在球运行路径的某一点(10米处，或人墙的位置)球的速度下降，使空气在球体表面形成较稳定的层流。
Some way into its path - perhaps around the 10 m mark (or at about the position of the wall of defenders) - the ball's velocity dropped such that it entered the laminar flow regime.
当球在空中速度减慢时，周围的气流从湍流变为稳定的层流。
As a soccer ball slows down after it's kicked in the air, the air flow around it changes from turbulent to smooth.
为在层流条件下的血流动力学、流变学以及体外模拟等理论或实验研究提供了稳定性方面的理论依据。
A theoretical Method of stability was provided for further theoretical and experimental research under laminar condition such as Cardivascular fluid dynamics, Biorheology, Simulation in vitro, etc.
利用线性稳定理论。对气液两相分层流动模型进行了严格的理论分析。
A theoretical analysis is made, by applying linear stability theory, orl the model of gas-liquid stratified flow.
本文用可控热脉冲输入临界层的方法研究了平板层流边界层的稳定性与转捩。
An experimental study on the laminar boundary layer instability and transition was carried out in a flat-plate boundary layer by means of controllable heat pulsing introduced into the critical layer.
本文建立了一种新的两层流模型，考虑了界面变形对系统稳定性的影响。
In the present paper, a new two-sided model is proposed and the interface deflection is taken into account.
基于可压缩流体不稳定流动理论及地层流体渗流理论，建立了气体钻井过程中井筒瞬态流动的数学模型。
Based on the theory of unsteady flow of compressible fluid and the seepage theory of formation fluid, the mathematical model of the gas transient flow in the wellbore has been established.
模型主要包括井筒流动模型、不稳定储层流动模型、液体界面移动模型和酸蚀蚓孔模型等。
The models was established of the following components: wellbore flow model, unstable reservoir flow model, the fluid interface movement model, acid etching wormhole model and etc.
利用不同密度分层的盐水模拟稳定层结大气条件，在水槽中成功地模拟了两层大气分层流中二维山脊引起的地形波，得到的波动图像与线性理论模式结果在定性上基本一致。
The mountain wave induced by a ridge in two-layer stratifiedfliud has been successfully simulated in a tank . The wave pattern is almost the same compared with the linear theory result qualitatively.
利用不同密度分层的盐水模拟稳定层结大气条件，在水槽中成功地模拟了两层大气分层流中二维山脊引起的地形波，得到的波动图像与线性理论模式结果在定性上基本一致。
The mountain wave induced by a ridge in two-layer stratifiedfliud has been successfully simulated in a tank . The wave pattern is almost the same compared with the linear theory result qualitatively.
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