High-order discontinuous Galerkin nonlocal transport and energy equations scheme for radiation hydrodynamics

0478364 - FZÚ 2018 RIV US eng J - Journal Article
Holec, M. - Limpouch, J. - Liska, R. - Weber, Stefan A.
High-order discontinuous Galerkin nonlocal transport and energy equations scheme for radiation hydrodynamics.
International Journal for Numerical Methods in Fluids. Roč. 83, č. 10 (2017), s. 779-797. ISSN 0271-2091. E-ISSN 1097-0363
R&D Projects: GA MŠMT EF15_008/0000162; GA MŠMT LQ1606
Grant - others:ELI Beamlines(XE) CZ.02.1.01/0.0/0.0/15_008/0000162
Institutional support: RVO:68378271
Keywords : radiation hydrodynamics * nonlocal transport * Knudsen number * multigroup diffusion * radiation coupling
OECD category: Nuclear physics
Impact factor: 1.673, year: 2017

The nonlocal theory of the radiative energy transport in laser-heated plasmas of arbitrary ratio of the characteristic inhomogeneity scale length to the photon mean free paths is applied to define the closure relations of a hydrodynamic system. The corresponding transport phenomena cannot be described accurately using the Chapman-Enskog approach, that is, with the usual fluid approach dealing only with local values and derivatives. Thus, we directly solve the photon transport equation allowing one to take into account the effect of long-range photon transport. The proposed approach is based on the Bhatnagar-Gross-Krook collision operator using the photon mean free path as a unique parameter.

Permanent Link: http://hdl.handle.net/11104/0274465