A computational study of nodal-based tetrahedral element behavior.
per
Gullerud, Arne S.
org
United States. Department of Energy.
United States
Sandia National Laboratories
2010-09-01
eng
This report explores the behavior of nodal-based tetrahedral elements on six sample problems, and compares their solution to that of a corresponding hexahedral mesh. The problems demonstrate that while certain aspects of the solution field for the nodal-based tetrahedrons provide good quality results, the pressure field tends to be of poor quality. Results appear to be strongly affected by the connectivity of the tetrahedral elements. Simulations that rely on the pressure field, such as those which use material models that are dependent on the pressure (e.g. equation-of-state models), can generate erroneous results. Remeshing can also be strongly affected by these issues. The nodal-based test elements as they currently stand need to be used with caution to ensure that their numerical deficiencies do not adversely affect critical values of interest.
50 p.
Shape
Computerized Simulation
Mesh Generation
97 Mathematical Methods And Computing
Mathematical Solutions
OSTI
UNTGD
text_report
text
SAND2010-6309
AC04-94AL85000
10.2172/1007319
1007319
mphillips
DC
ark:/67531/metadc835712
2016-05-19, 15:16:37
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htarver
2016-11-23, 11:16:26