Rotational Relaxation in Fluids
Rotational Relaxation in Fluids
复制标题
流体中的旋转弛豫
DOI：
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发表时间：
1970
期刊：
影响因子：
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通讯作者：
I. Oppenheim
中科院分区：
文献类型：
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作者：
D. Kivelson;M. Kivelson;I. Oppenheim
本文给出了角动量和重定向关联时间的表达式。角动量相关时间的倒数与两项的总和有关，其中一项涉及介质的剪切粘度，另一项描述分子的进动弛豫。推导是基于施加在感兴趣的分子上的扭矩和力的时间依赖性的相似性。重取向相关时间与扩散和近扩散极限中的角动量弛豫时间有关。这里得到的表达式已证实了一些ESR实验。
In this paper a number of expressions for angular momentum and reorientation correlation times are obtained. The inverse of the angular momentum correlation time is related to a sum of two terms, one of which involves the shear viscosity of the medium and the other of which describes the precessional relaxation of the molecule. The derivation is based on the similarity of the time dependences of the torque and the force exerted on the molecule of interest. The reorientation correlation time is related to the angular momentum relaxation time in the diffusion and the near‐diffusion limits. The expressions obtained here have been confirmed by a number of ESR experiments.