Acoustic nonlinearity calculations using the Tait equation of state

1998 ◽  
Vol 103 (5) ◽  
pp. 3080-3080
Author(s):  
Bruce Hartmann ◽  
Gilbert F. Lee ◽  
Edward Balizer
Keyword(s):  
Equation Of State ◽  
Tait Equation ◽  
Acoustic Nonlinearity ◽  
Tait Equation Of State

Revisiting the Compressibility of Oil/Refrigerant Lubricants

2016 ◽  
Vol 139 (2) ◽  
Author(s):  
Scott Bair ◽  
Mark Baker ◽  
David M. Pallister
Keyword(s):  
High Pressure ◽  
Equation Of State ◽  
Master Curve ◽  
Pressure Measurements ◽  
Tait Equation ◽  
Tait Equation Of State ◽  
Metal Bellows ◽  
Volume Compression ◽  
Volumetric Behavior ◽  
Usual Problem

A fixture was fabricated for the purpose of restraining the expansion of an existing metal bellows piezometer so that a refrigerant and oil mixture can be admitted under pressure. Measurements on a polyol ester (POE) with 9.2 wt.% of R134a show that the addition of refrigerant slightly increases compressibility. The previously reported reduction in compressibility (increase in bulk modulus) by Tuomas and Isaksson (2006, “Compressibility of Oil/Refrigerant Lubricants in Elasto-Hydrodynamic Contacts,” ASME J. Tribol., 128(1), pp. 218–220) of an ISO 68 POE when mixed with R134a cannot be supported by precise measurements of the volume compression. The increased compressibility found by Comuñas and co-workers (2002, “High-Pressure Volumetric Behavior of x 1, 1, 1, 2-Tetrafluoroethane + (1 − x) 2, 5, 8, 11, 14-Pentaoxapentadecane (TEGDME) Mixtures,” J. Chem. Eng. Data, 47(2), pp. 233–238) is the correct trend. The Tait equation of state (EoS) has been fitted to the data for both the neat POE and its 9.2% by weight mixture with refrigerant. The usual problem was encountered for the mixture with the Tait EoS at low pressure where the compressibility becomes greater than predicted due to proximity to the vapor dome. The measured relative volumes of the mixture can be used to collapse the viscosity to a master curve when plotted against the Ashurst–Hoover thermodynamic scaling parameter. The thermodynamic scaling interaction parameter is approximately the same as for the neat oil.

scholarly journals Modeling of pvT behavior of semi-crystalline polymer based on the two-domain Tait equation of state for injection molding

2019 ◽  
Vol 183 ◽  
pp. 108149 ◽  
Author(s):  
Jian Wang ◽  
Christian Hopmann ◽  
Mauritius Schmitz ◽  
Tobias Hohlweck ◽  
Jens Wipperfürth
Keyword(s):  
Equation Of State ◽  
Injection Molding ◽  
Crystalline Polymer ◽  
Tait Equation ◽  
Tait Equation Of State ◽  
Pvt Behavior

Equation of State and Thermodynamic Properties of Molten Potassium Chloride to 1320 K and 6 kbar

1976 ◽  
Vol 31 (7) ◽  
pp. 769-776 ◽  
Author(s):  
G. Goldmann ◽  
K. Tödheide
Keyword(s):  
Equation Of State ◽  
Potassium Chloride ◽  
Molten Salts ◽  
Isothermal Compressibility ◽  
Constant Pressure ◽  
Tait Equation ◽  
Density Data ◽  
Pvt Data ◽  
Simulation Results ◽  
Experimental Density

Abstract From the Tait equation an equation of state containing five adjustable parameters was developed which fits experimental density data of molten potassium chloride to 1320 K and 6 kbar with a standard deviation of 0.04%. The thermal expansion coefficient, isothermal compressibility, internal pressure, and molar heat capacities at constant pressure and constant volume were calculated as functions of pressure and temperature from the equation of state and were compared with computer simulation results. A method for an estimate of high-pressure PVT data for molten salts is suggested which yields results superior to the best computed data presently available.

Densities of Amorphous Polymers at High Pressures

1976 ◽  
Vol 49 (2) ◽  
pp. 207-209
Author(s):  
S. Beret ◽  
J. M. Prausnitz
Keyword(s):  
Experimental Data ◽  
High Pressure ◽  
Equation Of State ◽  
Rational Design ◽  
High Pressures ◽  
Amorphous Polymers ◽  
Low Pressure ◽  
Experimental Results ◽  
Tait Equation ◽  
Simple Method

Abstract Experimentally determined densities and compressibilities of amorphous polymers are frequently available; but, because of experimental difficulties, few experimental results have been reported at high pressures. Such densities, however, are sometimes required for rational design of extrusion and similar processes. We report here a simple method for estimating densities and compressibilities at high pressures from experimental compressibilities at low pressure. Our method is based on a relation for liquids suggested by Wada and developed by Chueh and Prausnitz. The purpose of this note is to suggest a method for estimating polymer densities at high pressure wherever experimental data are insufficient for obtaining parameters needed in an equation of state, as, for example, the Tait equation.

Equation of state for hard convex body fluid mixtures

1998 ◽  
Vol 94 (5) ◽  
pp. 809-814 ◽  
Author(s):  
C. BARRIO ◽  
J.R. SOLANA
Keyword(s):  
Equation Of State ◽  
Convex Body ◽  
Body Fluid ◽  
Fluid Mixtures

Equation of state of shock compressed liquid deuterium

2000 ◽  
Vol 10 (PR5) ◽  
pp. Pr5-281-Pr5-286
Author(s):  
M. Ross ◽  
L. H. Yang ◽  
G. Galli
Keyword(s):  
Equation Of State ◽  
Compressed Liquid

ON THE EQUATION OF STATE OF THE WIGNER MODEL

1980 ◽  
Vol 41 (C2) ◽  
pp. C2-83-C2-83
Author(s):  
Ph. Choquard
Keyword(s):  
Equation Of State
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