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Erschienen in:
Machine-Learning-Based Control of Perturbed and Heated Channel Flows Kapitel lesen Erstes Kapitel lesen

2021 | OriginalPaper | Buchkapitel

A Data-Driven Wall-Shear Stress Model for LES Using Gradient Boosted Decision Trees

verfasst von : Sarath Radhakrishnan, Lawrence Adu Gyamfi, Arnau Miró, Bernat Font, Joan Calafell, Oriol Lehmkuhl

Erschienen in: High Performance Computing

Verlag: Springer International Publishing

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Abstract

With the recent advances in machine learning, data-driven strategies could augment wall modeling in large eddy simulation (LES). In this work, a wall model based on gradient boosted decision trees is presented. The model is trained to learn the boundary layer of a turbulent channel flow so that it can be used to make predictions for significantly different flows where the equilibrium assumptions are valid. The methodology of building the model is presented in detail. The experiment conducted to choose the data for training is described. The trained model is tested a posteriori on a turbulent channel flow and the flow over a wall-mounted hump. The results from the tests are compared with that of an algebraic equilibrium wall model, and the performance is evaluated. The results show that the model has succeeded in learning the boundary layer, proving the effectiveness of our methodology of data-driven model development, which is extendable to complex flows.

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Vorheriges Kapitel Turbomachinery Blade Surrogate Modeling Using Deep Learning
Nächstes Kapitel Nonlinear Mode Decomposition and Reduced-Order Modeling for Three-Dimensional Cylinder Flow by Distributed Learning on Fugaku
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Metadaten
Titel
A Data-Driven Wall-Shear Stress Model for LES Using Gradient Boosted Decision Trees
verfasst von
Sarath Radhakrishnan
Lawrence Adu Gyamfi
Arnau Miró
Bernat Font
Joan Calafell
Oriol Lehmkuhl
Copyright-Jahr
2021
Buch
High Performance Computing

Print ISBN: 978-3-030-90538-5

Electronic ISBN: 978-3-030-90539-2

Copyright-Jahr: 2021

DOI
https://doi.org/10.1007/978-3-030-90539-2_7

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