Publications (15)
Mancha3D code: Multi-purpose Advanced Non-ideal MHD Code for High resolution simulations in Astrophysics
M. Modestov, E. Khomenko, N. Vitas +14
The Mancha3D code is a versatile tool for numerical simulations of magnetohydrodynamic processes in solar/stellar atmospheres. The code includes non-ideal physics derived from plas…
Liquid metal flow controls at liquid metal experiment
M. Modestov, E. Kolemen, E. P. Gilson +4
Liquid metal flow behavior under magnetic field and electric current is investigated in experiment and numerical simulations. Several aspects of the resulted Lorentz force action a…
Ultra-fast spin avalanches in crystals of molecular magnets in terms of magnetic detonation
M. Modestov, V. Bychkov, M. Marklund
Recent experiments (Decelle et al., Phys. Rev. Lett. 102, 027203 (2009)) discovered an ultra-fast regime of spin avalanches in crystals of magnetic magnets, which was three orders…
A pulsating regime of magnetic deflagration
M. Modestov, V. Bychkov, M. Marklund
The stability of a magnetic deflagration front in a collection of molecular magnets, such as Mn_12-acetate, is considered. It is demonstrated that stationary deflagration is unstab…
Modeling the thermal conduction in the solar atmosphere with the code MANCHA3D
AnamarÃa Navarro, E. Khomenko, M. Modestov +1
Thermal conductivity is one of the important mechanisms of heat transfer in the solar corona. In the limit of strongly magnetized plasma, it is typically modeled by Spitzer's expre…
Convergence study of ambipolar diffusion in realistic simulations of magneto-convection
E. Khomenko, N. Vitas, M. Collados +1
The aim of this paper is to improve our understanding of the heating mechanisms of the solar chromosphere via realistic three-dimensional (3D) modeling of solar magneto-convection,…
A model for the dynamics and internal structure of planar doping fronts in organic semiconductors
M. Modestov, V. Bychkov, D. Valiev +1
The dynamics and internal structure of doping fronts in organic semiconductors are investigated theoretically using an extended drift-diffusion model for ions, electrons and holes.…
Magnetic detonation structure in crystals of molecular magnets
O. Jukimenko, M. Modestov, M. Marklund +1
Experimentally detected ultrafast spin-avalanches spreading in crystals of molecular (nano)magnets (Decelle et al., Phys. Rev. Lett. 102, 027203 (2009)), have been recently explain…
Fast electrochemical doping due to front instability in organic semiconductors
V. Bychkov, P. Matyba, V. Akkerman +6
The electrochemical doping transformation in organic semiconductor devices is studied in application to light-emitting cells. It is shown that the device performance can be signifi…
Doping front instabilities in organic semiconductors: a means for optimizing optoelectronic devices
V. Bychkov, O. Yukhimenko, M. Modestov +1
Recently, it was demonstrated that electrochemical doping fronts in organic semiconductors ex- hibit a new fundamental instability growing from multidimensional perturbations [Phys…
Anisotropic properties of spin avalanches in crystals of nanomagnets
C. M. Dion, O. Jukimenko, M. Modestov +2
Anisotropy effects for spin avalanches in crystals of nanomagnets are studied theoretically with the external magnetic field applied at an arbitrary angle to the easy axis. Startin…
Multilevel model for magnetic deflagration in nanomagnet crystals
O. Jukimenko, M. Modestov, C. M. Dion +2
We extend the existing theoretical model for determining the characteristic features of magnetic deflagration in nanomagnet crystals. For the first time, all energy levels are acco…
Model of the electrochemical conversion of an undoped organic semiconductor film to a doped conductor film
M. Modestov, V. Bychkov, G. Brodin +4
We develop a model describing the electrochemical conversion of an organic semiconductor (specifically, the active material in a light-emitting electrochemical cell) from the undop…
Counterpart of the Darrieus-Landau instability at a magnetic deflagration front
O. Jukimenko, M. Modestov, C. M. Dion +2
The magnetic instability at the front of the spin avalanche in a crystal of molecular magnets is considered. This phenomenon reveals similar features with the Darrieus-Landau insta…
Solar vortex detection methods in MHD simulations: impact of magnetic field and spatial resolution
M. Koll Pistarini, E. Khomenko, T. Felipe +1
The aim of this paper is to investigate the influence of different magnetic field configurations and spatial resolutions on vortex structures. We analyzed a set of six three-dimens…