A red blood cell tank-treads with a swing motion in a 3D shear flow

The length and the depth of the channel are 20 microns and its height is 10 microns.
The density of fluid inside and outside of the membrane is 1.
The viscosity of the fluid inside and outside of the membrane is 0.012.
There is no shape memory effect in this simulation.
The shear rate is 25/s.

The cell is suspended in the middle between two planes moving in the opposite direction with the same speed. Two red * marks on the cell membrane show the tran-treading motion of the cell (with a swing motion).