A numerical model to predict fiber tow saturation during liquid composite molding

摘要: Abstract A dual scale porous medium contains two distinct scales of pores. We will consider the case in which small pores are ordered within well-defined sub-regions. Typical examples such media textile preforms used various composite-manufacturing processes. Rigorously, phenomenon can be modeled by using Darcy's law to describe flow through and mass conservation for larger The smaller included these equations as a sink term. This approach, though straightforward, poses implementation difficulties. In this paper, we suggest an alternative way model concept. use standard finite element/control volume approach “internal” term appending extra one-dimensional elements control volumes associated with discretized part geometry. offers advantages over previously attempted schemes: (1) problem solved remains linear calculated explicitly time domain (2) existing simulation packages RTM filling able incorporate saturation effects simulate media. To illustrate point present developed algorithm frameworks package LIMS. is capable providing data during arbitrarily shaped capture influence on pressure or flow-rate. should prove useful determining needed completely saturate fiber tows, crucial performance also allow us explain variation injection difficulties “assigning” single permeability medium.