因为沿底部运动的异重流与上部较轻的流体置换，必须产生一种力来克服边界阻力。
Because the stream moving along the bottom displaces the lighter fluid upward, a force must be provided to overcome boundary resistance.
当你跨组织边界的时候就会遇到很大的阻力，特别是在业务和IT组织之间。
There is a huge impedance mismatch as you cross an organizational boundary, particularly the boundary between the business and IT organizations.
大部分的阻力产生于混乱和不可预知的自然边界层之间在物体和气流之间。
Most of this drag is a result of the chaotic and unpredictable nature of the boundary layer - the layer immediately between the object and the airflow.
发现边界层阻力不仅和其厚度有关，还和其形成过程有关。
It has been found that the boundary layer resistance is related with not only its thickness but also its formation process.
在不考虑可压缩性因素时，滑移边界条件的阶数对阻力系数的影响较大，对换热系数的影响不是十分明显。
The order of slip boundary condition shows an apparent influence on the friction coefficient but only a slight influence on the Nusselt number if compressibility is ignored.
理论分析和实验的结果说明：边界层分离将引起压差阻力。
The theoretical analysis and experimental results show that boundary layer separation will produce pressure drag.
离心式固液两相流泵叶片的边界层的理论分析，可以为分析流体在叶片表面沿程阻力提供基础，进一步也可以为确定叶片型线提供理论依据。
The theoretical analysis of boundary layer in vane of centrifugal two-phase flow pump may provide a basis for flow drag in vane surface and a theoretical evidence to determine vane curve.
针对典型形状微通道(微缝隙)在滑移边界条件下，利用粘性流体运动方程和动量方程，推导出速度场和流动阻力。
Aimed at typical shape micro-channel (fissure) under slip confine condition, it used dauby fluid motion equation and momentum equation, derived pace bout and running resistance.
边界层分离点、物面最小压力点及阻力系数的计算结果与一些数值解及实验结果是符合的。
The boundary layer separation points, minimum pressure positions on the surface and the drag coefficients are in agreement with numerical solutions and experimental results.
该模型不仅考虑了非稳态下膜相扩散阻力，而且还考虑了外相边界层的扩散阻力及膜破裂。
This model takes into account both the diffusion resistance of the membrane phase in non-steady state and the diffusion resistance of the external phase boundary film and the membrane leakage.
对于速度边界层提出了相似性解的解析结果，给出了速度分布、边界层厚度、摩擦阻力和水头损失的解析计算表达式。
Calculation formula of velocity distribution, boundary layer thickness, friction force and loss of water head are given out, in accordance with the result from theory analysis of similitude solution.
它能控制气流分离和减小大迎角时的阻力，提高抖振边界和降低抖振强度，改善大迎角的飞行品质。
They also can expand the buffet boundary and decrease the buffet intensity. As a result, the large angle-of-attack flying quality can be significantly improved by utilization of maneuvering flaps.
然后通过在各个边界面满足相应的边界条件来求出源强，进而得到所求的兴波阻力。
The source strength are obtained by satisfying all the boundary conditions on each side, and the wave-making resistance is gained consequently.
本文根据计算结果，研究了边界层中的微气泡对平板表面摩擦阻力的影响。
The effect of microbubbles in the boundary layer on the skin friction of the plate is presented in this paper based on the computational results.
本文根据计算结果，研究了边界层中的微气泡对平板表面摩擦阻力的影响。
The effect of microbubbles in the boundary layer on the skin friction of the plate is presented in this paper based on the computational results.
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