Numerical simulation of three-dimensional collisionless disk of NGC 1566 galaxy

2021 ◽  
pp. 131-136
Author(s):  
R. V. ZOLOTAREV ◽  
V. I. KORCHAGIN ◽  
B. B. JMAILOV ◽  
R. R. DIBIROV
Keyword(s):  
Numerical Simulation ◽  
Observational Data ◽  
Three Dimensional ◽  
Global Mode ◽  
The Galaxy ◽  
Armed Spiral

This paper reports the results of the numerical N-body simulations of the dynamics of collisionless disk of the galaxy NGC 1566. Using recent observational data for this galaxy, we construct equilibrium three-dimensional collisionless model of its disk and study the disk dynamics using direct N-body simulations. Results of our simulations show that the most unstable global mode in the collisionless disk is the two-armed spiral.

scholarly journals Gaia: A Stereoscopic Census of Our Galaxy

2009 ◽  
Vol 5 (H15) ◽  
pp. 816-816
Author(s):  
T. Prusti
Keyword(s):  
Physical Properties ◽  
Elemental Composition ◽  
Observational Data ◽  
Evolutionary History ◽  
Three Dimensional ◽  
Subsequent Evolution ◽  
The Galaxy ◽  
History Of ◽  
Space Astrometry ◽  
Modern Astronomy

AbstractGaia is a space astrometry mission, a broad survey project following the measurement and operational principles of Hipparcos. It will help solving one of the most difficult yet deeply fundamental challenges in modern astronomy: to create an extraordinarily precise three-dimensional map of about one billion stars throughout our Galaxy and beyond. In the process, it will map their three-dimensional motions, which encode the origin and subsequent evolution of the Galaxy. Through comprehensive photometric and spectroscopic classification, it will provide the detailed physical properties of each star observed: characterising their luminosity, temperature, gravity, and elemental composition. This massive stellar census will provide the basic observational data to tackle an enormous range of important problems related to the origin, structure, and evolutionary history of our Galaxy.

Three-dimensional transverse instabilities in detached boundary layers

2007 ◽  
Vol 571 ◽  
pp. 221-233 ◽  
Author(s):  
FRANÇOIS GALLAIRE ◽  
MATTHIEU MARQUILLIE ◽  
UWE EHRENSTEIN
Keyword(s):  
Numerical Simulation ◽  
Stokes Equations ◽  
Three Dimensional ◽  
Linear Analysis ◽  
Navier Stokes ◽  
Physical Origin ◽  
Viscous Effects ◽  
Global Mode ◽  
Navier Stokes Equations ◽  
Recirculation Bubble

A direct numerical simulation of the incompressible Navier–Stokes equations of the flow over a bump shows a stationary longitudinal instability at a Reynolds number of Re = 400. A three-dimensional global mode linear analysis is used to interpret these results and shows that the most unstable eigenmode is steady and localized in the recirculation bubble, with spanwise wavelength of approximately ten bump heights. An inviscid geometrical optics analysis along closed streamlines is then proposed and modified to account for viscous effects. This motivates a final discussion regarding the physical origin of the observed instability.

scholarly journals Blowing and drifting snow in Alpine terrain: numerical simulation and related field measurements

1998 ◽  
Vol 26 ◽  
pp. 174-178 ◽  
Author(s):  
Peter Gauer
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Three Dimensional ◽  
Field Measurements ◽  
Blowing Snow ◽  
Related Field ◽  
Drifting Snow ◽  
Physically Based ◽  
Snow Transport

A physically based numerical model of drifting and blowing snow in three-dimensional terrain is developed. The model includes snow transport by saltation and suspension. As an example, a numerical simulation for an Alpine ridge is presented and compared with field measurements.

Three-dimensional numerical simulation of wave-induced scour around a pile on a sloping beach

2021 ◽  
Vol 233 ◽  
pp. 109174
Author(s):  
Jinzhao Li ◽  
David R. Fuhrman ◽  
Xuan Kong ◽  
Mingxiao Xie ◽  
Yilin Yang
Keyword(s):  
Numerical Simulation ◽  
Three Dimensional ◽  
Sloping Beach ◽  
Wave Induced
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