A Brownian motion algorithm for tow scale modeling of chemical vapor infiltration

作者：Vignoles G L^*; Ros W; Szelengowicz I; Germain C

来源：Computational Materials Science, 2011, 50(6): 1871-1878.

DOI：10.1016/j.commatsci.2011.01.031

• Chemical vapor infiltration
• Diffusion/reaction problems
• Porous media
• Random walks
• 3D image-based modeling

Chemical vapor infiltration (CVI) is a frequent processing method for the tailoring of high-quality ceramic-matrix composites. It involves rarefied gas transfer in a disordered fibrous array and heterogeneous deposition reactions. Optimization of CVI by experimental means is prohibited by important fabrication costs and duration; triggering the need for a numerical model. Our tow scale computational tool reproduces gas transport by an Ito-Taylor random walk scheme whilst chemical reaction is handled by a Monte Carlo routine. Numerical validations of the code with respect to analytical estimates are presented. Finally, applications to 3D images are depicted and the influence of operating conditions on matrix deposition is discussed.

• 出版日期2011-4
• 单位中国地震局