Effect of Temperature on the Electrical Conductivity of Sodium Bis(2-ethylhexyl)sulfosuccinate + 2,2,4-Trimethylpentane + Water Microemulsions. Influence of Alkylamines

1999 ◽  
Vol 44 (6) ◽  
pp. 1286-1290 ◽  
Author(s):  
E. Álvarez ◽  
L. García-Río ◽  
J. C. Mejuto ◽  
J. M. Navaza ◽  
J. Pérez-Juste ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Effect Of Temperature

Effect of temperature and moisture on electrical conductivity in polyaniline/polyurethane (PANI/PU) blends

2006 ◽  
Vol 156 (18-20) ◽  
pp. 1187-1193 ◽  
Author(s):  
Hitoshi Yoshikawa ◽  
Tetsuo Hino ◽  
Noriyuki Kuramoto
Keyword(s):  
Electrical Conductivity ◽  
Effect Of Temperature

Effect of temperature and time on some physical characteristics of Paneer whey

2017 ◽  
Vol 36 (02) ◽  
Author(s):  
Pranita Sahu ◽  
A. K. Agrawal ◽  
Geetesh Sinha ◽  
C. Sahu ◽  
Ruchi Sahu
Keyword(s):  
Electrical Conductivity ◽  
Specific Weight ◽  
Physical Characteristics ◽  
Effect Of Temperature ◽  
Appreciable Effect ◽  
Paneer Whey

The present investigation was to determine the various physical characteristics of paneer whey with respect to density, specific weight and electrical conductivity. These physical characteristics were determined considering three levels of temperatures 20, 25 and 30oC at intervals of 1, 2 and 3 h. The highest values for density and specific weight of whey were observed 1015.43 kg/m3 and 9.961 kN/m3 at 20oC respectively and with respect to time it was observed 1013.5 kg/m3 and 9.942 kN/m3 at 3 h respectively. The highest electrical conductivity of whey was 5.10 mS/cm at 30oC and with respect to time it was observed 4.93 mS/cm at 3 h. There is not much appreciable effect on variation on physical characteristics with respect to time, whereas the temperature had shown significant effect on physical characteristics. The data generated in the present investigation can be utilized as guidelines for designing of whey based processing systems.

The Effect of Temperature Dependent Electrical Conductivity on the MHD Natural Convection of Al2O3–Water Nanofluid in a Rectangular Enclosure

2014 ◽  
Author(s):  
Ali Mohammad Asadian ◽  
Omid Abouali ◽  
Mahmoud Yaghoubi ◽  
Goodarz Ahmadi
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Electrical Conductivity ◽  
Natural Convection ◽  
Effect Of Temperature ◽  
Fluid Viscosity ◽  
Heat Transfer Characteristics ◽  
Volume Fractions ◽  
Transfer Characteristics ◽  
Flow And Heat Transfer

The present paper is concerned with the study of flow and heat transfer characteristics in the steady state free convective flow of Al2O3-waternanofluids in a square enclosure in the presence of magnetic field. Attention is given to the temperature variation of the electrical conductivity and its effect on the electromagnetic force induced by the motion of the nanofluid. A new experimental correlation recently presented in the literature was used for this aim. In all the earlier studies in this area the electrical conductivity variation of nanofluid with temperature was neglected. The fluid viscosity and thermal conductivity are assumed to vary as a function of temperature and this variation is modeled using the available experimental correlations. The governing differential equations are solved numerically using finite element method. The features of fluid flow and heat transfer characteristics are analyzed for various strengths of the magnetic field and different nanoparticle volume fractions. The results show that when the inclusion of the variation of the electrical conductivity with temperature in the numerical model noticeably affects the natural convection heat transfer in the studied rectangular cavity. The variations of Nusselt number for natural convection of Al2O3-water nanofluid with nanoparticle volume fractions are presented at various Rayleigh and Hartmann numbers.

Effect of Temperature on the Microstructure and Electrical Conductivity of Microcrystalline Si Films

2017 ◽  
Vol 895 ◽  
pp. 28-32 ◽  
Author(s):  
Hua Cheng ◽  
Di Wang ◽  
Feng Li Li
Keyword(s):  
Electrical Conductivity ◽  
Grain Size ◽  
Substrate Temperature ◽  
Cyclotron Resonance ◽  
Electron Cyclotron Resonance ◽  
Gaseous Mixture ◽  
Chemical Vapor ◽  
Effect Of Temperature ◽  
Si Films ◽  
Resonance Plasma

Micro-Si films were deposited using Ar diluted SiH4 gaseous mixture by electron cyclotron resonance plasma-enhanced chemical vapor deposition (ECR-PECVD). The effects of the substrate temperature on microstructure and electrical conductivity of micro-Si film were investigated. The results show that, with the increasing of substrate temperature, crystallinity and grain size increased monotonously, of which a competing balance would determine the electrical conductivity of micro-Si films. Based on these results, relatively small grain size and appropriate crystallinity would be beneficial to improve the electrical properties of micro-Si films.

scholarly journals Evaluation of Methods to Correct the Effect of Temperature on Electrical Conductivity of Mortar

2018 ◽  
Vol 2018 ◽  
pp. 1-9
Author(s):  
Milena Rangelov ◽  
Somayeh Nassiri
Keyword(s):  
Electrical Conductivity ◽  
Cementitious Materials ◽  
Temperature Correction ◽  
Supplementary Cementitious Materials ◽  
Embedded Sensors ◽  
Degree Of Saturation ◽  
Effect Of Temperature ◽  
Temperature Range ◽  
Durability Assessment ◽  
Higher Temperature

Nondestructive methods to obtain the electrical conductivity (σ) or resistivity (ρ) of concrete are gaining popularity for durability evaluation. However, these methods are susceptible to the effects of curing and conditioning, primarily temperature and degree of saturation. Before σ of concrete at varied temperatures can be used for durability assessment, appropriate corrections must be made to account for the effect of temperature (T). In this study, two existing and one new temperature correction methods were evaluated for 12 mortar mixtures varying in water-to-cementitious material ratio (w/cm) and the content and types of supplementary cementitious materials (SCM). Mortar specimens instrumented with embedded sensors were cured in sealed conditions for 11–13 months. After this period, the sealed specimens were subjected to stepwise temperature change in 5–50°C range while σ was recorded using the embedded sensors. Linear, bilinear, and Arrhenius temperature correction (LTC, BLTC, and ATC, respectively) were fitted to the obtained σ-T datasets and were evaluated for fitness. LTC provided an acceptable fit to the σ-T data (R2 > 0.81) but was found the most suitable in 5–30°C temperature range. BLTC was defined as a combination of two distinct LTC below and above the reference temperature at 23°C and had a better fit to the data (R2 > 0.96). Lastly, ATC showed the best fit among the tested methods (R2 > 0.98) and was found applicable for the full tested temperature range. Comparison of correction coefficients among the mixtures indicated that increase in w/cm results in less sensitivity of σ to temperature. Mixtures with SCM generally exhibit higher temperature sensitivity compared to the corresponding plain mixture. Since the variations in correction coefficients were not substantial (less 18% variation among 10 of 12 mixtures), a single value of activation energy of conduction (Ec) at 32 kJ/mol was identified as the general recommendation for all the tested mixtures.

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