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Exact transport
Streaming wave
A smooth, periodic radiation wave travels at the speed of light. Its phase and amplitude test transport accuracy.
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Exact transport
Streaming front
A sharp, bright half-domain crosses a nearly dark background. Exact cell averages track both moving edges through the periodic box.
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Telegraph equation
Gaussian pulse
A small Gaussian perturbation evolves in a fixed scattering medium. A Fourier solution of the telegraph equation supplies the reference.
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Steady diffusion
Equilibrium sphere
A smooth spherical emitter balances outward radiation transport. An error-function solution describes its steady diffusion equilibrium.
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Coupled radiation hydrodynamics
Subcritical radiative shock
Radiation heats gas ahead of a shock, forming a precursor whose gas temperature remains below the downstream equilibrium temperature.
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Coupled radiation hydrodynamics
Supercritical radiative shock
A faster shock produces a stronger radiative precursor. Gas ahead of the shock approaches the downstream equilibrium temperature.
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Coupled radiation hydrodynamics
Radiating blast wave
A spherical energy release drives a shock and radiation precursor into a radial atmosphere, evolved on a Cartesian mesh.
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Nonequilibrium radiation diffusion
Marshak wave
Boundary illumination heats initially cold stationary material. Radiation and material energy profiles are compared with the semi-analytic Marshak diffusion solution.
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