Roughness-Resolved Large-Eddy Simulation of Additive Manufacturing-Like Channel Flows

Author:

Meynet Serge1,Barge Alexis2,Moureau Vincent1,Balarac Guillaume34,Lartigue Ghislain1,Hadjadj Abdellah1

Affiliation:

1. Normandie Université, UNIROUEN, INSA of Rouen CORIA, CNRS UMR6614, , 76000 Rouen , France

2. University of Grenoble Alpes, CNRS, Grenoble-INP , LEGI UMR 5519, Grenoble F-38041 , France

3. University of Grenoble Alpes, CNRS, Grenoble-INP , LEGI UMR 5519, Grenoble F-38041 , France ;

4. Institut Universitaire de France (IUF) , 75000 Paris , France

Abstract

Abstract In the last decade, progresses in additive manufacturing (AM) have paved the way for optimized heat exchangers whose disruptive design will heavily rely on predictive numerical simulations. However, due to typical roughness induced by AM, current wall models used in steady and unsteady 3D Navier–Stokes simulations do not take into account such characteristics. For the development and assessment of novel wall models for AM, a high-fidelity roughness-resolved large-eddy simulation (RRLES) database is built. This article describes the numerical setup and the methodology used for conducting RRLES, from surface generation to postprocessing. In addition, three different cases representing two printing directions plus a streamwise and spanwise isotropic case are investigated. While the roughness distributions are the same in the three cases, the effective slope (ES) is very different, and the impact of this parameter on turbulence and heat transfer is analyzed at different Reynolds numbers.

Funder

European Commission

Publisher

ASME International

Subject

Mechanical Engineering

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