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3 edition of On prediction of equilibrium states in homogeneous compressible turbulence found in the catalog.

On prediction of equilibrium states in homogeneous compressible turbulence

On prediction of equilibrium states in homogeneous compressible turbulence

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  • 32 Currently reading

Published by National Aeronautics and Space Administration, Langley Research Center, National Technical Information Service in Hampton, Va, [Springfield, Va .
Written in English

    Subjects:
  • Turbulence.

  • Edition Notes

    StatementRidha Abid.
    SeriesNASA contractor report -- 4570., NASA contractor report -- NASA CR-4570.
    ContributionsLangley Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL14707372M

    Homogeneous Turbulence Dynamics Pierre Sagaut, Claude Cambon This book provides state-of-the-art results and theories in homogeneous turbulence, including anisotropy and compressibility effects with extension to quantum turbulence, magneto-hydodynamic turbulence and turbulence in non-newtonian fluids. @article{osti_, title = {Rapid distortion analysis of high speed homogeneous turbulence subject to periodic shear}, author = {Bertsch, Rebecca L. and Girimaji, Sharath S.}, abstractNote = {The effect of unsteady shear forcing on small perturbation growth in compressible flow is investigated. In particular, flow-thermodynamic field interaction and the resulting effect on the phase-lag.

      Partially Averaged Navier-Stokes Method for Turbulence: Fixed Point Analysis and Comparison With Unsteady Partially Averaged Navier-Stokes On the Prediction of Equilibrium States in Homogeneous Turbulence,” J. Fluid Mech. Predicting Equilibrium States With Reynolds Stress Closures in a Channel Flow and Homogeneous Shear Flow,” Phys.   Predicting equilibrium states with Reynolds stress closures in channel flow and Speziale, C. G. & Mac Giolla Mhuiris, N. a On the prediction of equilibrium states in homogeneous turbulence. J. Fluid Mech. , The pressure–dilatation correlation in compressible flows. Physics of Fluids A: Fluid Dynamics, Vol. 4, Issue. 12, p.

      Modeling the effect of upstream temperature fluctuations on shock/homogeneous turbulence interaction. Physics of Fluids, Vol. 21, No. 2 Bursting Frequency Predictions for Compressible Turbulent Boundary Layers. Evaluation of six k-ε turbulence model predictions of flow in a continuous casting billet-mold water model using laser doppler. A low-Reynolds number extension of the explicit algebraic stress model, developed by Gatski and Speziale (GS) is proposed. The turbulence anisotropy Π b and production to dissipation ratio P ∕ ϵ are modeled that recover the established equilibrium values for the homogeneous shear flows. The devised (⁠ Π b ⁠, P ∕ ϵ ⁠) combined with the model coefficients prevent the occurrence of.


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On prediction of equilibrium states in homogeneous compressible turbulence Download PDF EPUB FB2

Equilibrium states for each turbulence model are obtained numerically. A comparison of the predictions of the models with the DNS data will be made in the next section. where F has been defined previously in Eq. (18b). Calculations of compressible, homogeneous shear flows show that the Reynolds stresses.

Get this from a library. On prediction of equilibrium states in homogeneous compressible turbulence. [Ridha Abid; Langley Research Center.]. Equilibrium states of homogeneous compressible turbulence subjected to rapid shear is studied using rapid distortion theory (RDT).

The purpose of this study is to determine the numerical solutions. Equilibrium states of homogeneous compressible turbulence subjected to rapid shear is studied using rapid distortion theory (RDT).

The purpose of this study is to determine the numerical solutions of unsteady linearized equations governing double correlations spectra evolution. In this work, RDT code developed by authors solves these equations for compressible homogeneous Cited by: 2. The studies involving homogeneous turbulence and shocks have inherently focused on the fundamental aspects of compressible turbulence dynamics, whereas the studies involving inhomogeneous turbulent flows and shocks have additionally focused on flow prediction and subsequent control.

Direct numerical simulations of compressible, homogeneous, turbulent shear flows are used to evaluate Reynolds stress models. Three pressure-strain models, which are either linear, quadratic, or cubic in the anisotropy tensor are considered.

Dilatational dissipation and pressure-strain correlation models do not correctly capture the compressibility effects seen in the direct by: 2. approach to equilibrium turbulence for buoyant shear flow is much more complicated.

Even the parameters that characterize the equilibrium states are to date not known precisely. During last years, Gerz et al. [14] were interested in the study of the direct digital simulations [] for a homogeneous turbulence submitted to a vertical shear.

In fact, equilibrium states of several benchmark homogeneous shear flows have been used in the development and analysis of turbulence models (Speziale et al.,Abid and Speziale, ). In recent years, research has been focused on the study of. The ability of the models to predict both time evolving elds and equilibrium states is systematically tested.

Consistent with earlier studies, it is found that the addition of simple dilatational models allows for the prediction of the reduced growth rate of turbulent kinetic energy in compressible homogeneous. Speziale and N.

Mac Giolla Mhuiris, On the prediction of equilibrium states in homogeneous turbulence, J. Fluid Mech. – (). MathSciNet zbMATH CrossRef Google Scholar [7].

Recent DNS (Direct Numerical Simulation) results indicate that the main compressibility effect in turbulence comes from the reduced pressure-strain term due to reduced pressure fluctuations. In our previous work, using the concept of moving equilibrium in compressible homogeneous shear flow, we developed a compressible pressure-strain model by modifying an incompressible linear pressure.

Turbulent channel flow and homogeneous shear flow have served as basic building block flows for the testing and calibration of Reynolds stress models. In this paper, a direct theoretical connection is made between homogeneous shear flow in equilibrium and the log layer of fully developed turbulent channel flow.

It is shown that if a second‐order closure model of the standard type is. This book provides state-of-the-art results and theories in homogeneous turbulence, including anisotropy and compressibility effects with extension to quantum turbulence, magneto-hydodynamic.

The effects of turbulence modeling on the prediction of equilibrium states of turbulent buoyant shear flows were investigated. The velocity field models used include a two-equation closure, a. The results of compressible isotropic turbulence and compressible shear turbulence are compared and discussed for three bulk to shear viscosity ratios, i.e., μ b / μ = 0, 10, and The compensated spectrum of the velocity component shows that a better M t 4 scaling is obtained with a higher bulk to shear viscosity ratio.

The aim of this work is to compare the prediction of several second order models in a thermal field of two cases of homogeneous turbulence. The second order models retained for this work are the classic models of Launder, Reece and Rodi [J.

Fluid Mech. 68 () –], and the elaborate one of Launder et al. [Accomodating the effects of high strain rates in the modeling the. the equilibrium states of homogeneous buoyant turbulence to be determined (Zhao et al. This process does not yield the required relationships between the equilibrium state variables that are necessary for an optimization of the choice of closure coefficients of buoyant turbulence.

With so many equilibrium state variables. Compressibility, Turbulence and High Speed Flow introduces the reader to the field of compressible turbulence and compressible turbulent flows across a broad speed range, through a unique complimentary treatment of both the theoretical foundations and the measurement and analysis tools currently used.

The book provides the reader with the necessary background and current trends in. Note that this code resolves the full Navier–Stokes equations for nonlinear and non-isentropic compressible turbulence. Yu and Girimaji have extended RDT to study ideal-gas compressible turbulence submitted to mean velocity gradient.

However, these authors have added the state equation to the governing equations of mass, momentum and energy. +--equation is not important in the prediction of the equilibrium states of pure shear flows, would the same conclusion be true lbr the g,-equation for buoyant shear flows.

In view of this, there is a need to explore the ability of commonly used turbulence models to predict the equilibrium states. non-equilibrium effects, the present study provides a systematic analysis of a hierarchy of turbulence models over a range of relevant strain rate conditions in ICEs and RCMs.

Idealized mathematical models are used here to represent the straining in ICEs and RCMs, and the flow during the compression phase is treated as homogeneous; that is.“Investigation of the pressure-strain correlation in compressible homogeneous turbulent shear flow,” Transitional and turbulent compressible flows, Proceedings of the ASME Fluids Engineering Conference, Washington DC June, FED-Vol.pp.

–  On the Prediction of Equilibrium States in Homogeneous Turbulence,” Prediction of Time-Mean Characteristics and Periodical Fluctuations of Velocity and Thermal Fields of a Backward-Facing Step,” A Combined Large-Eddy Simulation and Time-Dependent RANS Capability for High-Speed Compressible Flow,”.