During a severe accident in a nuclear reactor an energetic molten fuel/coolant interaction could happen, where a multiphase flow of a steam-water mixture in a region which contain drops of a high-temperature melt. Under certain conditions, the melt droplets can be split into many small fragments, which leads to a sharp increase in the heat flux from the melt to the steam-water mixture.
Hello Mr. Saleh,
it denpends on the OF-version.
The v2006 has a chtMultiRegionTwoPhaseEulerFoam. You can simulate a liquid and its vapour in addition to the heat conduction in the solid parts. So obviously the Eulerian approach is used for temperature driven phase change and multi phase flow. The OF v7 does not have such solver yet I guess.
Notice: When you have complex, unstructured meshes (i.e. sanppyHexMesh) you have to take care about the splitting of the different domains in the chtMultiRegion-solvers.
But I don't think, that any OF can calculate the splitting of the solid parts due to thermally induced stress. But maybe somebody else knows better about that.
Regards
David
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