ORCID Profile
0000-0002-0510-9422
Current Organisations
Macquarie University
,
Melbourne Research, University of Melbourne
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Publisher: Springer International Publishing
Date: 2017
Publisher: Springer International Publishing
Date: 2017
Publisher: Elsevier BV
Date: 02-2022
Publisher: AIP Publishing
Date: 2019
DOI: 10.1063/1.5119645
Publisher: AIP Publishing
Date: 2021
DOI: 10.1063/5.0052227
Publisher: Elsevier BV
Date: 03-2019
Publisher: MDPI AG
Date: 14-03-2022
DOI: 10.3390/MATH10060928
Abstract: State-to-state numerical simulations of high-speed reacting flows are the most detailed but also often prohibitively computationally expensive. In this work, we explore the usage of machine learning algorithms to alleviate such a burden. Several tasks have been identified. Firstly, data-driven machine learning regression models were compared for the prediction of the relaxation source terms appearing in the right-hand side of the state-to-state Euler system of equations for a one-dimensional reacting flow of a N2/N binary mixture behind a plane shock wave. Results show that, by appropriately choosing the regressor and opportunely tuning its hyperparameters, it is possible to achieve accurate predictions compared to the full-scale state-to-state simulation in significantly shorter times. Secondly, several strategies to speed-up our in-house state-to-state solver were investigated by coupling it with the best-performing pre-trained machine learning algorithm. The embedding of machine learning algorithms into ordinary differential equations solvers may offer a speed-up of several orders of magnitude. Nevertheless, performances are found to be strongly dependent on the interfaced codes and the set of variables onto which the coupling is realized. Finally, the solution of the state-to-state Euler system of equations was inferred by means of a deep neural network by-passing the use of the solver while relying only on data. Promising results suggest that deep neural networks appear to be a viable technology also for this task.
Publisher: Springer Science and Business Media LLC
Date: 03-2020
Publisher: Elsevier BV
Date: 10-2020
Publisher: Wiley
Date: 23-10-2016
DOI: 10.1002/FLD.4183
Location: No location found
No related grants have been discovered for LORENZO CAMPOLI.