scholarly journals Study of the Thermal Diffusion Behavior of Alkane/Benzene Mixtures by Thermal Diffusion Forced Rayleigh Scattering Experiments and Lattice Model Calculations

2006 ◽  
Vol 110 (51) ◽  
pp. 26215-26224 ◽  
Author(s):  
Pavel Polyakov ◽  
Jutta Luettmer-Strathmann ◽  
Simone Wiegand
Keyword(s):  
Thermal Diffusion ◽  
Lattice Model ◽  
Rayleigh Scattering ◽  
Model Calculations ◽  
Diffusion Behavior

scholarly journals Thermal Diffusion Forced Rayleigh Scattering Setup Optimized for Aqueous Mixtures

2007 ◽  
Vol 111 (51) ◽  
pp. 14169-14174 ◽  
Author(s):  
Simone Wiegand ◽  
Hui Ning ◽  
Hartmut Kriegs
Keyword(s):  
Thermal Diffusion ◽  
Rayleigh Scattering ◽  
Aqueous Mixtures

Non-Equilibrium Molecular Dynamics Study of the Influence of Branching on the Soret Coefficient of Binary Mixtures of Heptane Isomers

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Xiaoyu Chen ◽  
Ruquan Liang ◽  
Lichun Wu ◽  
Gan Cui
Keyword(s):  
Molecular Dynamics ◽  
Thermal Diffusion ◽  
Soret Coefficient ◽  
Isomer Mixture ◽  
Acentric Factor ◽  
Diffusion Behavior ◽  
The Difference ◽  
Non Equilibrium Molecular Dynamics ◽  
Molecular Branching ◽  
Non Equilibrium

Abstract Equimolar mixtures composed of isomers were firstly used to investigate the molecular branching effect on thermal diffusion behavior, which was not disturbed by factors of molecular mass and composition in this work. Eight heptane isomers, including n-heptane, 2-methylhexane, 3-methylhexane, 2,2-dimethylpentane, 2,3-dimethylpentane, 2,4-dimethylpentane, 3,3-dimethylpentane and 3-ethylpentane, were chosen as the researched mixtures. A non-equilibrium molecular dynamics (NEMD) simulation with enhanced heat exchange (eHEX) algorithm was applied to calculate the Soret coefficient at T = 303.15 T=303.15  K and P = 1.0 atm P=1.0\hspace{0.1667em}\text{atm} . An empirical correlation based on an acentric factor was proposed and its calculation coincides with the simulated results, which showed the validity of the NEMD simulation. It is demonstrated that the isomer with higher acentric factor has a stronger thermophilic property and tends to migrate to the hot region in the heptane isomer mixture, and the extent of thermal diffusion is proportional to the difference between the acentric factors of the isomers.

Phase behavior and local structure of a binary mixture in pores: Mean-field lattice model calculations for analyzing neutron scattering data

2005 ◽  
Vol 122 (12) ◽  
pp. 124510 ◽  
Author(s):  
Dirk Woywod ◽  
Sebastian Schemmel ◽  
Gernot Rother ◽  
Gerhard H. Findenegg ◽  
Martin Schoen
Keyword(s):  
Binary Mixture ◽  
Neutron Scattering ◽  
Phase Behavior ◽  
Lattice Model ◽  
Local Structure ◽  
Mean Field ◽  
Scattering Data ◽  
Model Calculations

Preparation of Y-Cu-O/Ba-Cu-O Multilayered Thin Films and Thermal Diffusion Behavior of the Interface

1991 ◽  
Vol 30 (Part 1, No. 8) ◽  
pp. 1676-1678
Author(s):  
Toshiaki Asakawa ◽  
Tadashi Shiraishi ◽  
Shinya Nakanishi ◽  
Tohru Hirayama ◽  
Hironobu Sakata ◽  
...  
Keyword(s):  
Thin Films ◽  
Thermal Diffusion ◽  
Diffusion Behavior ◽  
Multilayered Thin Films

scholarly journals Thermal Diffusion Behavior of Nonionic Surfactants in Water

2006 ◽  
Vol 110 (22) ◽  
pp. 10746-10756 ◽  
Author(s):  
Hui Ning ◽  
Rio Kita ◽  
Hartmut Kriegs ◽  
Jutta Luettmer-Strathmann ◽  
Simone Wiegand
Keyword(s):  
Thermal Diffusion ◽  
Nonionic Surfactants ◽  
Diffusion Behavior

Lattice model calculations for dx2−y2-wave Josephson junctions

2001 ◽  
Vol 352 (1-4) ◽  
pp. 165-168 ◽  
Author(s):  
Hiroki Tsuchiura ◽  
Yukio Tanaka ◽  
Masao Ogata ◽  
Satoshi Kashiwaya
Keyword(s):  
Lattice Model ◽  
Josephson Junctions ◽  
Model Calculations

Viking UV cameras: Calibration using model calculations and long-wavelength light leakage

1991 ◽  
Vol 69 (8-9) ◽  
pp. 1154-1162 ◽  
Author(s):  
E. Griffioen ◽  
J. C. McConnell ◽  
J. S. Murphree ◽  
G. G. Shepherd ◽  
L L. Cogger
Keyword(s):  
Radiative Transfer ◽  
Rayleigh Scattering ◽  
Transfer Functions ◽  
Model Calculations ◽  
Long Wavelength ◽  
Response Characteristics ◽  
Comparable Accuracy ◽  
Scattering Contribution ◽  
Emission Strength ◽  
Wavelength Light

In this paper we present the results of a comparison of Viking UV images of the dayglow with model calculations of the dayglow in order to assess the uncertainties in the calibration of the cameras. The procedure that was adopted was to calculate the dayglow emissions using proven photoelectron and radiative transfer codes, and convolve these results with the prelaunch camera transfer functions to estimate the emission strength for the two cameras (1304 Å (1 Å = 10−10 m) and Lyman–Birge–Hopfield (LBH)). We found quite good agreement between the model and measured intensities for the 1304 Å camera. However, the results for the LBH camera suggest that there is substantial leakage of far UV (FUV) light at 2000 Å and "white" light around 3400 Å: only about 20–30% of the emission comes from the LBH dayglow. To evaluate the contamination from the longer wavelengths, we assumed that it was due to Rayleigh scattering off air molecules and reflection off surfaces. A multilayer multiple-scattering radiative transfer code allowing for Rayleigh scattering and absorption by O2 and O3 was used. The model intensities were then convolved with "known" and extrapolated camera filter response characteristics in the region from 1800 to 7500 Å to obtain model camera signal values due to long-wavelength light leakage. A preliminary estimate of the scattering contribution to the observed intensities using the first-order guess of the camera response function (CRF) beyond 2000 Å resulted in a substantial overestimation of the LBH camera intensities. To obtain a better estimate of the CRF we used an LBH image where clouds were known to be present. This allowed us to distinguish between the 2000 and 3400 Å contributions in order to obtain a modified CRF that reproduces the data for the LBH camera. The fact that both the 1304 Å dayglow camera intensities and the model results are comparable and the LBH intensities may be modelled allowing for Rayleigh scattering suggest that the calibration of the cameras in the FUV are defined to better than about 30% and so should reproduce nighttime auroral intensities at 1304 Å and for the LBH system with comparable accuracy.

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