Enhancements of the G-Scheme Framework

The G-Scheme is a well established framework for multi-scale adaptive model reduction, whose effectiveness was demonstrated with reference to a number of test models, together with an identification of the critical areas that were in need of further theoretical and computational refinement. In this...

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Published inFlow, turbulence and combustion Vol. 101; no. 4; pp. 1023 - 1033
Main Authors Valorani, Mauro, Ciottoli, Pietro Paolo, Malpica Galassi, Riccardo, Paolucci, Samuel, Grenga, Temistocle, Martelli, Emanuele
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Netherlands 01.12.2018
Springer Nature B.V
Subjects
Automotive Engineering
Computing time
Engineering
Engineering Fluid Dynamics
Engineering Thermodynamics
Fluid- and Aerodynamics
Heat and Mass Transfer
Model reduction
Autoignition
Explicit solvers
Stiff solvers
Multi-scale dynamical systems
Chemical kinetics
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Summary:The G-Scheme is a well established framework for multi-scale adaptive model reduction, whose effectiveness was demonstrated with reference to a number of test models, together with an identification of the critical areas that were in need of further theoretical and computational refinement. In this communication, we report on how we enhanced the solver performance. Two new features involving (i) the criteria to identify the fast and slow subspace dimensions, and (ii) a criterion to decide if and when the reuse of the CSP Basis is feasible without deteriorating the overall performance of the solver, have been proved able to increase significantly the computational efficiency of the solver without sacrificing its accuracy.
ISSN:1386-6184
1573-1987
DOI:10.1007/s10494-018-9942-2