Critical analysis of viscosity data of thermal argon plasmas at atmospheric pressure

1996 ◽  
Vol 16 (4) ◽  
pp. 635-650 ◽  
Author(s):  
W. L. T. Chen ◽  
J. Heberlein ◽  
E. Pfender
Keyword(s):  
Atmospheric Pressure ◽  
Critical Analysis ◽  
Viscosity Data ◽  
Argon Plasmas

TEMPERATURE EFFECT ON DENSITY AND VISCOSITY OF LIGHT, MEDIUM, AND HEAVY CRUDE OILS

2020 ◽  
Author(s):  
D Sagdeev ◽  
◽  
Ch. Isyanov ◽  
I Gabitov ◽  
V Khairutdinov ◽  
...  
Keyword(s):  
Crude Oil ◽  
Atmospheric Pressure ◽  
Oil Field ◽  
Viscosity Data ◽  
Rotational Viscometer ◽  
Correct Operation ◽  
Hydrostatic Weighing ◽  
Weighing Method ◽  
Light Medium ◽  
Measured Density

The density and dynamic viscosity of four light, medium, and heavy (extra-viscous) crude oil samples from Tatarstan Oil Field (Russian Federation) have been measured over the temperature range from (293 to 473) K (for density) and from (293 to 348) K (for viscosity) at atmospheric pressure (101 kPa). The density measurements were made using a new densimeter based on hydrostatic weighing method. The viscosity measurements of the same crude oil samples were made us-ing Brookfield rotational viscometer (DV-II+PRO, LVD-II+PRO). The combined expanded uncertainty of the density, viscosity, atmospheric pressure, and temperature measurements at 0.95 confidence level with a coverage factor of k = 2 is estimated to be 0.16 %, 1.0 %, 1.0 %, and 20 mK, respectively. For validation of the reliability and accuracy of the measured density data and correct operation of the new densimeter, all oil samples were measured using the pycnometric method. The present study showed that the densities measured using the new hydrostatic weighing densimeter (HWD) are agree with the values obtained with pycnometric method within (0.03 to 0.14) %. The measured density and viscosity data were used to develop widerange correlations as a function of temperature and API characteristics. The measured densities were represented using simple function of temperature (polynomial type) with API gravity dependent parameters with an accuracy of AAD within from (0.10 to 0.18) %. The measured viscosity data were also used to develop linear Arrhenius and VTF models. API gravity dependence of the Arrhenius parameters was studied.

scholarly journals Viscosity–Temperature–Pressure Relationship of Extra-Heavy Oil (Bitumen): Empirical Modelling versus Artificial Neural Network (ANN)

Energies ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2390 ◽  
Author(s):  
Olalekan Alade ◽  
Dhafer Al Shehri ◽  
Mohamed Mahmoud ◽  
Kyuro Sasaki
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Heavy Oil ◽  
Atmospheric Pressure ◽  
Predictive Accuracy ◽  
Empirical Models ◽  
Viscosity Data ◽  
Ann Model ◽  
Artificial Neural ◽  
Artificial Neural Network Ann

The viscosity data of two heavy oil samples X and Y, with asphaltene contents 24.8% w/w and 18.5% w/w, respectively, were correlated with temperature and pressure using empirical models and the artificial neural network (ANN) approach. The viscosities of the samples were measured over a range of temperatures between 70 °C and 150 °C; and from atmospheric pressure to 7 MPa. It was found that the viscosity of sample X, at 85 °C and atmospheric pressure (0.1 MPa), was 1894 cP and that it increased to 2787 cP at 7 MPa. At 150 °C, the viscosity increased from 28 cP (at 0.1 MPa) to 33 cP at 7 MPa. For sample Y, the viscosity at 70 °C and 0.1 MPa increased from 2260 cP to 3022 cP at 7 MPa. At 120 °C, the viscosity increased from 65 cP (0.1 MPa) to 71 cP at 7 MPa. Notably, using the three-parameter empirical models (Mehrotra and Svrcek, 1986 and 1987), the correlation constants obtained in this study are very close to those that were previously obtained for the Canadian heavy oil samples. Moreover, compared to other empirical models, statistical analysis shows that the ANN model has a better predictive accuracy (R2 ≈ 1) for the viscosity data of the heavy oil samples used in this study.

Generation of Microwave Capillary Argon Plasmas at Atmospheric Pressure

2016 ◽  
Vol 44 (11) ◽  
pp. 2603-2607
Author(s):  
Kadek W. Hemawan ◽  
Derek W. Keefer ◽  
John V. Badding ◽  
Russell J. Hemley
Keyword(s):  
Atmospheric Pressure ◽  
Argon Plasmas

scholarly journals Study of Molecular Interaction for Antibiotic Drug with Sugar Solutions at Different Temperature

2020 ◽  
Vol 10 (01) ◽  
pp. 170-174 ◽  
Author(s):  
Sundus H. Merza ◽  
Nagham H. Abood ◽  
Ahamed M. Abbas
Keyword(s):  
Aqueous Solutions ◽  
Molar Volume ◽  
Atmospheric Pressure ◽  
Apparent Molar Volume ◽  
Viscosity Data ◽  
Free Energy Of Activation ◽  
Ternary Solutions ◽  
Antibiotic Drug ◽  
Solute Interactions ◽  
Molar Expansibility

The interactions of drug amoxicillin with maltose or galactose solutions with a variation of temperature have been discussed by taking in the volumetric and viscometric procedures. Physical properties [densities (ρ) and viscosities (η)] of amoxicillin (AMOX) aqueous solutions and aqueous solutions of two type saccharides (maltose and galactose 0.05m) have been measured at T = (298.15, 303.15 and 308.15) K under atmospheric pressure. The apparent molar volume (ϕv cm3mole-1) has been evaluated from density data and fitted to a Redlich-Mayer equation. The empirical parameters of the Mayer-Redlich equation and apparent molar volume at infinite dilution Ø°v were explicated in terms of interactions from type solute-solvent and solute–solute interactions. Transfer molar volume ΔtraØ°v for AMOX from water to aqueous maltose and galactose solutions were calculated to comprehend different interactions in the ternary solutions. Limiting apparent molar expansibility (Ø°E) and Hepler’s coefficient was also calculated to indicate the structure making ability of AMOX in the ternary solutions. Jones–Dole coefficient B and A have been calculated from viscosity data by employing the Jones–Dole equation. The free energy of activation of viscous flow per mole of the solute (Δμ°2*) and solvent (Δμ°1*) have been explained on the basis of the Eyring and Feakins equation.

On the rotational–translational equilibrium in non-thermal argon plasmas at atmospheric pressure

2021 ◽  
Vol 30 (3) ◽  
pp. 035020
Author(s):  
Francis Labelle ◽  
Antoine Durocher-Jean ◽  
Luc Stafford
Keyword(s):  
Atmospheric Pressure ◽  
Argon Plasmas

Temperature and Concentration Dependence of Viscosity of Binary Mixtures of PEG-1000 + water

2016 ◽  
Vol 12 (2) ◽  
Author(s):  
Debasmita Dash ◽  
C. Mallika ◽  
U. Kamachi Mudali
Keyword(s):  
Activation Energy ◽  
Binary Mixtures ◽  
Atmospheric Pressure ◽  
Measured Data ◽  
Repulsive Force ◽  
Viscosity Data ◽  
Solvent Interactions ◽  
Increase With Increase ◽  
Polyethylene Glycol 1000 ◽  
Solvent Molecules

Abstract Viscosities of binary mixtures of polyethylene glycol-1000 (PEG-1000) and water were measured precisely in the temperature range 293.15–343.15 K at atmospheric pressure using a high precision viscometer. Viscosity data were used to calculate the activation energy of viscous flow. The activation energy was observed to increase with increase in the concentration of aqueous solutions of PEG which indicated that more energy is required to move the molecule inside the structure with increase in concentration. The measured data provided better understanding to explain the behaviour of macromolecules with respect to change in concentration and temperature. The results were discussed in the light of polymer-solvent interactions. At lower concentration range, the molecules exhibit weak interaction due to dominant repulsive force and at higher concentration the entanglement of polymer chain increases. In view of greater force of interaction between solute and solvent molecules forming hydrogen bonding, there will be an increase in interaction with temperature and concentration.

On the differences between ionizing helium and argon plasmas at atmospheric pressure

2002 ◽  
Vol 12 (1) ◽  
pp. 30-38 ◽  
Author(s):  
Jeroen Jonkers ◽  
Marco van de Sande ◽  
Antonio Sola ◽  
Antonio Gamero ◽  
Joost van der Mullen
Keyword(s):  
Atmospheric Pressure ◽  
Argon Plasmas
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