Six settling disks in a FENE-CR fluid: L=200
![[Animation]](1.jpg)
Six sedimenting disks form a long chain after drafting, kissing and chaining, which is different
from the well known phenomenon called drafting, kissing and tumbling for disks settling
in Newtonian fluid. In the FENE-CR model, the polymer extension limit is set to be L=200 in the function
f(C)=L*L/(L*L-tr(C)) where C is the conformation tensor. The results is very close to the one obtained in Oldroyd-B fluid with the same values of parameters.
- The dimension of computational domain = (0,1)x(0,7) 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 = 1.3
- The retardation time = 1.3/8
- 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 =0.1535
- The particle Reynolds number = 0.1476 < 1
- The Mack number = 0.3432 < 1
- The Debra number = 0.7980
- The elasticity number = 5.408