If you kick the ball hard enough for the airflow over the surface to become turbulent, then the drag force remains small and the ball will really fly.
如果你踢球的力量足够大，使得球表面的气流形成湍流，则阻力会很小，你很可能踢成高射炮。
However, when the airflow is turbulent, the boundary layer sticks to the ball for longer.
然而，当气流为湍流时，边界层维持时间较长。
According to the law of conservation in the state of turbulent flow, the differential equation describing the airflow temperature distribution in drifting tunnel is derived.
根据紊流状态下的守恒原理，导出了描述掘进巷道风流紊流流动和温度分布的微分方程。
According to the principle of conservation, differential equation which can describe airflow temperature distribution in state of turbulent flow in mine working face is deduced.
从守恒原理出发，导出了描述矿井回采工作面风流紊流流动和温度分布的微分方程。
Airflow in underground railway station platforms is turbulent. Boundary conditions and proper turbulence model are required to determine when adopting CFD to simulate platform ventilation.
地铁站台的气流流动属湍流流动，采用CFD对站台通风方式进行模拟时需要确定相关的边界条件和适用的湍流模型。
The airflow in subway station is complicated three-dimensional unsteady turbulent flow.
地铁车站内的空气流动是极其复杂的三维非稳态湍流流动。
This paper analyzes and simulates the effect of the air change rate per hour (ACH) on contamination diffusion airflow field in turbulent clean-room of hole-board ventilation by using CFD.
针对孔板送风的乱流洁净室，运用C FD软件对不同换气次数条件下的气流组织和污染物扩散进行数值模拟分析。
This paper analyzes and simulates the effect of the air change rate per hour (ACH) on contamination diffusion airflow field in turbulent clean-room of hole-board ventilation by using CFD.
针对孔板送风的乱流洁净室，运用C FD软件对不同换气次数条件下的气流组织和污染物扩散进行数值模拟分析。
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