Step 52

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This program shows how to use Runge-Kutta methods to solve a time-dependent problem. It solves a small variation of the heat equation discussed first in step but, since the purpose of this program is only to demonstrate using more advanced ways to interface with deal. II's time stepping algorithms, only solves a simple problem on a uniformly refined mesh. In this example, we solve the one-group time-dependent diffusion approximation of the neutron transport equation see step for the time-independent multigroup diffusion. This is a model for how neutrons move around highly scattering media, and consequently it is a variant of the time-dependent diffusion equation — which is just a different name for the heat equation discussed in step , plus some extra terms.
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It solves a small variation of the heat equation discussed first in step but, since the purpose of this program is only to demonstrate using. Using the 52 step visual on the cover page, the workbook takes you through each step with items to consider and document along the way. 52 Step Project.
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