Numerical Simulation on Deformation and Entanglement of the Fibers in Dilute Fiber Suspension Flow

Numerical simulation has been carried out for laminar uniform flow or Couette flow with fibers, which is described with pearl-necklace models. The SHAKE algorithm has been refined in order to simulate the flexibility of fibers. The refined algorithm has been applied to the pearl-necklace model. The computational results show that the flexibility of fibers can be simulated by changing the constraint condition of the angle formed by three adjacent beads in a suitable range. The entanglement of fibers is found to be predicted by considering the effect of collision between the beads belonged to a different model.