Enskog Theory and the Relationship between the Transport Coefficients of Fluids

1971 ◽  
Vol 55 (8) ◽  
pp. 3706-3707 ◽  
Author(s):  
H. L. Frisch ◽  
E. McLaughlin
Keyword(s):  
Transport Coefficients ◽  
Enskog Theory ◽  
The Relationship

Stability of Computational Algorithms Used in Molecular Dynamics Simulations

1995 ◽  
Vol 117 (3) ◽  
pp. 531-534 ◽  
Author(s):  
Akira Satoh
Keyword(s):  
Transport Coefficients ◽  
Three Dimensional ◽  
Divergence Time ◽  
Linear Functions ◽  
Time Interval ◽  
Thermodynamic Quantities ◽  
Number Density ◽  
Time Intervals ◽  
Dynamics Simulations ◽  
The Relationship

The present study focuses on a three-dimensional Lennard-Jones system in a thermodynamic equilibrium in order to discuss divergence processes, the relationship between time intervals and divergence times, and the influence of time intervals on thermodynamic quantities and transport coefficients under various number density and temperature. It is found that the velocities of molecules in a system gradually increase with time until the system suddenly diverges exponentially. The time interval-divergence time relationship can be expressed in approximate terms as linear functions if the data are plotted on logarithmic scales, and the system diverges more easily as temperature or number density increases. Thermodynamic quantities show the influence of large time intervals more clearly than do transport coefficients.

Diffusion and Solubility of Common Microelectronic Airborne Molecular Contaminants into PEI Thin Polymer Membranes and its Related Contamination Control Applications

2020 ◽  
Vol 400 ◽  
pp. 109-116
Author(s):  
P. González-Aguirre ◽  
Minh Phuong Tran ◽  
Fernando Herrán ◽  
Sung In Moon ◽  
Jorgen Lundgren ◽  
...  
Keyword(s):  
Transport Coefficients ◽  
Kinetic Method ◽  
Cross Contamination ◽  
Polymer Thin Film ◽  
Contamination Control ◽  
Thin Polymer ◽  
Crucial Information ◽  
Sorption Parameters ◽  
Molecular Contaminants ◽  
The Relationship

Sorption and outgassing mechanisms of corrosive gases in relation with wafers lost yield due to polymer container Front Opening Unified Pod (FOUP), is crucial information to understand the cross contamination between FOUP and wafers. This occurs when FOUPs (made in polymers) outgas contaminants into the wafer surrounding minienvironment. Gas sorption is governed by surface adsorption, followed by diffusion and solubility and then, permeability appears as a key parameter to understanding these cross contamination phenomena. In this work, we present the transport coefficients obtained for gaseous HF and HCl at cleanroom conditions (Patm, 21 ± 2°C & 40% RH) at two different HX concentrations using the sorption kinetic method, based on Fick’s law, for thin films (≈50μm) of PEI. Finally, we establish the relationship between the sorption parameters of a polymer thin film and the potential contamination transfer from a FOUP whose main polymer material is similar.

scholarly journals The Enskog theory for transport coefficients of simple fluids with continuous potentials

2001 ◽  
Vol 114 (14) ◽  
pp. 6276-6285 ◽  
Author(s):  
Kunimasa Miyazaki ◽  
Goundla Srinivas ◽  
Biman Bagchi
Keyword(s):  
Transport Coefficients ◽  
Enskog Theory ◽  
Simple Fluids

Transport Coefficients of Expanded Fluid Metals

1977 ◽  
Vol 32 (10) ◽  
pp. 1146-1151 ◽  
Author(s):  
H. von Tippelskirch
Keyword(s):  
Diffusion Coefficients ◽  
Liquid Metals ◽  
Transport Coefficients ◽  
The Self ◽  
Enskog Theory ◽  
Interaction Forces ◽  
Self Diffusion ◽  
Coexistence Line ◽  
Modified Enskog Theory

The viscosities and the self-diffusion coefficients of expanded fluid mercury and caesium have been calculated as a function of pressure and temperature up to their critical points with the aid of a modified Enskog theory. The results are compared with the transport coefficients of other liquid metals and of non-polar and polar fluids applying the principle of corresponding states. The thermal conductivities of fluid metals along the full coexistence line are also discussed. A classification of the transport phenomena in fluids with various types of interaction forces - including expanded fluid metals - is given

Interstellar gas in the central region of the Galaxy

1967 ◽  
Vol 31 ◽  
pp. 239-251 ◽  
Author(s):  
F. J. Kerr
Keyword(s):  
Central Region ◽  
Galactic Plane ◽  
Neutral Hydrogen ◽  
Continuum Emission ◽  
Galactic Centre ◽  
Interstellar Gas ◽  
Hydrogen Recombination ◽  
The Galaxy ◽  
Centre Region ◽  
The Relationship

A review is given of information on the galactic-centre region obtained from recent observations of the 21-cm line from neutral hydrogen, the 18-cm group of OH lines, a hydrogen recombination line at 6 cm wavelength, and the continuum emission from ionized hydrogen.Both inward and outward motions are important in this region, in addition to rotation. Several types of observation indicate the presence of material in features inclined to the galactic plane. The relationship between the H and OH concentrations is not yet clear, but a rough picture of the central region can be proposed.

The relationship of the scleractinian corals to the rugose corals

Paleobiology ◽  
1980 ◽  
Vol 6 (02) ◽  
pp. 146-160 ◽  
Author(s):  
William A. Oliver
Keyword(s):  
Critical Points ◽  
Scleractinian Corals ◽  
Convincing Evidence ◽  
Early Triassic ◽  
Rugose Corals ◽  
History Of ◽  
The Subject ◽  
Relationship Of ◽  
The Relationship ◽  
Biologic Factors

The Mesozoic-Cenozoic coral Order Scleractinia has been suggested to have originated or evolved (1) by direct descent from the Paleozoic Order Rugosa or (2) by the development of a skeleton in members of one of the anemone groups that probably have existed throughout Phanerozoic time. In spite of much work on the subject, advocates of the direct descent hypothesis have failed to find convincing evidence of this relationship. Critical points are:(1) Rugosan septal insertion is serial; Scleractinian insertion is cyclic; no intermediate stages have been demonstrated. Apparent intermediates are Scleractinia having bilateral cyclic insertion or teratological Rugosa.(2) There is convincing evidence that the skeletons of many Rugosa were calcitic and none are known to be or to have been aragonitic. In contrast, the skeletons of all living Scleractinia are aragonitic and there is evidence that fossil Scleractinia were aragonitic also. The mineralogic difference is almost certainly due to intrinsic biologic factors.(3) No early Triassic corals of either group are known. This fact is not compelling (by itself) but is important in connection with points 1 and 2, because, given direct descent, both changes took place during this only stage in the history of the two groups in which there are no known corals.

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