摘要
采用Voronoi随机算法建立微尺度W骨架多孔模型,基于Young-Laplace修正后的Navier-Stokes动量方程,应用有限体积法分析制备CuW合金的渗流过程。模拟结果表明:Cu-W间的润湿性越好,则铜液流股中心流速越大,但铜液在骨架壁面的黏附越强,从而有利于铜液与壁面接触而产生机械结合。此外,渗流通道中由于孔径不均匀引起的扩孔与缩孔转变导致铜液在孔隙中形成漩涡,促使CuW合金中产生气孔,从而降低铜液的充填率。
A micro-scale W skeleton porous model was built by random Voronoi segments, and the infiltration process of CuW alloy was then simulated using a finite volume method based on the Navier-Stokes momentum equation modified by Young-Laplace. The simulation results show that improving the wettability of Cu-W can accelerate the velocity in the center of copper flow and strengthen the adhesion of liquid copper to the wall of W skeleton, resulting in the mechanical combination at the interface of Cu-W. Moreover, the transition of reaming and shrinkage due to the ununiform pore size can produce whirlpools of copper liquid in the pores, resulting in pores in the CuW alloy, and thus the filling rate of copper liquid is decreased.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2013年第4期730-735,共6页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51174161)
国家自然科学基金重点项目(50834003)
陕西省自然科学基础研究计划重点项目(2010GZ007)
陕西省重点学科建设专项资金
关键词
CuW合金
W骨架
渗流
润湿性
CuW alloy
W skeleton
infiltration
wettability