TY - GEN
T1 - Analysis of uncertainty sources in DNS of a turbulent mixing layer using Nek5000
AU - Colmenares F., Juan D.
AU - Poroseva, Svetlana V.
AU - Peet, Yulia
AU - Murman, Scott M.
N1 - Funding Information:
Resources supporting this work were provided by the NASA High-End Computing (HEC) Program through the NASA Advanced Supercomputing (NAS) Division at Ames Research Center. Flow visualization using FieldView software was possible thanks to Intelligent Light who provided an academic license. Dr. S. V. Poroseva acknowledges partial support from the DTRA Grant HDTRA1-18-1-0022.
Publisher Copyright:
© 2018, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
PY - 2018
Y1 - 2018
N2 - 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.
AB - 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.
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U2 - 10.2514/6.2018-3226
DO - 10.2514/6.2018-3226
M3 - Conference contribution
AN - SCOPUS:85051292647
SN - 9781624105531
T3 - 2018 Fluid Dynamics Conference
BT - 2018 Fluid Dynamics Conference
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - 48th AIAA Fluid Dynamics Conference, 2018
Y2 - 25 June 2018 through 29 June 2018
ER -