Journal article
Uncertainty quantification for modeling pulsed laser ablation of aluminum considering uncertainty in the temperature-dependent absorption coefficient
International journal of heat and mass transfer, Vol.120, pp.515-522
05/2018
DOI: 10.1016/j.ijheatmasstransfer.2017.12.068
Abstract
•The effects of uncertain absorption coefficient on laser ablation are investigated.•A generalized polynomial chaos method with FEA is used to quantify uncertainty.•A 10% change of absorption coefficient gives a 1.8% change in mean ablation depths.•Mean predictions of ablation depths compare well with experimental data.
In this paper, an extension of the result of Wang et al. (“Modeling pulsed laser ablation of aluminum with finite element analysis considering material moving front,” Int. J. Heat & Mass Transfer, 113, 1246–1253, 2017) concerning the problem of uncertainty quantification for pulsed laser ablation (PLA) of aluminum is considered, when the source of uncertainty is due to an inherent randomness of the temperature-dependent absorption coefficient. In particular, we use a generalized polynomial chaos (gPC) method to incorporate the parameter uncertainty for the temperature-dependent absorption coefficient within the representation of the laser heat conduction phenomena. Furthermore, numerical simulation studies for the PLA of aluminum, with nanosecond Nd:YAG 266 nm pulsed laser, that demonstrate the proposed gPC predictions are presented. Finally, a sensitivity study is performed to identify whether small changes in the lower and/or upper parameter values of the absorption coefficient provide the most variance in the thermal and ablation responses.
Details
- Title: Subtitle
- Uncertainty quantification for modeling pulsed laser ablation of aluminum considering uncertainty in the temperature-dependent absorption coefficient
- Creators
- Yeqing Wang - University of FloridaGetachew K Befekadu - University of FloridaHongtao Ding - University of IowaDavid W Hahn - University of Florida
- Resource Type
- Journal article
- Publication Details
- International journal of heat and mass transfer, Vol.120, pp.515-522
- DOI
- 10.1016/j.ijheatmasstransfer.2017.12.068
- ISSN
- 0017-9310
- eISSN
- 1879-2189
- Publisher
- Elsevier Ltd
- Grant note
- DOI: 10.13039/100006602, name: Air Force Research Laboratory; DOI: 10.13039/100006602, name: Air Force Research Laboratory
- Language
- English
- Date published
- 05/2018
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984196502602771
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