diffusion boundary layer

基本解释

This impervious layer or boundary will retard the free diffusion of moisture. This condition is referred to as case hardening.
这一不透气的壳层(或边界层)会阻滞水分自由扩散，这种情形称为表面硬化。
Therefore, in the convective boundary layer the variation of vertical diffusion coefficients obtained from the Doppler acoustic radar can express the diffusion process well.
用声雷达测量的垂直扩散系数能够较好地反映对流边界层中的扩散过程。
The diffusion recovery due to the boundary layer suction and the separation of passage vortex are two main factors for the selection of the optimal suction location and suction flow rate.
吸气导致的栅内扩压能力恢复和通道涡三维分离效应是确定最佳吸气位置及吸气量的判定原则。