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Prismatic versus tetrahedral elements in three‐dimensional finite element analyses of subsurface systems
Author(s) -
Pini G.
Publication year - 1991
Publication title -
numerical methods for partial differential equations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.901
H-Index - 61
eISSN - 1098-2426
pISSN - 0749-159X
DOI - 10.1002/num.1690070104
Subject(s) - tetrahedron , mathematics , finite element method , grid , geometry , computational science , element (criminal law) , space (punctuation) , computer science , structural engineering , engineering , political science , law , operating system
A mesh of prismatic or tetrahedral elements automatically generated from an initial triangular grid is used to integrate 3‐D flow equation in space. Many numerical comparisons between these two models have been performed. The results show that integration with tetrahedrons is as accurate as integration with prisms but much more efficient. The CPU time of solution with prismatic elements is about three times greater than that required employing tetrahedral elements.