Work

Nonequilibrium wall model for large eddy simulations of complex flows exhibiting turbulent smooth body separation

Year: 2024

Type: article

Abstract: We propose a nonequilibrium wall model for improving the predictions of flow separation in complex, turbulent boundary layers. Improved predictability of smooth body separation at multiple Reynolds and Mach numbers in flows over the NASA/Boeing speed bump and the Bachalo-Johnson bumps is demonstrated at resolutions where the equilibrium model fails to separate. Scaling arguments, followed by $a$ $p\phantom{\rule{0}{0ex}}o\phantom{\rule{0}{0ex}}s\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}e\phantom{\rule{0}{0ex}}r\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}o\phantom{\rule{0}{0ex}}r\phantom{\rule{0}{0ex}}i$ verification suggest a weaker scaling of the required resolutions to capture flow separation using the proposed model compared to standard equilibrium closures.

Source: Physical Review Fluids

DOI: 10.1103/physrevfluids.9.124603

Authors: Rahul Agrawal, Sanjeeb T. Bose, Parviz Moin

Institutions: Stanford University, Cadence Design Systems (United States)

Language: English

Topic: Fluid Dynamics and Turbulent Flows

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Energy, National Aeronautics and Space Administration, Nuclear Safety and Security Commission, Office of Science