A Stochastic Backscatter Model for Grey-Area Mitigation in Detached Eddy Simulations

被引：9
作者：
Kok, Johan C. [1 ]
机构：
[1] Netherlands Aerosp Ctr NLR, Anthony Fokkerweg 2, NL-1059 CM Amsterdam, Netherlands
来源：
FLOW TURBULENCE AND COMBUSTION | 2017年 / 99卷 / 01期
关键词：
Detached eddy simulation; Free shear layers; Subgrid-scale model; Stochastic backscatter model; Grey-area mitigation; NOISE-REDUCTION; TURBULENCE; FLOW;
D O I：
10.1007/s10494-017-9809-y
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A new stochastic backscatter model is proposed for detached eddy simulations that accelerates the development of resolved turbulence in free shear layers. As a result, the model significantly reduces so-called grey areas in which resolved turbulence is lacking after the computation has switched from a Reynolds-averaged Navier-Stokes simulation to a large eddy simulation. The new stochastic model adds stochastic forcing to the momentum equations with a rate of backscatter from the subgrid to the resolved scales that is consistent with theory. The effectiveness of the stochastic model is enhanced by including spatial and temporal correlations of the stochastic forcing for scales smaller than the cut-off scale. The grey-area mitigation is demonstrated for two canonical test cases: the plane free shear layer and the round jet.
引用
收藏
页码：119 / 150
页数：32
相关论文
共 45 条
  • [21] Resolving the dependence on freestream values for the k-ω turbulence model
    Kok, JC
    [J]. AIAA JOURNAL, 2000, 38 (07) : 1292 - 1295
  • [22] KOK JC, 2004, 42 AIAA AER SCI M RE
  • [23] MEASUREMENTS IN SUBSONIC AND SUPERSONIC FREE JETS USING A LASER VELOCIMETER
    LAU, JC
    MORRIS, PJ
    FISHER, MJ
    [J]. JOURNAL OF FLUID MECHANICS, 1979, 93 (JUL) : 1 - 27
  • [24] EFFECTS OF EXIT MACH NUMBER AND TEMPERATURE ON MEAN-FLOW AND TURBULENCE CHARACTERISTICS IN ROUND JETS
    LAU, JC
    [J]. JOURNAL OF FLUID MECHANICS, 1981, 105 (APR) : 193 - 218
  • [25] STOCHASTIC BACKSCATTER IN A SUBGRID-SCALE MODEL - PLANE SHEAR MIXING LAYER
    LEITH, CE
    [J]. PHYSICS OF FLUIDS A-FLUID DYNAMICS, 1990, 2 (03): : 297 - 299
  • [26] Lesieur M, 1996, ANNU REV FLUID MECH, V28, P45
  • [27] Shear-improved Smagorinsky model for large-eddy simulation of wall-bounded turbulent flows
    Leveque, E.
    Toschi, F.
    Shao, L.
    Bertoglio, J. -P.
    [J]. JOURNAL OF FLUID MECHANICS, 2007, 570 : 491 - 502
  • [28] Mockett C., 2015, Progress in Hybrid RANS-LES Modelling, P187, DOI [10.1007/978-3-319-15141-0, DOI 10.1007/978-3-319-15141-0]
  • [29] Subgrid-scale stress modelling based on the square of the velocity gradient tensor
    Nicoud, F
    Ducros, F
    [J]. FLOW TURBULENCE AND COMBUSTION, 1999, 62 (03) : 183 - 200
  • [30] Using singular values to build a subgrid-scale model for large eddy simulations
    Nicoud, Franck
    Toda, Hubert Baya
    Cabrit, Olivier
    Bose, Sanjeeb
    Lee, Jungil
    [J]. PHYSICS OF FLUIDS, 2011, 23 (08)
12345