Inertial Settling of Flexible Fiber Suspensions*

The inertial settling of suspensions of flexible and rigid fibers are investigated using an Immersed Boundary Method. For the settling of a suspension of inextensible and slender fibers at a Galileo number of $Ga=160$, we examine a range of dimensionless bending rigidities and fiber concentrations that span dilute and semi-dilute regimes ($0.5

*The support from the European Research Council grant no. ERC-2013- CoG-616186, TRITOS and the computer time provided by SNIC (Swedish National Infrastructure for Computing) are acknowledged.