INVESTIGADORES
HUESPE Alfredo Edmundo
artículos
Título:
A FAST CONVERGENT AND ACCURATE TEMPERATURE MODEL FOR PHASE-CHANGE HEAT CONDUCTION
Autor/es:
FACHINOTTI V.; A. CARDONA; A.E HUESPE
Revista:
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
Editorial:
JOHN WILEY & SONS LTD
Referencias:
Año: 1999 vol. 44 p. 1863 - 1884
ISSN:
0029-5981
Resumen:
This work proposes a temperature-based nite element model for transient heat conduction involving phasechange. Like preceding temperature-based models, it is characterized by the discontinuous spatial integration over the elements a ected by the phase-change. Using linear triangles or tetrahedrals, integration can be performed in a closed analytical way, assuring an exact evaluation of the discrete balance equation. Because of its unconditional stability, an Euler-backward time-stepping scheme is implemented. A crucial fact is thecomputation of the exact tangent matrices for the Newton{Raphson solution of the non-linear system of discretized equations. Efficiency of the model is tested by means of the results obtained for the Neumann problem and the solidi cation of a steel ingot
