Robust Numerical Simulation of Porosity Evolution in Chemical Vapor Infiltration: II. Two-Dimensional Anisotropic Fronts

✍ Scribed by Shi Jin; Xuelei Wang

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 308 KB
• Volume: 179
• Category: Article
• ISSN: 0021-9991
• DOI: 10.1006/jcph.2002.7074

✦ Synopsis

A mathematical model is developed to study formation and evolution of pores during the chemical vapor infiltration (CVI) process. In this model the evolving fiber-gas interface is described by a level-set function with growth rate determined by the vapor precursor concentration and the local geometry. The vapor precursor, solely driven by diffusion, is described by a boundary value problem of the Laplace equation. We then numerically solve this model using the immersed interface method and a fast searching method developed by the authors for pore detection. This model is able to numerically advance the fiber-gas interface and automatically handle fiber merging and pore formation. Numerical experiments are conducted to validate this model and the corresponding numerical algorithm.