Matthias Schäfer

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In this paper, we investigate moment methods from a general point of view using an operator notation. This theoretical approach lets us explore the moment closure problem in more detail. This gives rise to a new idea, proposed in [14, 15], of how to improve the well-known PN approximations. We systematically develop a diffusive correction to the PN(More)
The steady-state simplified P N approximation to the radiative transport equation has been successfully applied to many problems involving radiation. Recently, time-dependent simplified P N equations have been derived by an asymptotic analysis similar to the asymptotic derivation of the steady-state SP N equations [7]. In this paper, we present(More)
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