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1、气体自由程与输运系数的研究气体自由程与输运系数的研究摘 要：气体分子自由程和输运系数是分子运动论的基本内容，它们在现代物理的许多分支中仍必不可少，但在现行教科书上对它们的证明及推导过于粗糙很难让学生理解与掌握。针对这些缺点本文在现行的教材以及相关参考文献的基础上，首先根据麦克斯韦速率分布推导出气体分子自由程，然后在计算推导实际气体分子输运系数时介绍1 种比较好的势模型 Tang-Toennies(TT)势模型为分子相互作用势，在此基础上提出了用物理力学方法计算输运系数中关键的碰撞积分公式，并给出了碰撞积分公式中1 些参数的确定以及关系 , 最后得出输运系数的表达式并计算出结果。把计算结果与理想
2、气体输运系数的对比分析。计算结果与理论值比较相符，同时说明选择TT 势模型的正确性。关键词：气体分子；自由程；输运系数；相互作用势Research with the freepath of gas and transferfactorAbstract: Gasmolecules and free transport coefficients-molecular-kinetic theory is the basic content. Modern physics in many branches still essential. However, the existing textbooks
3、of their derivation proved too rough and difficult for students to understand and grasp. These papers address these shortcomings on the basis of the existing reference materials and related documents. First According to Maxwells distribution rate of gas moleculesderived free path, Then in the calcul
4、ation of actual gasmolecules derived transport coefficients introduced arelatively good potential model Tang-Toenni es (TT)potential model for the molecular interaction potential,On this basis the use of physical and mechanicaltransport coefficients calculated key collision integralformula and gives
5、 the collision integral formula todetermine the number of parameters and relationshipsCame to the conclusion that the transport coefficientscalculated expression results. Compared to the resultsand the ideal gas transport coefficients are Calculationresults are consistent with theoretical values, an
6、dchoose TT potential model is correct.Key words: Gas molecules; Free path; Transferfactor;Interaction Potential .，气体自由程与输运系数的研究摘 要：气体分子自由程和输运系数是分子运动论的基本内容，它们在现代物理的许多分支中仍必不可少，但在现行教科书上对它们的证明及推导过于粗糙很难让学生理解与掌握。针对这些缺点本文在现行的教材以及相关参考文献的基础上，首先根据麦克斯韦速率分布推导出气体分子自由程，然后在计算推导实际气体分子输运系数时介绍 1 种比较好的势模型 Tang-Toennie
7、s(TT) 势模型为分子相互作用势，在此基础上提出了用物理力学方法计算输运系数中关键的碰撞积分公式，并给出了碰撞积分公式中 1 些参数的确定以及关系 , 最后得出输运系数的表达式并计算出结果。把计算结果与理想气体输运系数的对比分析。计算结果与理论值比较相符，同时说明选择TT 势模型的正确性。关键词：气体分子；自由程；输运系数；相互作用势Research with the freepath of gas and transferfactorAbstract: Gasmolecules and free transport coefficients-molecular-kinetic theory
8、 is the basic content. Modern physics in many branches still essential. However, the existing textbooks of their derivation proved too rough and difficult for students to understand and grasp. These papers address these shortcomings on the basis of the existing reference materials and related docume
9、nts. First According to Maxwells distribution rate of gas molecules derived free path, Then in the calculation of actual gas molecules derived transport coefficients introduced a relatively good potential model Tang-Toenni es (TT) potential model for the molecular interaction potential, On this basi
10、s the use of physical and mechanical transport coefficients calculated key collision integral formula and gives the collision integral formula todetermine the number of parameters and relationships ， Came to the conclusion that the transport coefficients calculated expression results. Compared to the resultsand the ideal gas transport coefficients are Calculation results are consistent with theoretical values, and choose TT potential model is correct.Key words: Gas molecules; Free path; Transferfactor;Interaction Potential .