Ten settling disks in a FENE-CR type fluid: L=5
Ten sedimenting disks form stable chains of 2 or 3 particles after drafting, kissing and chaining, which is different
from the disks settling in Newtonian fluid. In the FENE-CR model, the polymer extension limit is set to be L=5 in the function
f(C)=L*L/(L*L-tr(C)) where C is the conformation tensor.
- The dimension of computational domain = (0,1)x(0,16) initially,
then it moves vertically with the center of the lowest disk.
- The radii of the disks are 0.125.
- the density of disks = 1.01
- the density of fluid = 1
- the fluid viscosity = 0.26
- the relaxation time = 2
- the retardation time = 1/4
- the mesh size for the velocity field = 1/96
- the mesh size for the extra stress tensor = 1/96
- the mesh size for the pressure = 1/48
- the time step=0.0004
- The averaged terminal speed =0.11
- The particle Reynolds number = 0.11 < 1
- The Mack number = 0.315 < 1
- The Debra number = 0.909
- The elasticity number = 8.32