A correlation of free volume of saturated vapor with that of coexisting liquid phase is derived from the cell theory of flulds. Then this correlation is combined with a revised free volume model proposed by this autho...A correlation of free volume of saturated vapor with that of coexisting liquid phase is derived from the cell theory of flulds. Then this correlation is combined with a revised free volume model proposed by this author for viscosity and thermal conductivity, equations are derived which correlate the viscosities and thermal conductivities of coekisting vapors and liqueds with heat of vaporization and temperature. The literature data for 44 representative substances are used to test the equations and the results are satisfactory. It can be seen from this work that there might exist some relations between the transport properties of vapors and those of coexisting liquids.展开更多
This paper proposes a method of testing the free volume models for fluid transport properties by the MD simulation data for square well fluids. Several commouly used free volume models for viscosity and thermal conduc...This paper proposes a method of testing the free volume models for fluid transport properties by the MD simulation data for square well fluids. Several commouly used free volume models for viscosity and thermal conductivity are evaluated by the method,and the results show that the model proposed by this author is superior to others. Two important conclusions have been derived: a unified model can be applied to both viscosity and thermal conductivity, and the transport properties of liquld and gas (vapor) phases can be correlated simultaniously by the model with whfied parameters. The conclusions approached here are of significance to the systems of practical interests.展开更多
文摘A correlation of free volume of saturated vapor with that of coexisting liquid phase is derived from the cell theory of flulds. Then this correlation is combined with a revised free volume model proposed by this author for viscosity and thermal conductivity, equations are derived which correlate the viscosities and thermal conductivities of coekisting vapors and liqueds with heat of vaporization and temperature. The literature data for 44 representative substances are used to test the equations and the results are satisfactory. It can be seen from this work that there might exist some relations between the transport properties of vapors and those of coexisting liquids.
文摘This paper proposes a method of testing the free volume models for fluid transport properties by the MD simulation data for square well fluids. Several commouly used free volume models for viscosity and thermal conductivity are evaluated by the method,and the results show that the model proposed by this author is superior to others. Two important conclusions have been derived: a unified model can be applied to both viscosity and thermal conductivity, and the transport properties of liquld and gas (vapor) phases can be correlated simultaniously by the model with whfied parameters. The conclusions approached here are of significance to the systems of practical interests.
