Simulation of nonlinear thermomechanical waves with an empirical low dimensional model

Authors:
Linxiang Wang;Roderick V. N. Melnik
Affiliations:
MCI, Faculty of Science and Engineering, University of Southern Denmark, Sonderborg, Denmark;Centre for Coupled Dynamics & Complex Systems, Wilfrid Laurier University, Waterloo, ON, Canada
Venue:
ICCS'05 Proceedings of the 5th international conference on Computational Science - Volume Part I
Year:
2005

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Abstract

In this paper we analyse the performance of a low dimensional model for the nonlinear thermo-mechanical waves. The model has been obtained by using proper orthogonal decomposition methods combined with a Galerkin projection. First, we analyse the original PDE model in order to obtain the system states at many time instances. Then, by using an empirical orthogonal basis extracted from our numerical results, we construct an empirical low dimensional model. Finally, we compare the results obtained with the original PDE model and those obtained with our low-dimensional model. These comparisons are carried out for mechanically induced phase transformations in a shape-memory alloy rod.