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A Domain Decomposition Reduced Order Model with Data Assimilation (DD-RODA)

Rossella Arcucci, César Quilodrán Casas, Dunhui Xiao Orcid Logo, Laetitia Mottet, Fangxin Fang, Pin Wu, Christopher Pain, Yi-Ke Guo

Parallel Computing: Technology Trends, Volume: 36, Pages: 189 - 198

Swansea University Author: Dunhui Xiao Orcid Logo

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DOI (Published version): 10.3233/apc200040

Abstract

We present a Domain Decomposition Reduced Order Data Assimilation (DD-RODA) model which combines Non-Intrusive Reduced Order Modelling (NIROM) method with a Data Assimilation (DA) model. The NIROM is defined on a partition of the domain in sub-domains with overlapping regions and the DA is defined o...

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Published in: Parallel Computing: Technology Trends
ISBN: 978-1-64368-070-5 978-1-64368-071-2
ISSN: 0927-5452 1879-808X
Published: IOS Press 2020
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa53995
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Abstract: We present a Domain Decomposition Reduced Order Data Assimilation (DD-RODA) model which combines Non-Intrusive Reduced Order Modelling (NIROM) method with a Data Assimilation (DA) model. The NIROM is defined on a partition of the domain in sub-domains with overlapping regions and the DA is defined on a partition of the domain in sub-domains without overlapping regions. This choice allows to avoid communications among the processes during the Data Assimilation phase. However, during the balance phase, the model exploits the domain decomposition implemented in DD-NIROM which balances the results among the processes exploiting overlapping regions. The model is applied to the pollutant dispersion within an urban environment. Simulations are performed using the open-source, finite-element, fluid dynamics model Fluidity.
Keywords: Numerical simulations, Reduced Order Models, Data Assimilation, Domain Decomposition
College: Faculty of Science and Engineering
Start Page: 189
End Page: 198

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