Influence of Temperature on Hydraulic Conductivity in Compacted Bentonite

1997 ◽  
Vol 506 ◽  
Author(s):  
W. J. Cho ◽  
J. O. Lee ◽  
K. S. Chun
Keyword(s):  
Hydraulic Conductivity ◽  
Influence Of Temperature ◽  
Temperature Range ◽  
Compacted Bentonite ◽  
Influence Of Temperature On ◽  
Water Saturated ◽  
Increasing Temperature ◽  
Good Agreement

ABSTRACTThe hydraulic conductivities in water saturated bentonites at different densities were measured within temperature range of 20 to 80 °C. The results show that the hydraulic conductivities increase with increasing temperature. The hydraulic conductivities of bentonites at the temperature of 80 °C increase up to about 3 times as high as those at 20 °C. The measured values are in good agreement with those predicted. The change in viscosity of water with temperature contributes greatly to increase of hydraulic conductivity.

Influence of Temperature on Intratrack Processes and Ps Formation and Behaviour in Liquid Water

2008 ◽  
Vol 607 ◽  
pp. 213-217 ◽  
Author(s):  
Sergey V. Stepanov ◽  
Gilles Duplâtre ◽  
Vsevolod Byakov ◽  
V.S. Subrahmanyam ◽  
Dmitry Zvezhinskiy ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Liquid Water ◽  
Radical Reactions ◽  
Influence Of Temperature ◽  
Positron Annihilation Lifetime ◽  
Temperature Range ◽  
Diffusion Controlled ◽  
Temperature Dependences ◽  
Influence Of Temperature On

Positron annihilation lifetime (PAL) spectra are measured in liquid water in the temperature range 2 – 930C. The spectra are treated by taking into account intratrack reactions and assuming that radical reactions with Ps are diffusion-controlled (the respective temperature dependences obeying the Stokes-Einstein law). Equilibrium Ps bubble parameters are obtained.

The Effect of Sintering Temperature to the Properties of Zinc Oxide

2013 ◽  
Vol 795 ◽  
pp. 419-423 ◽  
Author(s):  
J.H. Lim ◽  
C.K. Yeoh ◽  
Pei Leng Teh ◽  
W.M. Arif ◽  
A. Chik
Keyword(s):  
Thermal Conductivity ◽  
Zinc Oxide ◽  
Thermal Properties ◽  
Solid State ◽  
Sintering Temperature ◽  
Solid State Method ◽  
Influence Of Temperature ◽  
Temperature Range ◽  
Influence Of Temperature On ◽  
State Method

In this paper, different sintering temperature used to study the influence of temperature on the structural and thermal properties of zinc oxide (ZnO). On this research, the sample was prepared by solid-state method for zinc oxide (ZnO) at different sintering temperature which was 700°C, 800°C and 900°C. It was observed that the density of bulk ZnO that sintering at 900°C had the higher value of density 5.03 g/cm3. The microhardness of the bulk ZnO had a higher measurement 397.3 Hv after sintered at 900°C. ZnO that sintering at 900°C had been observed that had thermal conductivity 1.1611W/cm-K in the sintering temperature range 700°C to 900°C.

The influence of temperature on selected strength properties of furniture particleboard

2019 ◽  
Vol 108 ◽  
pp. 128-134
Author(s):  
PIOTR BORYSIUK ◽  
ANNA TETELEWSKA ◽  
AURIGA RADOSŁAW ◽  
IZABELLA JENCZYK-TOŁŁOCZKO
Keyword(s):  
Strength Properties ◽  
Large Decrease ◽  
Influence Of Temperature ◽  
Temperature Range ◽  
Influence Of Temperature On ◽  
Negative Effect

The influence of temperature on selected strength properties of furniture particleboard. As a part of the study, the influence of temperature on selected properties of furniture particleboard was tested. P2 type industrial particleboards in three finishing options: raw boards (1), boards covered with melamine film in white (2) and black (3) (10 samples per variant) have been subjected to temperatures from -20oC to +120oC, at 10oC intervals. The Time of exposure for individual temperatures was 7 days. MOR, MOE and IB were determined for tested boards. It has been shown that temperatures above 50oC have a negative effect on strength properties of boards. A large decrease in all tested parameters was observed in the temperature range from +60oC to +120oC. It was also noted that finishing boards with melamine film did not improve their durability.

Effect of Temperature on Crater Formation and Ejecta Composition in Aluminum Alloy Targets

2012 ◽  
Vol 706-709 ◽  
pp. 768-773
Author(s):  
Masahiro Nishida ◽  
Koichi Hayashi ◽  
Junichi Nakagawa ◽  
Yoshitaka Ito
Keyword(s):  
Aluminum Alloy ◽  
High Temperature ◽  
Low Temperature ◽  
Room Temperature ◽  
Effect Of Temperature ◽  
Crater Formation ◽  
Influence Of Temperature ◽  
Gas Gun ◽  
Influence Of Temperature On ◽  
Increasing Temperature

The influence of temperature on crater formation and ejecta composition in thick aluminum alloy targets were investigated for impact velocities ranging from approximately 1.5 to 3.5 km/s using a two-stage light-gas gun. The diameter and depth of the crater increased with increasing temperature. The ejecta size at low temperature was slightly smaller than that at high temperature and room temperature. Temperature did not affect the size ratio of ejecta. The scatter diameter of the ejecta at high temperature was slightly smaller than those at low and room temperatures.

Temperature Influence on the Viscoelastic Electromechanical Deformation of Dielectric Elastomer

2014 ◽  
Vol 1052 ◽  
pp. 137-142
Author(s):  
Jun Jie Sheng ◽  
Yu Qing Zhang ◽  
Shu Yong Li ◽  
Hua Ling Chen
Keyword(s):  
Dielectric Elastomer ◽  
Electric Load ◽  
Temperature Influence ◽  
Temperature Dependent ◽  
Influence Of Temperature ◽  
Dielectric Elastomer Actuators ◽  
Influence Of Temperature On ◽  
Electromechanical Instability ◽  
Increasing Temperature ◽  
Electromechanical Deformation

Temperature can significantly affect the performance of a viscoelastic dielectric elastomer (DE). In the current study, we use a thermodynamic model to characterize the influence of temperature on the viscoelastic electromechanical response undergoing a constant electric load by taking into account the temperature dependent elastic modus and dielectric constant. Due to the significant viscoelasticity in the dielectric elastomer, DE membrane creeps in time and the inelastic stretch of DE is smaller than that of the total stretch. The results show that the total stretch of the viscoelastic electromechanical deformation increases with the increasing temperature until suffering electromechanical instability at a high temperature; the actuation performance is dominated by the moduli of the elastomer. This may be used to guide the design of dielectric elastomer actuators undergoing temperature variation.

Influence of Temperature on the Tensile Strength of Carbon Filled Vulcanizates

1971 ◽  
Vol 44 (3) ◽  
pp. 728-743 ◽  
Author(s):  
R. W. Sambrook
Keyword(s):  
Tensile Strength ◽  
Carbon Black ◽  
Molecular Mobility ◽  
Substantial Reduction ◽  
Morphological Characteristics ◽  
Influence Of Temperature ◽  
Mechanical Hysteresis ◽  
Influence Of Temperature On ◽  
Increasing Temperature ◽  
High Structure

Abstract Despite undergoing a substantial reduction with increasing temperature the presence of carbon black added to the strength of both natural and styrenebutadiene rubber at temperatures up to 185° C. The magnitude of reinforcement was primarily dependent upon filler surface area although at the higher temperatures when this dependence is not so marked both high structure and particle activity appear advantageous. No theory of carbon black reinforcement can reasonably ignore the morphological characteristics of the material whose action it is attempting to explain. The concept of within aggregate voids, and occluded rubber envisaged by Medalia and used in this paper to describe the effect of fillers on rubber modulus, provides an interesting molecular meaning to the effects that have hitherto been explained on the basis of “shell” theories. Occluded rubber might reasonably be viewed as a type of shell since it undoubtedly represents a polymer zone in which molecular mobility is restricted. Furthermore the view of rubber being pulled from the interstices of an aggregate, manifestly a stress softening action, provides a source of plastic flow and mechanical hysteresis in the region of the aggregate—an apparent prerequisite for reinforcement.

Influence of temperature on phosphorus ion behavior during silicon bombardment

1968 ◽  
Vol 46 (6) ◽  
pp. 705-712 ◽  
Author(s):  
Philippe M. Glotin
Keyword(s):  
Activation Energies ◽  
Influence Of Temperature ◽  
Temperature Range ◽  
Annealing Temperatures ◽  
Influence Of Temperature On ◽  
Ion Ranges ◽  
Large Clusters

Silicon samples have been bombarded with 20-keV phosphorus ions along the easy channeling direction. Annealing temperatures and activation energies of the defects created during irradiation have been determined using a Corbino structure. The nature of the defects varies as a function of depth. Large clusters exist in the superficial layers when mainly E and A centers have been identified in the channeled part of the profile. The influence of these defects on ion ranges is shown. The most important consequence of this study is to indicate a useful temperature range, between 550 and 650 °C, for phosphorus implantation into silicon.

FEEDING AND EGG PRODUCTION OF TWO SPECIES OF COCCINELLIDS IN THE LABORATORY

1981 ◽  
Vol 113 (11) ◽  
pp. 999-1005 ◽  
Author(s):  
P. M. Ives
Keyword(s):  
Body Weight ◽  
Food Consumption ◽  
Egg Production ◽  
Feeding Rate ◽  
Influence Of Temperature ◽  
Maintenance Requirement ◽  
Pea Aphids ◽  
Influence Of Temperature On ◽  
Increasing Temperature ◽  
The Relationship

AbstractThe relationship between feeding rate and egg production of Coccinella trifasciata Mulsant and C. californica Mannerheim feeding on pea aphids, was investigated in the laboratory at 15.0°, 18.5°, 21.5°, and 25.5°C. Both species increase their feeding rate with increasing temperature above 13.6°C, with C. californica, the larger species, increasing its food consumption faster. C. californica also has the higher maintenance requirement but when food consumption is expressed relative to the beetles’ body weight, there is no difference between the species in either attribute. Coccinella californica converts excess food to eggs more efficiently than C. trifasciata.No significant influence of temperature on either the conversion rate or the maintenance requirement could be detected. The adverse effects of a very low feeding rate, whether due to restricted food supply or low temperature, influenced the beetles’ response to subsequent treatments.

scholarly journals Influence of Temperature on the Rheological Behavior of Orange Honey

2021 ◽  
Vol 37 (2) ◽  
pp. 440-443
Author(s):  
Ioana Stanciu
Keyword(s):  
Newtonian Fluid ◽  
Rheological Behavior ◽  
Absolute Temperature ◽  
Influence Of Temperature ◽  
Different Temperatures ◽  
Influence Of Temperature On ◽  
The Absolute ◽  
Increasing Temperature

The study was performed to determine the effect of the logarithm of the viscosity on the inverse of the absolute temperature for orange honey. Based on the studied rheograms, it turned out to be a non-Newtonian fluid. The shear range used did not significantly affect the absolute viscosities of orange honey at different temperatures. The absolute viscosities of orange honey have decreased with increasing temperature and can be equipped with an Arrhenius type relationship. The rheological behavior is influenced by both humidity and its composition.

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