【摘要】 本文根据Lennard-Jones(LJ)势,modified Buckingham(exp-6)势,Silvera-Goldman(SG)势和Nellis et al.(NEL)势,计算氢流体的第二维里系数,并从第二维里系数求得波义耳温度、焦耳-汤姆森效应的转变温度,并与实验结果进行了比较。最后评价了各种互作用势在不同温度下的适用性:LJ势在高温下有极好的结果,但在低温下误差较大;其中NEL势在低温下与实验结果符合得最好,SG势次之,但这两种势在高温下都不好;exp-6势在高温下不如LJ势,而在低温下是最糟的。更多还原

【Abstract】 Calculations of the second virial coefficient of hydrogen fluid were performed by using four intermolecular potentials, Lennard-Jones (LJ), modified Buckingham (exp-6), Silvera-Goldman (SO) and Nellis et al (NBL). The Boyle temperatures and the inversion temperatares of the Joule-Thomson effect were found from the second virial coefficient. After comparing all ’the above results with the experimental data, we appraised the availability of these intermolecular potentials at different temperature regions, finding that LJ potential is excellent at high temperature, but invites great errors at low temperature; NBL potential is the best in conformation with the experimental results at low temperature, the SG potential is better at the same region, and both of them are not very good at high temperature; exp-6 potential is not as good as LJ potential at high temperature, and is the worst at low temperature.更多还原