Modeling of high-Re, incompressible, non-equilibrium, rough-wall boundary layers for naval applications under NATO-AVT349
Paper in proceeding, 2022

This paper discusses the modeling activity of the NATO-STO Research Task Group AVT-349. The aim of this group is to improve the understanding and modeling of boundary layers in the complex flow around water vehicles. As such, the focus is on incompressible, high-Reynolds-number flows that can be subject to non-equilibrium conditions such as strong pressure gradients, three-dimensionality, and surface roughness and heterogeneity. The Task Group has identified a reduced number of simpler problems in which the above conditions can be studied separately and in controlled environments. These include two-dimensional rough-wall boundary layers under both zero and non-zero pressure gradients, two-dimensional smooth-wall boundary layers subject to pressure gradients, and boundary layers around smooth bodies of revolution and three-dimensional obstacles. An experimental and computational data set is being assembled for further analysis and insight into the flow mechanisms involved, as well as the shortcomings of state-of-the-art models. This paper gives an outlook of the modeling effort within the Task Group, as well its different objectives. These include predicting the effect of roughness in equilibrium conditions; assessing the applicability and/or extension of equilibrium models and predictions to non-equilibrium conditions, in particular when outer-layer similarity is lost; the development of near-wall models based on a reduced-order resolvent framework; and the use of machine-aided methods in closure models.


Ricardo García-Mayoral

University of Cambridge

Paul Durbin

Iowa State University

Beverley McKeon

California Institute of Technology (Caltech)

Ugo Piomelli

Queen's University

Richard D. Sandberg

University of Melbourne

Daniel Chung

University of Melbourne

Nicholas Hutchins

University of Melbourne

Rickard Bensow

Chalmers, Mechanics and Maritime Sciences (M2), Marine Technology

Tobias Knopp

German Aerospace Center (DLR)

Andreas Krumbein

German Aerospace Center (DLR)

Christopher J. Roy

Virginia Polytechnic Institute and State University

Aldo Gargiulo

Virginia Polytechnic Institute and State University

K. Todd Lowe

Virginia Polytechnic Institute and State University

Serge L. Toxopeus

Maritime Research Institute Netherlands (MARIN)

AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2022

AIAA 2022-1033
9781624106316 (ISBN)

AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2022
San Diego, USA,

Subject Categories

Applied Mechanics

Vehicle Engineering

Fluid Mechanics and Acoustics



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2/1/2022 1