IAPS84: High precision equation of state for water vapor, with a deviation rate of 15-20% for specific heat and sound speed obtained according to the second law of thermodynamics
Notes:（See image for details）
1. Deviation rate between water vapor thermal properties table IAPS84 and experiment
2. The accuracy of the state equation is very high, with specific heat and sound velocity obtained according to the second law of thermodynamics (Formula 1) ranging from 15% to 20%.
3. In Formula 1, "dP/dT * T" is the contribution of the second law of thermodynamics, which separates the "dP/dT * T" in sound velocity and specific heat and estimates a deviation rate of 40-50% through experimental comparison.
4. The water vapor thermal properties table IAPWS97 has made great progress, which is due to the combination of data.
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It presents a simplified yet insightful Modified Euler’s method for solving differential equations and an physical applications on it.
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[https://www.researchgate.net/publication/390947672_A_Numerical_Simulation_of_Spherical_Tank_Drainage_Using_the_Modified_Euler_Method_A_Physics-Based_Approach ]
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