A robust S_N-DG-approximation for radiation transport in optically thick and diffusive regimes Academic Article

abstract

• We introduce a new discontinuous Galerkin (DG) method with reduced upwind stabilization for the linear Boltzmann equation applied to particle transport. The asymptotic analysis demonstrates that the new formulation does not suffer from the limitations of standard upwind methods in the thick diffusive regime; in particular, the new method yields the correct diffusion limit for any approximation order, including piecewise constant discontinuous finite elements. Numerical tests on well-established benchmark problems demonstrate the superiority of the new method. The improvement is particularly significant when employing piecewise constant DG approximation for which standard upwinding is known to perform poorly in the thick diffusion limit. 2011 Elsevier Inc.

authors

• Ragusa, Jean

published proceedings

• JOURNAL OF COMPUTATIONAL PHYSICS

author list (cited authors)

• Ragusa, J. C., Guermond, J., & Kanschat, G.

citation count

• 19

complete list of authors

• Ragusa, JC||Guermond, J-L||Kanschat, G

publication date

• February 2012

publisher

• Elsevier  Publisher

keywords

• Discontinuous Galerkin
• Radiation Transport
• Thick Diffusion Limit
• Upwind Technique

Digital Object Identifier (DOI)

• 10.1016/j.jcp.2011.11.017

start page

• 1947

end page

• 1962

volume

• 231

issue

• 4

URL

• http://dx.doi.org/10.1016/j.jcp.2011.11.017