Study on the Particle Transport Calculation with Monte Carlo Method Based on Unstructured Grid
The traditional modeling method of constructing solid geometry cannot meet the problems of complex geometric transport,multi-physical coupling calculation,and large-scale nuclear radiation effect simulation.As a mesh space embedded in the traditional structural entity geometry,the unstructured grid geometry is created by using the finite element program ABAQUS,and the transport results in the unstructured mesh grid element are calculated by using the track length estimator of MCNP,and the element tracking is performed on the unstructured mesh grid.The results can be exported to ABAQUS or Paraview for visualization and other physical analysis.In this paper,we analyze two typical benchmark experiments:the Ueki fixed source and the Godiva critical source.The results show that the calculation deviation and the running time are proportional to the number of the input mesh grid cells and the order of the elements,and the results of the same order tetrahedron are smaller than that of hexahedron.The results of unstructural mesh grid calculation in this paper are in good agreement with those of traditional constructing solid geometry.
Unstructured meshParticle transportMonté carloFinite element method
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