33
IRUS Total
Downloads

Synthetic turbulence generation for high-order scale-resolving simulations on unstructured grids

File Description SizeFormat 
syntethic_turb_source_SEM.pdfAccepted version13.54 MBAdobe PDFView/Open
Title: Synthetic turbulence generation for high-order scale-resolving simulations on unstructured grids
Authors: Giangaspero, G
Witherden, F
Vincent, P
Item Type: Journal Article
Abstract: An extended version of the synthetic eddy method for generation of synthetic turbulence has been developed via a source term formulation and implemented in the open-source cross-platform solver PyFR. The method caters for the full space-dependent anisotropy of the target turbulent length scales, and it is agnostic of the space and time discretization of the underlying solver, which can be incompressible or compressible. Moreover, the method does not require each solution point to communicate with nearest neighbors; thus, it is well suited for modern, massively parallel, high-order unstructured codes which support mixed and possibly curved elements. The method has been applied to two test cases: incompressible plane channel flow at Reτ 180 and compressible flow over an SD7003 aerofoil at Re 66;000, Ma 0.2, and α 4 deg. The channel flow case was run on three topologically different meshes composed of hexahedra, prisms, and a combination of prisms and tetrahedra, respectively. Almost identical results have been obtained on the three meshes. Results also show that taking into account the anisotropy of the turbulent length scales can reduce the development length. For the SD7003 aerofoil case, the injection of synthetic turbulence improves agreement between numerical and experimental results.
Issue Date: 1-Feb-2022
Date of Acceptance: 21-Aug-2021
URI: http://hdl.handle.net/10044/1/92903
DOI: 10.2514/1.J061046
ISSN: 0001-1452
Publisher: American Institute of Aeronautics and Astronautics
Start Page: 1032
End Page: 1051
Journal / Book Title: AIAA Journal: devoted to aerospace research and development
Volume: 60
Issue: 2
Copyright Statement: Copyright © 2021 by the authors. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. All requests for copying and permission to reprint should be submitted to CCC at www.copyright.com; employ the eISSN 1533-385X to initiate your request. See also AIAA Rights and Permissions www.aiaa.org/randp
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: EP/R030340/1
Keywords: Science & Technology
Technology
Engineering, Aerospace
Engineering
Isotropic Turbulence
Unstructured Grid
Incompressible Flow
Aerofoil
Boundary Layer Transition
Direct Numerical Simulation
Reynolds Averaged Navier Stokes
Power Spectral Density
Finite Element Scheme
Kinematic Viscosity
DIRECT NUMERICAL-SIMULATION
LAMINAR SEPARATION-BUBBLES
LARGE-EDDY SIMULATIONS
INFLOW CONDITIONS
CHANNEL FLOW
BOUNDARY-LAYER
Science & Technology
Technology
Engineering, Aerospace
Engineering
Isotropic Turbulence
Unstructured Grid
Incompressible Flow
Aerofoil
Boundary Layer Transition
Direct Numerical Simulation
Reynolds Averaged Navier Stokes
Power Spectral Density
Finite Element Scheme
Kinematic Viscosity
DIRECT NUMERICAL-SIMULATION
LAMINAR SEPARATION-BUBBLES
LARGE-EDDY SIMULATIONS
INFLOW CONDITIONS
CHANNEL FLOW
BOUNDARY-LAYER
Aerospace & Aeronautics
0901 Aerospace Engineering
0905 Civil Engineering
0913 Mechanical Engineering
Publication Status: Published
Online Publication Date: 2021-11-05
Appears in Collections:Aeronautics
Faculty of Engineering