Istituto di Ingegneria Biomedica     
Simoni L., Secchi S., Schrefler B. Numerical Difficulties and Computational Procedures for Thermo-Hydro-Mechanical Coupled Problems of Saturated Porous Media. In: Computational Mechanics, vol. 43 pp. 179 - 89. Springer, 2008.
This paper analyses the numerical difficulties commonly encountered in solving fully coupled numerical models and proposes a numerical strategy apt to overcome them. The proposed procedure is based on space refinement and time adaptivity. The latter, which in mainly studied here, is based on the use of a finite element approach in the space domain and a Discontinuous Galerkin approximation within each time span. Error measures are defined for the jump of the solution at each time station. These constitute the parameters allowing for the time adaptivity. Some care is however, needed for a useful definition of the jump measures. Numerical tests are presented firstly to demonstrate the advantages and shortcomings of the method over the more traditional use of fin
URL: http://www.springerlink.com/content/u37817g82354036q/
DOI: 10.1007/s00466-008-0302-2
Subject h-refinement in space
time discrete
time step adaptivity
discrete crack models
cohesive fracture
thermal loads

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