High-Resolution Modeling of Multiscale Transient Phenomena in Turbulent Boundary Layers

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High fidelity numerical simulation of wall-bounded turbulence requires physically sound representation of the small scale unsteady processes governing near-wall momentum, heat, and mass transfer. Conventional wall treatments do not capture the diverse multiphysics flow regimes relevant to engineering applications. To obtain a robust yet computationally affordable near-wall submodel for turbulent flow computations, the fine-grained spatial structure and time evolution of the near-wall flow is simulated using a model formulated on a 1D domain corresponding to the wall-normal direction. This approach captures the strong variation of flow properties in the wall-normal direction and the transient interactions between this highly inhomogeneous region ... continued below

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94 pages

Creation Information

Kerstein, Alan R.; Schmidt, Rodney C.; Wunsch, Scott; Ashurst, William T.; Nilsen, Vebjorn & Dreeben, Thomas D. January 1, 2001.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

High fidelity numerical simulation of wall-bounded turbulence requires physically sound representation of the small scale unsteady processes governing near-wall momentum, heat, and mass transfer. Conventional wall treatments do not capture the diverse multiphysics flow regimes relevant to engineering applications. To obtain a robust yet computationally affordable near-wall submodel for turbulent flow computations, the fine-grained spatial structure and time evolution of the near-wall flow is simulated using a model formulated on a 1D domain corresponding to the wall-normal direction. This approach captures the strong variation of flow properties in the wall-normal direction and the transient interactions between this highly inhomogeneous region and the more nearly homogeneous (at fine scales) flow farther from the wall. The 1D simulation utilizes the One Dimensional Turbulence (ODT) methodology, whose formulation for the present application is described in detail. Demonstrations of ODT performance with regard to aspects of flow physics relevant to near-wall flow modeling are presented. The coupling of ODT to a large eddy simulation (LES) of confined turbulent flow is described, and the performance of the coupled formulation is demonstrated. It is concluded that this formulation has the potential to provide the fidelity needed for engineering applications at an affordable computational cost.

Physical Description

94 pages

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  • Other Information: PBD: 1 Jan 2001

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  • Report No.: SAND2001-8108
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/781975 | External Link
  • Office of Scientific & Technical Information Report Number: 781975
  • Archival Resource Key: ark:/67531/metadc718830

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  • January 1, 2001

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

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  • April 12, 2016, 2:16 p.m.

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Kerstein, Alan R.; Schmidt, Rodney C.; Wunsch, Scott; Ashurst, William T.; Nilsen, Vebjorn & Dreeben, Thomas D. High-Resolution Modeling of Multiscale Transient Phenomena in Turbulent Boundary Layers, report, January 1, 2001; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc718830/: accessed April 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.