Particulate Flow Simulation

The dimension of computational domain = (0,1)x(0,1)x(0,4) initially, then it moves vertically with the center of the ellipsoid.
The semi-axis of the ellipsoid are 0.15, 0.1 0.1.
the density of ellipsoid = 1.25
the density of fluid = 1
the viscosity = 0.54
the relaxation time = 0.15
the retardation time = 0.15/8
the mesh size for the velocity field = 1/60
the mesh size for the extra stress tensor = 1/60
the mesh size for the pressure = 1/30
the time step=0.001
The averaged terminal speed =1.413
The particle Reynolds number = 0.785 < 1
The Mack number = 0.745 < 1
The Debra number = 0.707
The elasticity number = 0.9