Upscaling Uncertainty with Dynamic Discrepancy for a Multi-Scale Carbon Capture System
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- West Virginia Univ., Morgantown, WV (United States). Dept. of Mechanical and Aerospace Engineering
- National Energy Technology Lab., Morgantown, WV (United States)
- Mayo Clinic, Rochester, MN (United States)
Uncertainties from model parameters and model discrepancy from small-scale models impact the accuracy and reliability of predictions of large-scale systems. Inadequate representation of these uncertainties may result in inaccurate and overconfident predictions during scale-up to larger systems. Hence, multiscale modeling efforts must accurately quantify the effect of the propagation of uncertainties during upscaling. Using a Bayesian approach, we calibrate a small-scale solid sorbent model to thermogravimetric (TGA) data on a functional profile using chemistry-based priors. Crucial to this effort is the representation of model discrepancy, which uses a Bayesian smoothing splines (BSS-ANOVA) framework. Our uncertainty quantification (UQ) approach could be considered intrusive as it includes the discrepancy function within the chemical rate expressions; resulting in a set of stochastic differential equations. Such an approach allows for easily propagating uncertainty by propagating the joint model parameter and discrepancy posterior into the larger-scale system of rate expressions. In conclusion, the broad UQ framework presented here could be applicable to virtually all areas of science where multiscale modeling is used. Supplementary materials for this article are available online.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Office of Fossil Energy (FE)
- Grant/Contract Number:
- 89233218CNA000001
- OSTI ID:
- 1571589
- Report Number(s):
- LA-UR--14-26061
- Journal Information:
- Journal of the American Statistical Association, Journal Name: Journal of the American Statistical Association Journal Issue: 520 Vol. 112; ISSN 0162-1459
- Publisher:
- Taylor & FrancisCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Learning and Optimization with Bayesian Hybrid Models
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conference | July 2020 |
| On the Bayesian calibration of expensive computer models with input dependent parameters | text | January 2017 |
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