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Sensitivity analysis and mechanism simplification using the G-Scheme framework

Sensitivity analysis and mechanism simplification using the G-Scheme framework
Sensitivity analysis and mechanism simplification using the G-Scheme framework

We have developed specific procedures that utilize the G-Scheme modal decomposition to carry out the sensitivity analysis along-with the numerical integration of chemical kinetics systems, so as to understand the roles of the most important reactions, and to identify the most important reaction paths of the processes. The sensitivity information allow to generate skeletal kinetic mechanisms for chemical kinetics mechanism. The procedures are based on participation indices constructed from the G-Scheme dynamics decomposition, but can be applied to databases generated by any numerical solver. The effectiveness of these procedures is demonstrated with reference to the auto-ignition problem of a homogeneous hydrogen/air mixture.

Adaptive scheme, Model analysis, Model reduction, Multiple time scales
0010-2180
275-287
Grenga, Temistocle
be0eba30-74b5-4134-87e7-3a2d6dd3836f
Paolucci, Samuel
d9d7b875-1826-43d8-8058-c48802001e29
Valorani, Mauro
831fae90-ef8a-49fb-bef8-123a70ef8024
Grenga, Temistocle
be0eba30-74b5-4134-87e7-3a2d6dd3836f
Paolucci, Samuel
d9d7b875-1826-43d8-8058-c48802001e29
Valorani, Mauro
831fae90-ef8a-49fb-bef8-123a70ef8024

Grenga, Temistocle, Paolucci, Samuel and Valorani, Mauro (2018) Sensitivity analysis and mechanism simplification using the G-Scheme framework. Combustion and Flame, 189, 275-287. (doi:10.1016/j.combustflame.2017.10.039).

Record type: Article

Abstract

We have developed specific procedures that utilize the G-Scheme modal decomposition to carry out the sensitivity analysis along-with the numerical integration of chemical kinetics systems, so as to understand the roles of the most important reactions, and to identify the most important reaction paths of the processes. The sensitivity information allow to generate skeletal kinetic mechanisms for chemical kinetics mechanism. The procedures are based on participation indices constructed from the G-Scheme dynamics decomposition, but can be applied to databases generated by any numerical solver. The effectiveness of these procedures is demonstrated with reference to the auto-ignition problem of a homogeneous hydrogen/air mixture.

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More information

Published date: 17 January 2018
Additional Information: Publisher Copyright: © 2017 The Combustion Institute
Keywords: Adaptive scheme, Model analysis, Model reduction, Multiple time scales

Identifiers

Local EPrints ID: 480932
URI: http://eprints.soton.ac.uk/id/eprint/480932
ISSN: 0010-2180
PURE UUID: e5e27deb-78c7-4725-83e8-23cdd782a304
ORCID for Temistocle Grenga: ORCID iD orcid.org/0000-0002-9465-9505

Catalogue record

Date deposited: 10 Aug 2023 16:59
Last modified: 06 Jun 2024 02:16

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Contributors

Author: Temistocle Grenga ORCID iD
Author: Samuel Paolucci
Author: Mauro Valorani

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