MIXED FINITE ELEMENT FORMULATION FOR NON-ISOTHERMAL POROUS MEDIA IN DYNAMICS

被引：0
作者：
Cao, T. D. [1 ]
Wang, Y. [1 ]
Sanavia, L. [2 ]
Schrefler, B. A. [2 ]
机构：
[1] Tech Univ Darmstadt, Dept Mech Engn, Otto Berndt Str 2, D-64287 Darmstadt, Germany
[2] Univ Padua, Dipartimento Ingn Civile Edile & Ambientale, I-35131 Padua, Italy
来源：
PARTICLE-BASED METHODS IV-FUNDAMENTALS AND APPLICATIONS | 2015年
关键词：
Hydro-Thermo-Mechanical processes; FEM; Mixed elements; Multiphase materials; GENERAL CONSERVATION EQUATIONS;
D O I：
暂无
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
We present a mixed finite element formulation for the spatial discretization in dynamic analysis of non-isothermal variably saturated porous media using different order of approximating functions for solid displacements and fluid pressures/temperature. It is known in fact that there are limitations on the approximating functions N-u and N-p for displacements and pressures if the BabuskaBrezzi convergence conditions or their equivalent [5] are to be satisfied. Although this formulation complicates the numerical implementation compared to equal order interpolation, it provides competitive advantages e.g. in speed of computation, accuracy and convergence.
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页码：140 / 148
页数：9
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