Lifting of an ellipsoid in a pressure driven Poiseuille flow

Lifting of an ellipsoid in a horizontal pipe of square cross section containing an incompressible viscous fluid driven by pressure drop in the horizontal direction for 0 < t < 8.

The flow is periodic in the horizontal direction.
The dimension of computational domain = (0,1)x(0,2)x(0,1).
The initial position is at the bottom of the pipe.
Three semi-axes are 0.1, 0.1, 0.2.
The density of tha ellipsoid is 1.01.
The density of fluid is 1.
The viscosity is 0.1
The mesh size for the velocity field = 1/80.
The mesh size for the pressure = 1/40.
The time step=0.001.
The pressure drop is 16 per unit length.
The last two second averaged ellipsoid speed is 6.05 (after reaching stable height).
The last two second averaged particle Reynolds number 24.2
The stable height of the mass center after lifting = 0.159
The mass center has been stayed under the central axis and the ellipsoid turns its broadside perpendicular to the stream main direction.