粒子海中物体的速度阻力判据
Velocity Reversal Criterion of a Body Immersed in a Sea of Particles
摘要：
我们考虑一个刚体与一个连续质点碰撞。我们假设物体以接近平衡速度V_{\infty}的速度运动，并且与物体碰撞的粒子漫反射，也就是说，概率上具有某种概率分布K。我们找到一个充分且几乎必要的条件，即碰撞粒子的集体力使物体的相对速度V（t）反向，即在物体接近平衡之前改变V（t）- V_{\infty}的符号。给出了反转和非反转的例子。这与仅发生反转的纯镜面反射情况形成强烈对比。
英文摘要：
We consider a rigid body colliding with a continuum of particles. We assume that the body is moving at a velocity close to an equilibrium velocity V_{\infty} and that the particles colliding with the body reflect diffusely, that is, probabilistically with some probablility distribution K. We find a condition that is sufficient and almost necessary that the collective force of the colliding particles reverses the relative velocity V(t) of the body, that is, changes the sign of V(t)-V_{\infty}, before the body approaches equilibrium. Examples of both reversal and irreversal are given. This is in strong contrast with the pure specular reflection case in which only reversal happens.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
