Variable High Order Multiblock Overlapping Grid Methods for Mixed Steady and Unsteady Multiscale Viscous Flows

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Flows containing steady or nearly steady strong shocks in parts of the flow field, and unsteady turbulence with shocklets on other parts of the flow field are difficult to capture accurately and efficiently employing the same numerical scheme even under the multiblock grid or adaptive grid refinement framework. On one hand, sixth-order or higher shock-capturing methods are appropriate for unsteady turbulence with shocklets. On the other hand, lower order shock-capturing methods are more effective for strong steady shocks in terms of convergence. In order to minimize the shortcomings of low order and high order shock-capturing schemes for the subject flows, ... continued below

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Sjogreen, B & Yee, H C December 12, 2007.

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Flows containing steady or nearly steady strong shocks in parts of the flow field, and unsteady turbulence with shocklets on other parts of the flow field are difficult to capture accurately and efficiently employing the same numerical scheme even under the multiblock grid or adaptive grid refinement framework. On one hand, sixth-order or higher shock-capturing methods are appropriate for unsteady turbulence with shocklets. On the other hand, lower order shock-capturing methods are more effective for strong steady shocks in terms of convergence. In order to minimize the shortcomings of low order and high order shock-capturing schemes for the subject flows, a multi-block overlapping grid with different orders of accuracy on different blocks is proposed. Test cases to illustrate the performance of the new solver are included.

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PDF-file: 20 pages; size: 0.8 Mbytes

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  • Presented at: International Conference on Spectral and High Order Methods, Beijing, China, Jun 18 - Jun 22, 2007

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  • Report No.: UCRL-PROC-237301
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 923993
  • Archival Resource Key: ark:/67531/metadc895733

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  • December 12, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Dec. 2, 2016, 6:08 p.m.

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Sjogreen, B & Yee, H C. Variable High Order Multiblock Overlapping Grid Methods for Mixed Steady and Unsteady Multiscale Viscous Flows, article, December 12, 2007; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc895733/: accessed December 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.