DNS of a spatially developing turbulent mixing layer from co-flowing laminar boundary layers

Juan D. Colmenares F, Svetlana V. Poroseva, Yulia Peet, Scott M. Murman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Understanding the development of a turbulent mixing layer is essential for various aerospace applications. In particular, experiments found that the flow development is highly sensitive to inflow conditions, which are difficult to reproduce in the flow simulations. In previous direct numerical simulations (DNS) of temporarily and spatially developing turbulent mixing layers, idealized inflow conditions based on mathematical approximations of the mean velocity profile were used to facilitate turbulent flow conditions. The current paper presents results of DNS of a spatially developing turbulent mixing layer, where co-flowing laminar boundary layers over a splitter plate are used as inflow conditions; no artificial perturbations are seeded into the flow. The goal is to closer replicate a naturally developing mixing layer. The flow conditions used in simulations closely match those in experiments by Bell & Mehta (1990). DNS were conducted using the spectral-element code Nek5000. Effects of the splitter plate thickness and the computational domain size in the spanwise direction on the flow development are analyzed. Profiles of the mean flow velocity and the Reynolds stresses are compared with the experimental data.

Original languageEnglish (US)
Title of host publication47th AIAA Fluid Dynamics Conference, 2017
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105005
StatePublished - 2017
Event47th AIAA Fluid Dynamics Conference, 2017 - Denver, United States
Duration: Jun 5 2017Jun 9 2017

Other

Other47th AIAA Fluid Dynamics Conference, 2017
CountryUnited States
CityDenver
Period6/5/176/9/17

ASJC Scopus subject areas

  • Aerospace Engineering
  • Engineering (miscellaneous)

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  • Cite this

    Colmenares F, J. D., Poroseva, S. V., Peet, Y., & Murman, S. M. (2017). DNS of a spatially developing turbulent mixing layer from co-flowing laminar boundary layers. In 47th AIAA Fluid Dynamics Conference, 2017 American Institute of Aeronautics and Astronautics Inc, AIAA.