Computation of the Permeability of Textiles

Finite difference computation of the permeability of textile reinforcements with a fast Stokes solver and new validation examples

For the simulation of the impregnation process of Resin Transfer Moulding, the permeability of the textile is a key input parameter. Using Darcy’s law, the permeability can be derived from a numerical simulation of the fluid flow for a unit cell problem. In this paper we present the results of simulations with a Stokes solver, implemented in the permeability predicting software FlowTex. The res...

Experimental design applied to fabrication of PSF membranes via NIP's method Part2:Influential parameters on pure water permeability and selection criteria for optimum membrane in MF process

Predicting the Permeability of Textile Reinforcements via a Hybrid Navier- Stokes/brinkman Solver

Numerical computation of textile permeability is important for composite manufacturing. Using Darcy’s law, permeability can be derived from a simulation of the fluid flow, i.e. after solving the Stokes, Navier-Stokes or Brinkman equations. The latter allow to model intra-yarn flow in case of permeable yarns. In this paper we present a numerical method for the calculation of the permeability of ...

A New Subdomain Method for Performances Computation in Interior Permanent-Magnet (IPM) Machines

In this research work, an improved two-dimensional semi-analytical subdomain based method for performance computation in IPM machine considering infinite-/finite-magnetic material permeability in pseudo-Cartesian coordinates by using hyperbolic functions has been presented. In the developed technique, all subdomains are divided into periodic or non-periodic regions with homogeneous or non-homog...

Homogenization and Numerical Simulation of Flow in Geometries with Textile Microstructures

The simulation of the Liquid Composite Moulding process is an important step for the manufacturing of composites with textile reinforcements. However, its fast direct numerical simulation is impossible on the microscale due to computational complexity reasons. We have to resort to the macroscale instead. Here, an essential task is the fast and accurate prediction of the permeability of textile ...