Application of the Godunov method and its second-order extension to cascade flow modeling

1983 ◽  
Author(s):  
S. EIDELMAN ◽  
R. SHREEVE ◽  
P. COLELLA
Keyword(s):  
Second Order ◽  
Godunov Method ◽  
Flow Modeling ◽  
Cascade Flow ◽  
Order Extension

Application of the Godunov method and its second-order extension to cascade flow modeling

AIAA Journal ◽  
1984 ◽  
Vol 22 (11) ◽  
pp. 1609-1615 ◽  
Author(s):  
Shmuel Eidelman ◽  
Phillip Colella ◽  
Raymond P. Shreeve
Keyword(s):  
Second Order ◽  
Godunov Method ◽  
Flow Modeling ◽  
Cascade Flow ◽  
Order Extension

scholarly journals Three improvements to the HPSG model theory

2021 ◽  
Author(s):  
Adam Przepiórkowski
Keyword(s):  
Model Theory ◽  
Second Order ◽  
The Third ◽  
Order Extension

The aim of this paper is to propose three improvements to the HPSG model theory. The first is a solution to certain formal problems identified in Richter 2007. These problems are solved if HPSG models are rooted models of utterances and not exhaustive models of languages, as currently assumed. The proposed solution is compatible with all existing views on the nature of objects inhabiting models. The second improvement is a solution to “Höhle’s Problem”, i.e., the problem of massive spurious ambiguities in models of utterances. The third is a formalisation of Yatabe's (2004) analysis of the coordination of unlike categories, one that requires a second-order extension of the language for stating HPSG grammars.

scholarly journals Numerical Simulations of Extragalactic Jets in an Inhomogeneous Environment

1996 ◽  
Vol 175 ◽  
pp. 467-468
Author(s):  
Steve Higgins ◽  
TIM O'BRIEN ◽  
James Dunlop
Keyword(s):  
Numerical Simulations ◽  
Three Dimensional ◽  
Second Order ◽  
Godunov Method ◽  
Radio Sources ◽  
Cartesian Coordinates ◽  
Extragalactic Radio Sources ◽  
Extragalactic Jets ◽  
Hydrodynamic Code

We have simulated the passage of an extragalactic jet through a medium containing an ensemble of cool, dense clouds. The hydrodynamic code uses the second-order Godunov method of Falle (Falle 1991, van Leer 1979) in three-dimensional, cartesian coordinates. We have estimated the synchrotron emissivity and used this to produce synthetic radio maps. The results are reminiscent of structures seen in many extragalactic radio sources.

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