Equation of State for Multi-Component Mixture
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摘要: 根据等温等压的热力学平衡条件及体积相加原理,建立了一种多组元混合物状态方程理论模型,基于单质的状态方程,得到混合物的内能、压力、定容比热容、压强系数、等温声速等。采用该模型计算了一种4组元钨合金的状态方程,与状态方程库提供的合金状态方程符合得较好。Abstract: An equation-of-state (EOS) calculation model was presented for a multi-component mixture by assuming that all components of the mixture are in a locally thermodynamic equilibrium state, which means that they are isothermal and isobaric, and that the sub-volume of each component is additive. Thermodynamic quantities of the mixture, such as internal energy, pressure, constant-volume specific heat, pressure coefficient and isothermal sound speed, can be constructed with the EOS of each component. Based on this model, we calculated the EOS of a 4-component tungsten alloy, which is remarkably consistent with the result achieved from the wide-range equation of state.
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Key words:
- mixture /
- equation of state /
- isothermal-isobaric /
- volume additivity
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