Determination of Insulating Properties of SO2 gas from BOLSIG+ Calculated Swarm Transport Coefficients

2021 ◽  
Author(s):  
Akhilesh Kumar Pandey ◽  
Pushpendra Singh ◽  
Mohd. Shahnawaz Khan ◽  
Jitendra Kumar Singh
Keyword(s):  
Transport Coefficients ◽  
Insulating Properties ◽  
So2 Gas

Anomalous transport coefficients in a magnetized turbulent plasma

1982 ◽  
Vol 28 (2) ◽  
pp. 193-214 ◽  
Author(s):  
Qiu Xiaoming ◽  
R. Balescu
Keyword(s):  
Transport Coefficients ◽  
Collision Operator ◽  
Turbulent Plasma ◽  
Anomalous Transport ◽  
Weak Turbulence ◽  
Dissipative Effects ◽  
Dependent Transport ◽  
Two Fluid ◽  
Two Fluid Plasma

In this paper we generalize the formalism developed by Balescu and Paiva-Veretennicoff, valid for any kind of weak turbulence, for the determination of all the transport coefficients of an unmagnetized turbulent plasma, to the case of a magnetized one, and suggest a technique to avoid finding the inverse of the turbulent collision operator. The implicit plasmadynamical equations of a two-fluid plasma are presented by means of plasmadynamical variables. The anomalous transport coefficients appear in their natural places in these equations. It is shown that the necessary number of transport coefficients for describing macroscopically the magnetized turbulent plasma does not exceed the number for the unmagnetized one. The typical turbulent and gyromotion terms, representing dissipative effects peculiar to the magnetized system, which contribute to the frequency-dependent transport coefficients are clearly exhibited.

Determination of transport constants of isolated Nitella cell walls

1968 ◽  
Vol 46 (4) ◽  
pp. 317-327 ◽  
Author(s):  
M. T. Tyree
Keyword(s):  
Activation Energy ◽  
Cell Wall ◽  
Diffusion Coefficient ◽  
Cell Walls ◽  
Transport Coefficients ◽  
Irreversible Thermodynamics ◽  
Kcal Mole ◽  
Limiting Value ◽  
Nitella Flexilis

Transport coefficients LPP, LPE, LEP, and LEE for electrokinetic equations according to irreversible thermodynamics, the Onsager coefficients, were measured for isolated Nitella flexilis cell walls in KCl solutions ranging from 10−4 to 100 normal. LPP and LPE (= LEP) were found to be independent of KCl concentration and equal to 1.4 × 10−6 cm3 sec−1 cm−2 (joule cm−3)−1 cm and 6 × 10−5 cm3 sec−1 cm−2 volt−1 cm respectively. LEE was a function of the salt concentration, reaching a limiting value of about 1.2 × 10−3 mho cm−1 in 10−4 N KCl. The activation energy for movement of KCl in cell walls was found to be 4.33 Kcal mole−1; the diffusion coefficient for KCl in cell walls was calculated by two methods to be 8 × 10−6 cm2 sec−1; and the concentration of the fixed ions in Nitella cell walls from the above data was estimated at greater than 0.04 equivalent per liter of cell wall. Electroosmosis in Nitella membranes is re-examined in the light of the measured transport coefficients and it is concluded that under proper conditions the cell wall of Nitella can contribute significantly (~20% or more) to the observed electroosmosis of living Nitella cells.

Determination of transport coefficients by transient photoconductivity measurements

Physica B+C ◽  
1985 ◽  
Vol 129 (1-3) ◽  
pp. 524-526 ◽  
Author(s):  
D. Gasquet ◽  
J.P. Nougier ◽  
G. Gineste
Keyword(s):  
Transport Coefficients ◽  
Transient Photoconductivity

Determination of gas transport coefficients in ceramic bodies during thermolysis of organic additives

1996 ◽  
Vol 41 (3) ◽  
pp. 116-128 ◽  
Author(s):  
J. H. Song ◽  
J. R. G. Evans ◽  
M. J. Edirisinghe ◽  
E. H. Twizell
Keyword(s):  
Gas Transport ◽  
Transport Coefficients ◽  
Organic Additives

scholarly journals Thermo-Insulating Moulding Sand for thin Walled Castings

2014 ◽  
Vol 59 (3) ◽  
pp. 1077-1080 ◽  
Author(s):  
M. Cholewa ◽  
T. Szuter
Keyword(s):  
Complex Geometry ◽  
Specific Weight ◽  
Thermal Insulating ◽  
High Insulation ◽  
Thin Walled ◽  
Moulding Sand ◽  
Insulating Properties ◽  
Selection Of ◽  
Matrix Influence

Abstract In paper the selection of the composition and determination of main properties of novel moulding sand was described. The mail goal was to create moulding sand characterized by high thermal insulating properties in relations with low specific weight. This type of moulding sand will find application in thin walled castings with complex geometry, in particular for cores of the skeleton castings. In this work the results of the compressive strength, permeability and friability was presented. It was noted that aluminosilicate microspheres are suitable as moulding sand matrix. Influence of the polyglicol addition on quality and properties of the moulding sand was described. The use of the aluminosilicate microspheres allowed to obtain the moulding sand characterized by high insulation rate, low specific weight and good mechanical properties.

scholarly journals Application of IR spectroscopy to control oxidation inhibitor (ionol) concentration in mineral transformer oils

2020 ◽  
Vol 216 ◽  
pp. 01056
Author(s):  
Marsel Sh. Garifullin ◽  
Marina N. Lyutikova ◽  
Adelya R. Kuchkarova ◽  
Azat R. Bikzinurov ◽  
Yuliya N. Solobodina
Keyword(s):  
Gas Chromatography ◽  
Ir Spectroscopy ◽  
Oxidation Process ◽  
Antioxidant Additive ◽  
Residual Concentration ◽  
Main Method ◽  
Transformer Oils ◽  
Gas Chromatographic Method ◽  
Insulating Properties

Mineral insulating oils used as dielectric and heat dissipating agent in high voltage oil-filled equipment are subject to oxidation. Oxidation results in the appearance of undesirable substances that reduce the electrical insulating properties of liquids. Therefore, to inhibit the oxidation process, an antioxidant additive is introduced into transformer oils. In the overwhelming majority, 2,6-di-tert-butyl-4-methylphenol (ionol) is used as an inhibitor. Residual concentration of ionol is a regularly monitored parameter. In Russia, the main method for determining the concentration of ionol in oil is gas chromatography. However, fourier-transform infrared spectroscopy should be considered as an alternative method for monitoring the ionol content as it has a number of advantages over the gas chromatographic method. The paper compares the results of the determination of ionol in operational transformer oils using gas chromatography and the IR method. We justified that the method of IR spectroscopy has no limitations as applied to oils from power transformers equipped with adsorption purification systems.

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