Two-dimensional nonequilibrium fluid models for streamers

1993 ◽  
Vol 21 (6) ◽  
pp. 684-695 ◽  
Author(s):  
Jing-Ming Guo ◽  
Chwan-Hwa John Wu
Keyword(s):  
Fluid Models ◽  
Two Dimensional

Comparisons of one‐ and two‐dimensional three‐moment fluid models for rf glow discharges

1993 ◽  
Vol 74 (2) ◽  
pp. 839-847 ◽  
Author(s):  
Fongray Frank Young ◽  
Chwan‐Hwa ‘‘John’’ Wu
Keyword(s):  
Fluid Models ◽  
Two Dimensional ◽  
Glow Discharges

Turbomachinery Thermal Analysis Using Coupled Two- and Three Dimensional Models and Reduced Order Fluid Models

2011 ◽  
Author(s):  
Jesus Contreras ◽  
Roque Corral ◽  
Guillermo Pastor
Keyword(s):  
Three Dimensional ◽  
Heat Fluxes ◽  
Fluid Models ◽  
Two Dimensional ◽  
Reduced Order ◽  
Realistic Case ◽  
Different Types ◽  
Three Dimensional Models ◽  
Edge Based ◽  
Fully Coupled

A methodology to couple two- and three dimensional thermal models is described. The method uses reduced order fluid models as a mechanism to transfer heat fluxes and average temperatures at the interface. In particular the concept of a duct-void is introduced to ease the coupling of different types of models. A new edge-based thermal solver, which is used in this process, is briefly described. A realistic case, corresponding to a two-stage turbine, is used to illustrate the usefulness of the method. It is concluded that the temperature difference between a fully coupled a approach and a simpler unidirectional method (in which a two-dimensional global model is first computed and, then, the temperatures at the interface are transferred to three-dimensional sub-components) may be large enough to affect engineering decisions.

Spectrophotometric measurements of objective-prism spectra

1966 ◽  
Vol 24 ◽  
pp. 118-119
Author(s):  
Th. Schmidt-Kaler
Keyword(s):  
Progress Report ◽  
Two Dimensional ◽  
Objective Prism ◽  
Made In

I should like to give you a very condensed progress report on some spectrophotometric measurements of objective-prism spectra made in collaboration with H. Leicher at Bonn. The procedure used is almost completely automatic. The measurements are made with the help of a semi-automatic fully digitized registering microphotometer constructed by Hög-Hamburg. The reductions are carried out with the aid of a number of interconnected programmes written for the computer IBM 7090, beginning with the output of the photometer in the form of punched cards and ending with the printing-out of the final two-dimensional classifications.

Introductory paper

1966 ◽  
Vol 24 ◽  
pp. 3-5
Author(s):  
W. W. Morgan
Keyword(s):  
Line Intensity ◽  
Classification Scheme ◽  
Two Dimensional ◽  
Spectral Classification ◽  
Dimensional Array ◽  
Rr Lyrae ◽  
Metallic Line ◽  
Introductory Paper ◽  
Parameter Varying ◽  
Definition Of

1. The definition of “normal” stars in spectral classification changes with time; at the time of the publication of theYerkes Spectral Atlasthe term “normal” was applied to stars whose spectra could be fitted smoothly into a two-dimensional array. Thus, at that time, weak-lined spectra (RR Lyrae and HD 140283) would have been considered peculiar. At the present time we would tend to classify such spectra as “normal”—in a more complicated classification scheme which would have a parameter varying with metallic-line intensity within a specific spectral subdivision.

A one-dimensional self-gravitating stellar gas

1966 ◽  
Vol 25 ◽  
pp. 46-48 ◽  
Author(s):  
M. Lecar
Keyword(s):  
Gravitational Field ◽  
Phase Space ◽  
Motion Picture ◽  
Space Distribution ◽  
Two Dimensional ◽  
One Dimensional ◽  
Phase Space Distribution ◽  
Dimensional Phase Space ◽  
The Mean

“Dynamical mixing”, i.e. relaxation of a stellar phase space distribution through interaction with the mean gravitational field, is numerically investigated for a one-dimensional self-gravitating stellar gas. Qualitative results are presented in the form of a motion picture of the flow of phase points (representing homogeneous slabs of stars) in two-dimensional phase space.

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