24 citations · 115 across the 9 of their papers we have counts for
9 papers
Solar -mode damping rates: insight from a 3D hydrodynamical simulation
K. Belkacem, F. Kupka, R. Samadi +1
Space-borne missions CoRoT and Kepler have provided a rich harvest of high-quality photometric data for solar-like pulsators. It is now possible to measure damping rates for hundre…
Structure of the solar photosphere studied from the radiation hydrodynamics code ANTARES
P. Leitner, B. Lemmerer, A. Hanslmeier +4
The ANTARES radiation hydrodynamics code is capable of simulating the solar granulation in detail unequaled by direct observation. We introduce a state-of-the-art numerical tool to…
APSARA: A multi-dimensional unsplit fourth-order explicit Eulerian hydrodynamics code for arbitrary curvilinear grids
Annop Wongwathanarat, Hannes Grimm-Strele, Ewald Müller
We present a new fourth-order, finite-volume hydrodynamics code named Apsara. The code employs a high-order, finite-volume method for mapped coordinates with extensions for nonline…
Two-dimensional segmentation of small convective patterns in radiation hydrodynamics simulations
B. Lemmerer, D. Utz, A. Hanslmeier +4
Recent results from high-resolution solar granulation observations indicate the existence of a population of small granular cells that are smaller than 600 km in diameter. These sm…
Achievable Efficiency of Numerical Methods for Simulations of Solar Surface Convection
Hannes Grimm-Strele, Friedrich Kupka, Herbert J. Muthsam
We investigate the achievable efficiency of both the time and the space discretisation methods used in Antares for mixed parabolic-hyperbolic problems. We show that the fifth order…
Curvilinear Grids for WENO Methods in Astrophysical Simulations
Hannes Grimm-Strele, Friedrich Kupka, Herbert J. Muthsam
We investigate the applicability of curvilinear grids in the context of astrophysical simulations and WENO schemes. With the non-smooth mapping functions from Calhoun et al. (2008)…
Realistic Simulations of Stellar Surface Convection with ANTARES: I. Boundary Conditions and Model Relaxation
H. Grimm-Strele, F. Kupka, B. Löw-Baselli +3
We have implemented open boundary conditions into the ANTARES code to increase the realism of our simulations of stellar surface convection. Even though we greatly benefit from the…
A Low Mach Number Solver: Enhancing Applicability
Natalie Happenhofer, Hannes Grimm-Strele, Friedrich Kupka +2
In astrophysics and meteorology there exist numerous situations where flows exhibit small velocities compared to the sound speed. To overcome the stringent timestep restrictions po…
Simulations of stellar convection, pulsation and semiconvection
Herbert J. Muthsam, Friedrich Kupka, Eva Mundprecht +3
We report on modelling in stellar astrophysics with the ANTARES code. First, we describe properties of turbulence in solar granulation as seen in high-resolution calculations. Then…