Nonlinear variants of the TR/BDF2 method for thermal radiative diffusion
- Additional Document Info
- View All
We apply the Trapezoidal/BDF2 (TR/BDF2) temporal discretization scheme to nonlinear grey radiative diffusion. This is a scheme that is not well-known within the radiation transport community, but we show that it offers many desirable characteristics relative to other second-order schemes. Several nonlinear variants of the TR/BDF2 scheme are defined and computationally compared with the Crank-Nicholson scheme. It is found for our test problems that the most accurate TR/BDF2 schemes are those that are fully iterated to nonlinear convergence, but the most efficient TR/BDF2 scheme is one based upon a single Newton iteration. It is also shown that neglecting the contributions to the Jacobian matrix from the cross-sections, which is often done due to a lack of smooth interpolations for tabular cross-section data, has a significant impact upon efficiency. 2010 Elsevier Inc.
JOURNAL OF COMPUTATIONAL PHYSICS
author list (cited authors)
Edwards, J. D., Morel, J. E., & Knoll, D. A.
complete list of authors
Edwards, Jarrod D||Morel, Jim E||Knoll, Dana A