Comprehensive high-precision high-accuracy equation of state and coexistence properties for classical Lennard-Jones crystals and low-temperature fluid phases

2018 ◽  
Vol 149 (20) ◽  
pp. 204508 ◽  
Author(s):  
Andrew J. Schultz ◽  
David A. Kofke
Keyword(s):  
Equation Of State ◽  
Low Temperature ◽  
High Precision ◽  
High Accuracy ◽  
Lennard Jones ◽  
Fluid Phases

Research on Application of High Precision Angle Encoder in Antarctic Telescope

2013 ◽  
Vol 744 ◽  
pp. 511-516
Author(s):  
Bo Xu ◽  
Bo Zhong Gu ◽  
Fu Jia Du ◽  
Shi Hai Yang
Keyword(s):  
Low Temperature ◽  
High Precision ◽  
Control Measure ◽  
Thermal Control ◽  
High Accuracy ◽  
Cfd Simulations ◽  
Power Requirement ◽  
Temperature Experiment ◽  
Angle Encoder ◽  
Research On Application

The extremely low temperature in Antarctic inland area has taken a new challenge for telescope design and develop, the adaptability of components and parts in telescope for the environment close to space. The application of high accuracy encoder is the only way to improve the accuracy of tracking, however, due to the temperature requirement, there is no application of encoder under such a low temperature ever since. To realize the high accuracy of tracking and steering in telescope, high accuracy encoders must be applied in it. Based on the analysis of influence on encoder caused by temperature, an initial thermal control measure is carried out. Secondly, the thermal control measure is optimized with the method that consists of CFD simulations and experiments. Finally, an effective thermal control measure is applied on the second telescope of the 3 Antarctic Schmidt Telescopes (AST3). By the comparison of normal temperature experiment and low temperature experiment, the encoder can reach a temperature of about 25 degrees when it is under the circumstance of-80 degrees after the thermal control works, and the power consumes by the thermal control is less than 6W. The experiment result indicates that the thermal control measure can fit the requirement of temperature that ranges from-10 degrees to 80 degrees and the lowly consuming power requirement, the encoder can reliably work in low temperature with the thermal control measure works.

Equation of state of a Lennard-Jones 12-6 pairwise additive fluid

1980 ◽  
Vol 45 (4) ◽  
pp. 977-983 ◽  
Author(s):  
Jan Sýs ◽  
Anatol Malijevský
Keyword(s):  
Equation Of State ◽  
Empirical Equation ◽  
The State ◽  
Critical Properties ◽  
Lennard Jones ◽  
State Behaviour ◽  
Compressibility Factors

An empirical equation of state was proposed, which is based on pseudoexperimental data on the state behaviour. The equation can be used at reduced temperatures from the range 0.7-100.0 and reduced densities up to 2. Calculated compressibility factors and critical properties agree well with available literature data.

High Precision Low Temperature Direct Wafer Bonding Technology for Wafer-Level 3D ICs Manufacturing

2016 ◽  
Vol 75 (9) ◽  
pp. 345-353 ◽  
Author(s):  
F. Kurz ◽  
T. Plach ◽  
J. Suss ◽  
T. Wagenleitner ◽  
D. Zinner ◽  
...  
Keyword(s):  
Low Temperature ◽  
High Precision ◽  
Wafer Bonding ◽  
Wafer Level ◽  
3D Ics ◽  
Direct Wafer Bonding ◽  
Bonding Technology

Modification of the Peng–Robinson equation of state for helium in low temperature regions

2015 ◽  
Vol 54 (4) ◽  
pp. 542-551 ◽  
Author(s):  
Shayan Kaviani ◽  
Farzaneh Feyzi ◽  
Bahareh Khosravi
Keyword(s):  
Equation Of State ◽  
Low Temperature ◽  
Robinson Equation
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