Based on the characteristics of the physical variables, the boundary near centerline is extended so that a high order finite difference scheme can be utilized as at inner mesh points.
根据相应物理量的特性，在中心附近进行边界延拓，使得内点的高精度差分格式可以同样应用在网格中心附近，从而无需单侧差分格式，保持了一致的高阶精度。
The mesh of copper tubes and loading ways of the balls are the key problems during three dimensional FE simulation of ball spinning of inner grooved tubes.
内螺纹管滚珠旋压三维有限元模拟中，铜管的网格划分和滚珠加载方式是模拟的关键问题。
A mesh grid of an inner basket of the dirt collecting box can be made into various specifications, and the inner basket is light and handy and convenient to wash with water.
集污箱的内筐网孔栅格可以做成多种规格，内筐轻巧，便于清水冲洗。
应用推荐