On the Application of a Simplified Temperature-Dependent Friction-Theory Viscosity Model in Compositional and Thermal-Compositional Reservoir Simulations

2019 ◽  
Author(s):  
Hussein Alboudwarej ◽  
Jonathan M. Sheffield ◽  
Viet Hoang ◽  
Carla Co ◽  
Colin L. Schroeder ◽  
...  
Keyword(s):  
Viscosity Model ◽  
Temperature Dependent ◽  
Reservoir Simulations ◽  
Friction Theory

One-parameter friction theory viscosity model for the cubic-plus-chain equation of state

2021 ◽  
Vol 530 ◽  
pp. 112896 ◽  
Author(s):  
Yash Khemka ◽  
Caleb J. Sisco ◽  
Mohammed I.L. Abutaqiya ◽  
Walter G. Chapman ◽  
Francisco M. Vargas
Keyword(s):  
Equation Of State ◽  
Viscosity Model ◽  
Friction Theory ◽  
Chain Equation

scholarly journals Temperature-Dependent Viscosity Model for Silicone Oil and Its Application in Viscous Dampers

Processes ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 331
Author(s):  
Márk Venczel ◽  
Gabriella Bognár ◽  
Árpád Veress
Keyword(s):  
Shear Rate ◽  
Torsional Vibration ◽  
Transient Flow ◽  
Silicone Oil ◽  
Viscosity Model ◽  
Working Fluid ◽  
Oil Viscosity ◽  
Temperature Dependent ◽  
Wide Range ◽  
Dependent Viscosity

Silicone fluids belong to the group of pseudoplastic non-Newtonian fluids with complex rheological characteristics. They are considered in basic and applied researches and in a wide range of industrial applications due to their favorable physical and thermal properties. One of their specific field of applications in the automotive industry is the working fluid of viscous torsional vibration dampers. For numerical studies in the design and development phase of this damping product, it is essential to have thorough rheological knowledge and mathematical description about the silicone oil viscosity. In the present work, adopted rheological measurement results conducted on polydimethylsiloxane manufactured by Wacker Chemie with initial viscosity of 1000 Pas (AK 1 000 000 STAB silicone oil) are processed. As a result of the parameter identification by nonlinear regression, the temperature-dependent parameter curves of the Carreau–Yasuda non-Newtonian viscosity model are generated. By implementing these parameter sets into a Computational Fluid Dynamics (CFD) software, a temperature- and shear-rate-dependent viscosity model of silicone fluid was tested, using transient flow and thermal simulations on elementary tube geometries in the size range of a real viscous torsional vibration damper’s flow channels and filling chambers. The numerical results of the finite volume method provide information about the developed flow processes, with especial care for the resulted flow pattern, shear rate, viscosity and timing.

General friction theory viscosity model for the PC-SAFT equation of state

AIChE Journal ◽  
2006 ◽  
Vol 52 (4) ◽  
pp. 1600-1610 ◽  
Author(s):  
Sergio E. Quiñones-Cisneros ◽  
Claus K. Zéberg-Mikkelsen ◽  
Josefa Fernández ◽  
Josefa García
Keyword(s):  
Equation Of State ◽  
Viscosity Model ◽  
Friction Theory

(111) Monocrystalline Nickel Films

1972 ◽  
Vol 30 ◽  
pp. 512-513
Author(s):  
T.E. Pratt ◽  
R.W. Vook
Keyword(s):  
Film Thickness ◽  
Deposition Rate ◽  
Room Temperature ◽  
Narrow Range ◽  
High Vacuum ◽  
Residual Pressure ◽  
Temperature Dependent ◽  
Deposition Parameters ◽  
Transmission Electron ◽  
Substrate Temperatures

(111) oriented thin monocrystalline Ni films have been prepared by vacuum evaporation and examined by transmission electron microscopy and electron diffraction. In high vacuum, at room temperature, a layer of NaCl was first evaporated onto a freshly air-cleaved muscovite substrate clamped to a copper block with attached heater and thermocouple. Then, at various substrate temperatures, with other parameters held within a narrow range, Ni was evaporated from a tungsten filament. It had been shown previously that similar procedures would yield monocrystalline films of CU, Ag, and Au.For the films examined with respect to temperature dependent effects, typical deposition parameters were: Ni film thickness, 500-800 A; Ni deposition rate, 10 A/sec.; residual pressure, 10-6 torr; NaCl film thickness, 250 A; and NaCl deposition rate, 10 A/sec. Some additional evaporations involved higher deposition rates and lower film thicknesses.Monocrystalline films were obtained with substrate temperatures above 500° C. Below 450° C, the films were polycrystalline with a strong (111) preferred orientation.

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