Thermal-wave resonant cavity measurement of the thermodynamic equation of state and the pressure dependence of thermophysical properties of air

1999 ◽  
Author(s):  
Andreas Mandelis ◽  
Guang Pan
Keyword(s):  
Equation Of State ◽  
Pressure Dependence ◽  
Thermophysical Properties ◽  
Thermal Wave ◽  
Resonant Cavity ◽  
Thermodynamic Equation ◽  
Cavity Measurement

scholarly journals Thermophysical properties of seawater: A review and new correlations that include pressure dependence

Desalination ◽  
2016 ◽  
Vol 390 ◽  
pp. 1-24 ◽  
Author(s):  
Kishor G. Nayar ◽  
Mostafa H. Sharqawy ◽  
Leonardo D. Banchik ◽  
John H. Lienhard V
Keyword(s):  
Pressure Dependence ◽  
Thermophysical Properties

scholarly journals The Unresolved Definition of The Pressure-Viscosity Coefficient

2021 ◽  
Author(s):  
Scott Bair
Keyword(s):  
High Temperature ◽  
Equation Of State ◽  
Low Temperature ◽  
Film Thickness ◽  
Pressure Dependence ◽  
Analytical Calculation ◽  
Elastohydrodynamic Lubrication ◽  
Viscosity Coefficient ◽  
Classical Approach ◽  
Definition Of

Abstract In the classical approach to elastohydrodynamic lubrication (EHL) a single parameter, the pressure-viscosity coefficient, quantifies the isothermal pressure dependence of the viscosity for use in prediction of film thickness. Many definitions are in current use. Progress toward a successful definition of this property has been hampered by the refusal of those working in classical EHL to acknowledge the existence of accurate measurements of the piezoviscous effect that have existed for nearly a century. The Hamrock and Dowson pressure-viscosity coefficient at high temperature requires knowledge of the piezoviscous response at pressures which exceed the inlet pressure and may exceed the Hertz pressure. The definition of pressure-viscosity coefficient and the assumed equation of state must limit the use of the classical formulas, including Hamrock and Dowson, to liquids with high Newtonian limit and to low temperature. Given that this problem has existed for at least fifty years without resolution, it is reasonable to conclude that there is no definition of pressure-viscosity coefficient that will quantify the piezoviscous response for an analytical calculation of EHL film thickness at temperatures above ambient.

A modified Anderson–Grüneisen model for the pressure dependence of thermal expansivity

2020 ◽  
Vol 98 (8) ◽  
pp. 813-817
Author(s):  
A. Dwivedi
Keyword(s):  
Equation Of State ◽  
Boundary Conditions ◽  
Pressure Dependence ◽  
Entire Range ◽  
Thermal Expansivity ◽  
Temperature Data ◽  
Elevated Pressures

The Anderson–Grüneisen theory of the thermal expansivity of solids has been modified so as to make it applicable for the entire range of compressions down to extreme compression in the limit of infinite pressure. The formulation for the pressure dependence of thermal expansivity has been developed using the thermodynamic constraints at boundary conditions. The volume–pressure–temperature data obtained from the Stacey reciprocal [Formula: see text] equation of state are used to determine the thermal expansivity of NaCl and MgO at simultaneously elevated pressures and temperatures. The results have been discussed and compared with recent studies.

Lattice Dynamical Prediction of the Elastic Constants of Diamond

1996 ◽  
Vol 453 ◽  
Author(s):  
Robert R. Reeber
Keyword(s):  
Equation Of State ◽  
Elastic Constants ◽  
Thermophysical Properties ◽  
Room Temperature ◽  
Interatomic Potential ◽  
Dynamical Theory ◽  
Potential Models ◽  
Dimensional Lattice ◽  
One Dimensional ◽  
Metastable Material

AbstractThe thermophysical properties of diamond, a metastable material at room temperature, are difficult to measure at high temperatures. These properties are of interest for testing equation of state and interatomic potential models. Here we utilize a geometrical lattice transformation, one dimensional lattice dynamical theory, and the principle of corresponding states to calculate the elastic constants of diamond over an extended temperature range.

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