A high-resolution code for large eddy simulation of incompressible turbulent boundary layer flows
KAUST DepartmentMechanical Engineering Program
Physical Sciences and Engineering (PSE) Division
Clean Combustion Research Center
Fluid and Plasma Simulation Group (FPS)
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AbstractWe describe a framework for large eddy simulation (LES) of incompressible turbulent boundary layers over a flat plate. This framework uses a fractional-step method with fourth-order finite difference on a staggered mesh. We present several laminar examples to establish the fourth-order accuracy and energy conservation property of the code. Furthermore, we implement a recycling method to generate turbulent inflow. We use the stretched spiral vortex subgrid-scale model and virtual wall model to simulate the turbulent boundary layer flow. We find that the case with Reθ ≈ 2.5 × 105 agrees well with available experimental measurements of wall friction, streamwise velocity profiles and turbulent intensities. We demonstrate that for cases with extremely large Reynolds numbers (Reθ = 1012), the present LES can reasonably predict the flow with a coarse mesh. The parallel implementation of the LES code demonstrates reasonable scaling on O(103) cores. © 2013 Elsevier Ltd.
SponsorsThis work was funded by KAUST. We gratefully acknowledge the use of Shaheen supercomputer to perform the simulations reported in this paper.
JournalComputers & Fluids