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3 edition of Time-accurate simulations of a shear layer forced at a single frequency found in the catalog.

Time-accurate simulations of a shear layer forced at a single frequency

Time-accurate simulations of a shear layer forced at a single frequency

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Published by National Aeronautics and Space Administration, For sale by the National Technical Information Service in [Washington, DC], [Springfield, Va .
Written in English

    Subjects:
  • Shear flow -- Mathematical models.

  • Edition Notes

    Other titlesTime accurate simulations of a shear layer forced at a single frequency.
    StatementR.W. Claus, P.G. Huang, and J.M. MacInnes.
    SeriesNASA technical memorandum -- 100836.
    ContributionsHuang, P. G., MacInnes, J. M., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL18032160M

    () Simulations of dissolution of spherical particles in laminar shear flow. Chemical Engineering Research and Des () Numerical study of molten magnesium convection in the apparatus for titanium by: Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF. Visit to get more information about this book, to buy it in print, or to download it as a free PDF.

      The frequency response needs to be above kHz to characterize flow instabilities and turbulent spots. High frequency measurement of 2nd mode instabilities have been successfully performed with Atomic Layer Thermopile (ALTP) sensor [2, 3] and survivability on probes and heat shields has been demonstrated in blowdown wind tunnels [4].   () Time-accurate intermediate boundary conditions for large eddy simulations based on projection methods. International Journal for Numerical Methods in Fluids , () Large eddy simulation of turbulent flows via domain decomposition by:

      The far-field noise was measured at 30\r{ } and 90\r{ } relative to the jet axis. Laser sheet flow visualization was also carried out. When the jet was forced at a low frequency, the noise level was increased at both measuring locations, but not as much as that in a Mach jet in our previous work. The high computational cost of CFD simulations can make it impractical to run large numbers of simulations at diverse flow conditions. The second part of this thesis introduces a method for performing generative modeling, which allows for the efficient simulation of fluid flows at a wide range of flow conditions given data from only a subset of.


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Time-accurate simulations of a shear layer forced at a single frequency Download PDF EPUB FB2

Time-Accurate Simulations of a Shear Layer Forced at a Single Frequency R.W. Claus Lewis Research Center Cleveland, Ohio P.G. Huang Michigan Technological University Houghton, Michigan and J. MacInnes Princeton University Princeton, New Jersey Prepared for the 26th Aerospace Sciences MeetingCited by: 3.

Get this from a library. Time-accurate simulations of a shear layer forced at a single frequency. [R W Claus; P G Huang; J M MacInnes; United States. National Aeronautics and. American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA Time-accurate simulations of a shear layer forced at a single frequency [microform] / R.W.

Claus, P.G. H Can institutional transition stimulate long-run growth. / Yiping Huang; Classifying objectively identified wind changes using synoptic pressure cycle phases / Huang Xinmei and Tax competition with involuntary unemployment / by Yophy Huang.

Time-accurate simulations of a shear layer forced at a single frequency. CLAUS, P. HUANG and; J. MACINNES; Forced internal unsteady aerodynamics. ERIC STEPHEN, JOHN WALKER, Increasing the frequency response of constant temperature hot-wire systems for use in supersonic flow.

The paper describes the effects of a forced harmonic oscillations of fixed frequency and amplitudes in the range Λ = Um/Ub = 1 / 11 on the characteristics of a turbulent pipe. Results indicate that at a Reynolds number of 60, the entire system comprised of the shear layer, the separation zone, and the wake is locked on to a single frequency.

The mixing layer is forced by a vibrating flap whose motion is described by superposition of sinusoidal functions of time with different forcing frequencies. The effect of multiple frequency forcing up to three frequencies on vortex merging in the mixing layer is studied numerically by a two-dimensional vortex method.

Engineering Turbulence Modelling and Experiments 6 Computations of a synthetic jet are performed with usual RANS-equations solved in a time-accurate mode instead of a single vortex ring or a single vortex tube. The plane shear layer is first formed between two parallel uniform propane-air mixture streams.

After an electric spark is. Detached Eddy Simulation of Supersonic Shear Layer Wake Flows H. L¨udeke, V. Togiti gion the flow is forced to turn along the axis of symmetry causing a reattachment shock to be an acceleration of time accurate calculations of 2nd up to 3rd order is possible.

Several one- and. Space-time correlation is a staple method for investigating the dynamic coupling of spatial and temporal scales of motion in turbulent flows. In this article, we review the space-time correlation models in both the Eulerian and Lagrangian frames of reference, which include the random sweeping and local straining models for isotropic and homogeneous turbulence, Taylor's Cited by: Balancing aspects of numerical dissipation, dispersion, and aliasing in time‐accurate simulations 6 May, The current work concerns the use of polynomial‐based aliasing limits for identifying a range of scales over which numerical dissipation, dispersion, and aliasing errors can be mitigated via proper scheme selection.

Based on the original unsteady simulation program, the transonic aircraft external store separation was simulated by structured chimera grid approach coupled with a six degree of freedom trajectory code.

The chimera grid utilized the hole-map cutting method; the searching efficiency was compared between the stencil walk and inverse map when building interpolation during Author: Ya Chao Di, Ge Gao, Jing Lei Xu, Xing Chen Shao, Qing Yang.

Simulations are first performed to investigate key modeling aspects that include the influence of CFD mesh resolution and topology (structured versus unstructured mesh), time-step size, and turbulence model (delayed-detached-eddy-simulation and k − ω shear stress transport-scale adaptive simulation).

Final FSI simulations are then performed Cited by: 1. In this paper we present results of delayed detached eddy simulation (DDES) and computational hydroacoustics (CHA) simulations of a marine propeller operating in a cavitation tunnel.

DDES is carried out in both wetted and cavitating conditions, and we perform the investigation at several propeller loadings. CHA analyses are done for one propeller loading both in wetted and Cited by: 6. In this paper, we conducted numerical simulations to investigate single and two-phase flows around marine propellers in open-water conditions at different Reynolds number regimes.

The simulations were carried out using a homogeneous compressible two-phase flow model with RANS and hybrid RANS/LES turbulence modeling approaches. Transition was accounted for Author: Ville Viitanen, Timo Siikonen, Antonio Sánchez-Caja.

Read Volume Issue 4 of J. Turbomach. Heat Transfer Committee Best Paper of Award: Distribution of Film-Cooling Effectiveness on a Turbine Endwall Measured Using the Ammonia and Diazo Technique. JimD and David Appell, This is the standard gloss that you repeat and its wrong.

“The simulation forgets about the initial conditions.” Philippe Spalart who knows vastly more than either of you says they now have LES time accurate simulations where the “climate” is different for different grid sizes.

That’s the issue. Numerical Simulations in Low–Prandtl Number Convection (J D Scheel, J Schumacher) Effect of Buoyancy on Turbulent Mixed Convection Flow Through Vertical and Horizontal Channels (N Satish, K Venkatasubbaiah, R Harish) Computation of Boundary Layer Flow over Porous Laminated Flat Plate (K A Nair, A Sameen, S A Lal).

Phase Averaged Wall Shear Stress, Wall Pressure and Near Wall Velocity Field Measurements in a Whirling Annular Seal Effect of Unsteady Wake Passing Frequency on Boundary Layer Transition, Experimental Investigation and Wavelet Analysis. Schobeiri, Numerical Simulations of Advanced Transonic Compressor Stages Using an Unsteady.

This banner text can have markup. web; books; video; audio; software; images; Toggle navigation.“An Analysis and Application of the Time-Dependent Turbulent Boundary-Layer Equations (Two Dimensional Compressible Turbulent Boundary Layer with Time Dependent Mean Velocity and Density Fields, Deriving Momentum and Kinetic Energy Integral Equations),” AIAA Journal, Vol.

9, Aug.pp. The modeling of turbulent flows is immensely important for a large variety of fluid flows of scientific and engineering interest. The technique of large eddy simulation (LES) is a promising avenue to offer highly detailed simulations of turbulence in a time-accurate manner without excessive averaging inherent in less detailed approaches.