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Minimum time‐step size for diffusion problem in FEM analysis
Author(s) -
Thomas H. R.,
Zhou Z.
Publication year - 1997
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/(sici)1097-0207(19971030)40:20<3865::aid-nme246>3.0.co;2-c
Subject(s) - finite element method , diffusion , mathematics , mathematical optimization , computer science , structural engineering , engineering , physics , thermodynamics
In this paper oscillation of results arising from the use of a time‐step size which is less than the minimum required is examined. The phenomenon is summarised to give two requirements that the solution of boundary problems has to satisfy. An approach to derive the minimum time‐step size for various kinds of elements is developed. A theoretical verification is presented for the one‐dimensional two‐noded element case and a numerical examination of the criteria explored for the two‐dimensional eight‐noded element case. © 1997 John Wiley & Sons, Ltd.