Zobrazeno 1 - 10
of 163
pro vyhledávání: '"NIEMEYER, J. C."'
Major mergers are considered to be a significant source of turbulence in clusters. We performed a numerical simulation of a major merger event using nested-grid initial conditions, adaptive mesh refinement, radiative cooling of primordial gas, and a
Externí odkaz:
http://arxiv.org/abs/1705.06933
Baryonic streaming motions produced prior to the epoch of recombination became supersonic during the cosmic dark ages. Various studies suggest that such streaming velocities change the halo statistics and also influence the formation of Population II
Externí odkaz:
http://arxiv.org/abs/1311.5866
Autor:
Schmidt, W., Almgren, A. S., Braun, H., Engels, J. F., Niemeyer, J. C., Schulz, J., Mekuria, R. R., Aspden, A. J., Bell, J. B.
We investigate turbulence generated by cosmological structure formation by means of large eddy simulations using adaptive mesh refinement. In contrast to the widely used implicit large eddy simulations, which resolve a limited range of length scales
Externí odkaz:
http://arxiv.org/abs/1309.3996
Black holes of a billion solar masses are observed in the infant universe a few hundred million years after the Big Bang. The direct collapse of protogalactic gas clouds in primordial halos with $\rm T_{vir} \geq 10^{4} K$ provides the most promising
Externí odkaz:
http://arxiv.org/abs/1309.1097
Publikováno v:
ASP Conf. Proc. 453 (2012) 151
FEARLESS (Fluid mEchanics with Adaptively Refined Large Eddy SimulationS) is a numerical scheme for modelling subgrid-scale turbulence in cosmological adaptive mesh refinement simulations. In this contribution, the main features of this tool will be
Externí odkaz:
http://arxiv.org/abs/1109.2042
Publikováno v:
MNRAS 414 (2011) 2297
The injection and evolution of turbulence in the intergalactic medium is studied by means of mesh-based hydrodynamical simulations, including a subgrid scale (SGS) model for small-scale unresolved turbulence. The simulations show that the production
Externí odkaz:
http://arxiv.org/abs/1102.3352
Context: The thermal instability is one of the dynamical agents for turbulence in the diffuse interstellar medium, where both, turbulence and thermal instability interact in a highly non-linear manner. Aims: We study basic properties of turbulence in
Externí odkaz:
http://arxiv.org/abs/1009.2871
Publikováno v:
Astrophys.J.710:1683-1693,2010
The delayed detonation model describes the observational properties of the majority of type Ia supernovae very well. Using numerical data from a three-dimensional deflagration model for type Ia supernovae, the intermittency of the turbulent velocity
Externí odkaz:
http://arxiv.org/abs/0911.4345
Context: Turbulent deflagrations of Chandrasekhar mass White Dwarfs are commonly used to model Type Ia Supernova explosions. In this context, rapid rotation of the progenitor star is plausible but has so far been neglected. Aims: The aim of this work
Externí odkaz:
http://arxiv.org/abs/0911.3540
Publikováno v:
AIP Conf.Proc.1241:928-934,2010
FEARLESS (Fluid mEchanics with Adaptively Refined Large Eddy SimulationS) is a new numerical scheme arising from the combined use of subgrid scale (SGS) model for turbulence at the unresolved length scales and adaptive mesh refinement (AMR) for resol
Externí odkaz:
http://arxiv.org/abs/0911.2629