Axisymmetric cooling and spreading (BM3 from [1])
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Simulation of a hot, viscous fluid injected into a horizontal plane, where 
it spreads and cools in an axisymmetric fashion.
This test introduces a Newtonian fluid through an orifice of the lower wall. 
Modelled as a hot Newtonian liquid, the fluid dissipates heat via conduction 
with the plane and through radiation and convection with the surrounding air 
at its free surface.

This test refers to an analogue experiment reported in [2], denoted as C14, 
where a hot silicone oil (Rhodorsil® 47V 5000 or 47V 12500, dyed red) is 
injected, at a constant supply rate R = 2.2 * 10^-8 m^3/s, onto a horizontal 
plane of polystyrene from a point source of 2-4 mm of radius.

Executing:

./Allrun

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Execution SUMMARY:

- blockMesh generates a rectangular block.
- snappyHexMesh refines the mesh around the centre of the lower wall.
- topoSet and createPatch create the hole at the centre of the lower wall.
- The solver adopted for this test case in interThermalRadConvFoam, a new
variation of the classic interFoam.
- The presence of the dictionary dynamicMeshDict inside the "constant" folder
produce the dynamic mesh refinement during the runtime. The refinement is 
performed at the interface between the two fluids, namely where the value of 
alpha is between 0.01 and 0.09.

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The code execution can be performed also in parallel:

./Allrun-parallel

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References:

[1] B. Cordonnier, E. Lev, and F. Garel, “Benchmarking lava-flow models,” 
Geological Society, London, Special Publications, vol. 426, pp. 425–445, 2015.

[2] F. Garel, E. Kaminski, S. Tait, and A. Limare, “An experimental study 
of the surface thermal signature of hot subaerial isoviscous gravity currents: 
Implications for thermal monitoring of lava flows and domes,” Journal of 
Geophysical Research: Solid Earth, vol. 117, 2012.
