Reduced-order modelling for linear heat conduction with parametrised moving heat sources

Journal article
(Original article)


Publication Details

Author(s): Brands B, Mergheim J, Steinmann P
Journal: GAMM-Mitteilungen
Publication year: 2016
Volume: 39
Journal issue: 2
Pages range: 170-188
ISSN: 0936-7195
eISSN: 1522-2608
Language: English


Abstract


The purpose of Reduced-Order Modelling (ROM) is to substantially lower the computational cost of numerical simulations. As an example proper orthogonal decomposition (POD), which is optimal in a least-square sense, is applied to compute basis functions using existing solutions, e.g. from previously computed simulations. These reduced basis functions are subsequently used for the Galerkin projection of the governing equations.



There is intense research on the application of ROM to parametrised partial differential equations (pPDE). However, in the case of transient equations research on ROM is mainly focused on models with constant parameters. In this paper an approach to cope with the linear heat conduction problem with a moving heat source is introduced. Problems of such kind are encountered in the simulation of laser or electron beam melting processes in additive manufacturing. To construct the reduced basis a nested POD method is used to mitigate the com-putational costs of large-scale eigenproblems. To further gain computational efficiency the discrete empirical interpolation method (DEIM) is applied to deal with non-affine parameter dependencies.



FAU Authors / FAU Editors

Brands, Benjamin
Lehrstuhl für Technische Mechanik
Mergheim, Julia PD Dr.
Lehrstuhl für Technische Mechanik
Steinmann, Paul Prof. Dr.-Ing.
Lehrstuhl für Technische Mechanik


How to cite

APA:
Brands, B., Mergheim, J., & Steinmann, P. (2016). Reduced-order modelling for linear heat conduction with parametrised moving heat sources. GAMM-Mitteilungen, 39(2), 170-188. https://dx.doi.org/10.1002/gamm.201610011

MLA:
Brands, Benjamin, Julia Mergheim, and Paul Steinmann. "Reduced-order modelling for linear heat conduction with parametrised moving heat sources." GAMM-Mitteilungen 39.2 (2016): 170-188.

BibTeX: 

Last updated on 2019-23-05 at 08:23

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