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 language | English (US) |
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Title of host publication | 47th AIAA Fluid Dynamics Conference, 2017 |
Publisher | American Institute of Aeronautics and Astronautics Inc, AIAA |
ISBN (Print) | 9781624105005 |
State | Published - 2017 |
Event | 47th AIAA Fluid Dynamics Conference, 2017 - Denver, United States Duration: Jun 5 2017 → Jun 9 2017 |
Other
Other | 47th AIAA Fluid Dynamics Conference, 2017 |
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Country/Territory | United States |
City | Denver |
Period | 6/5/17 → 6/9/17 |
ASJC Scopus subject areas
- Aerospace Engineering
- Engineering (miscellaneous)