocity, referred to as a squirmer. The swimming motions of two interacting squirmers are solved by the boundary element method with the help of lubrication theory when they are close to contact. The results show that the squirmers attract each other at first, then they change their orientation dramatically when they are in near contact, and finally they separate from each other. The movement of 27 identical squirmers in a cubic region of fluid otherwise at rest has also been computed, too. It is found that the spreading of squirmers is correctly described as a diffusive process after a sufficiently long time, even though all the movements of the squirmers were deterministically calculated.
