Research Group of Prof. Dr. M. Griebel
Institute for Numerical Simulation

  author = {B. Verleye and R. Croce and M. Griebel and M. Klitz and
		  S.V. Lomov and G. Morren and H. Sol and I. Verpoest and D.
  title = {Permeability of textile reinforcements:simulation;
		  influence of shear, nesting and boundary conditions;
  booktitle = {Proceedings of the 9th International Conference on Flow
		  Processes in Composite Materials},
  year = {2008},
  publisher = {International Conference on Flow Processes in Composite
		  Materials edition},
  annote = {series},
  volume = {9},
  address = {Qu\'ebec},
  abstract = {A fast an accurate simulation tool for the permeability of
		  textiles is presented, based on a finite difference
		  discretisation of the Stokes equations. Results for single
		  layer, multi layer and sheared models are discussed. The
		  influence of intrayarn flow and periodic respectively wall
		  boundary conditions are considered. Simulated permeability
		  values are compared with experimental data. For the
		  creation of the textile model the WiseTex software is used,
		  which implements a generalised description of internal
		  structure of textile reinforcements on the unit cell level.
		  A finite difference Navier-Stokes solver, NaSt3DGP, was
		  developed at the Institute for Numerical Simulation at the
		  University of Bonn. The flow solver employs a Chorin
		  projection on a staggered grid for the solution of the
		  Navier-Stokes. In the staggered grid approach, the pressure
		  is discretised at the centre of the cells, while the
		  velocities are discretised on the edges. This
		  discretisation leads to a strong coupling between pressure
		  and velocities, and therefore avoids the occurrence of
		  unphysical oscillations in the pressure. The experimental
		  validation is performed with a highly automated central
		  injection rig PIERS.},
  pdf = { 1}