THE EFFECTS OF NUMERICAL METHODS ON THE STATISTICAL COMPARISON BETWEEN EXPERIMENTS AND SIMULATIONS OF SHOCKED GAS CYLINDERS.

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Validation of numerical simulations, Le., the quantitative comparison of calculated results with experimental data, is an essential practice in computational fluid dynamics. These comparisons are particularly difficult in the field of shock-accelerated fluid mixing, which can be dominated by irregular structures induced by flow instabilities. Such flows exhibit non-deterministic behavior, which eliminates my direct way to establish correspondence between experimental data and numerical simulation. We examine the detailed structures of mixing experiments and their simulation for Richtmyer-Meshkov (RM) experiments of Prestridge et al., Tomkins et al., and Jacobs. Numerical simulations of these experiments will be performed with several different high-resolution ... continued below

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2 p.

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Rider, William; Kamm, J. R. (James R.); Tomkins, C. D. (Chris D.); Prestridge, K. P. (Katherine P.); Rightley, P. M. (Paul M.); Benjamin, R. F. (Robert F.) et al. January 1, 2001.

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Description

Validation of numerical simulations, Le., the quantitative comparison of calculated results with experimental data, is an essential practice in computational fluid dynamics. These comparisons are particularly difficult in the field of shock-accelerated fluid mixing, which can be dominated by irregular structures induced by flow instabilities. Such flows exhibit non-deterministic behavior, which eliminates my direct way to establish correspondence between experimental data and numerical simulation. We examine the detailed structures of mixing experiments and their simulation for Richtmyer-Meshkov (RM) experiments of Prestridge et al., Tomkins et al., and Jacobs. Numerical simulations of these experiments will be performed with several different high-resolution shock capturing schemes, including a variety of finite volume Godunov methods. We compare the experimental data for cOnfigurations of one and two diffuse cylinders of SF6 in air with numerical results using several multiscale metrics: fractal analysis, continuous wavelet transforms, and generalized correlations; these measures complement traditional metrics such as PDFs, mix fractions, and integral mixing widths.

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2 p.

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  • Submitted to the Second International Conference on Computational Fluid Dynamics, University of Sydney, Australia 15-19 July 2002.

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  • Report No.: LA-UR-01-6762
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 975905
  • Archival Resource Key: ark:/67531/metadc933467

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  • January 1, 2001

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  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 9, 2016, 11:24 p.m.

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Rider, William; Kamm, J. R. (James R.); Tomkins, C. D. (Chris D.); Prestridge, K. P. (Katherine P.); Rightley, P. M. (Paul M.); Benjamin, R. F. (Robert F.) et al. THE EFFECTS OF NUMERICAL METHODS ON THE STATISTICAL COMPARISON BETWEEN EXPERIMENTS AND SIMULATIONS OF SHOCKED GAS CYLINDERS., article, January 1, 2001; United States. (digital.library.unt.edu/ark:/67531/metadc933467/: accessed June 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.