Analysis of uncertainty sources in DNS of a turbulent mixing layer using Nek5000

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

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

Abstract

Understanding spatial development of a turbulent mixing layer is essential for various aerospace applications. However, multiple factors affect physics of this flow, making it difficult to reproduce results of experiments in simulations. The current study investigates sensitivity of direct numerical simulation (DNS) of such a flow to computational parameters. In particular, effects of a time step in a temporal discretization scheme, dimensions of the computational domain, and the laminar boundary layer characteristics at the splitter plate trailing edge are considered. Flow conditions used in DNS are close to those from the experiments by Bell & Mehta (1990), where untripped boundary layers co-flowing on both sides of a splitter plate mix downstream the plate. No artificial perturbations are used in simulations to trigger the flow transition to turbulence. DNS are conducted using the spectral-element code Nek5000.

Original languageEnglish (US)
Title of host publication2018 Fluid Dynamics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105531
DOIs
StatePublished - Jan 1 2018
Event48th AIAA Fluid Dynamics Conference, 2018 - Atlanta, United States
Duration: Jun 25 2018Jun 29 2018

Other

Other48th AIAA Fluid Dynamics Conference, 2018
CountryUnited States
CityAtlanta
Period6/25/186/29/18

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ASJC Scopus subject areas

  • Aerospace Engineering
  • Engineering (miscellaneous)

Cite this

Colmenares F., J. D., Poroseva, S. V., Peet, Y., & Murman, S. M. (2018). Analysis of uncertainty sources in DNS of a turbulent mixing layer using Nek5000. In 2018 Fluid Dynamics Conference [AIAA 2018-3226] American Institute of Aeronautics and Astronautics Inc, AIAA. https://doi.org/10.2514/6.2018-3226