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Simulation of Compressible Flow in Time Dependent Domains
Prokopová, Jaroslava
This work is concerned with the numerical solution of compressible flow using finite element method in ALE (Arbitrary Lagrangian-Eulerian) formulation of the Navier-Stokes equations, their discretization in space by the discontinuous Galerkin method and introducing a semi-implicit linearized time stepping for the numerical solution of the complete problem. Some computational results are presented for flow in a channel with a moving wall.
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Shell-Like Structures in the ISM: Observation Versus Simulations
Sidorin, Vojtěch ; Palouš, Jan
The interstellar medium in galaxies is a turbulent environment with a plethora of holes, bubbles and shells. All these shell-like structures are thought to be closely related to the formation, evolution and death of stars. In most cases, they are likely created by the winds of OB stars and supernovae. The material collected along the borders of shells may fragment, become unstable under its own gravity, and create a new generation of stars. This is a variant of triggered star formation referred to as the collect-and-collapse scenario. The aim of our research is to compare numerical simulations of shell-like structures to observations and to search for and investigate regions of triggered star formation in the Milky Way.
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