近自由分子流中物体阻力的动力学理论
Kinetic Theory of Drag on Objects in Nearly Free Molecular Flow
摘要:
使用的密度之间的类比中等密度气体的输运系数和逆克努森数膨胀的物体上的阻力在几乎自由的分子流,我们制定的碰撞积分,确定第一个修正项的自由分子阻力极限。然后,我们展示了如何的程序可以应用到计算的阻力系数的一个定向盘和一个球体的速度比的函数。
英文摘要:
Using an analogy between the density expansion of the transport coefficients of moderately dense gases and the inverse-Knudsen-number expansion of the drag on objects in nearly free molecular flows, we formulate the collision integrals that determine the first correction term to the free-molecular drag limit. We then show how the procedure can be applied to calculate the drag coefficients of an oriented disc and a sphere as a function of the speed ratio.
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