LAUSR.org creates dashboard-style pages of related content for over 1.5 million academic articles. Sign Up to like articles & get recommendations!

Lagrangian transport equations and an iterative solution method for turbulent jet flows

Photo by curioso from unsplash

Abstract Turbulent jet flows exhibit Kelvin–Helmholtz type of instabilities at its onset. Using a Galilean transform, the Navier–Stokes equation leads to an explicit, solvable expression for the Reynolds stress gradient,… Click to show full abstract

Abstract Turbulent jet flows exhibit Kelvin–Helmholtz type of instabilities at its onset. Using a Galilean transform, the Navier–Stokes equation leads to an explicit, solvable expression for the Reynolds stress gradient, which is verified through comparison with DNS (direct numerical simulation) and experimental data for canonical flows. The Reynolds stress budget shows that the momentum balance of u’ 2 , pressure, and viscous forces forms a triad of forces to generate the Reynolds stress. For jet flows, an additional Lagrangian transport equation for u’ 2 , also confirmed using data, constitutes a closure method, which is demonstrated and compared with experimental data and turbulence models. Similar approach is being tested in other turbulent flows.

Keywords: turbulent jet; jet; lagrangian transport; jet flows

Journal Title: Physica D: Nonlinear Phenomena
Year Published: 2020

Link to full text (if available)


Share on Social Media:                               Sign Up to like & get
recommendations!

Related content

More Information              News              Social Media              Video              Recommended



                Click one of the above tabs to view related content.