Nonuniform mesh with the numerical method of characteristics

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Discussion Overview

The discussion revolves around the use of a nonuniform mesh in the numerical method of characteristics, specifically in the context of computational fluid dynamics. Participants seek resources and share insights on implementing coarse and fine spatial meshes in their coding practices.

Discussion Character

  • Exploratory, Technical explanation, Homework-related

Main Points Raised

  • Kate requests recommendations for literature on using coarse and fine spatial meshes with the numerical method of characteristics.
  • One participant suggests two books, "Modern Compressible Flow" by John D. Anderson and "Gas Dynamics" by James E.A. John and Theo G. Keith, as useful resources.
  • Kate mentions she is using Matlab and expresses uncertainty about how to adjust the fine mesh as the characteristics move.
  • A participant emphasizes the importance of calculating actual points in characteristic codes, explaining the transition from a rectangular grid to a characteristic mesh and then to an approximate rectangular mesh.
  • Another participant expresses interest in reviewing Kate's code once it is completed.

Areas of Agreement / Disagreement

The discussion does not appear to reach a consensus, as participants share different aspects of the topic without resolving the uncertainties regarding the implementation of the mesh adjustments.

Contextual Notes

Participants have not clarified specific assumptions about the characteristics mesh or the conditions under which the fine mesh should be adjusted, leaving some aspects of the discussion unresolved.

Who May Find This Useful

This discussion may be useful for individuals interested in computational fluid dynamics, particularly those working with the numerical method of characteristics and mesh generation techniques.

kobjob
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Could someone please direct me to a good book/article that describes how to use a coarse and fine spatial mesh with the numerical method of characteristics?
Thank you.
Kate
 
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The book Modern Compressible Flow: With Historical Perspective by John D. Anderson is good as well as Gas Dynamics by James E.A. John and Theo G. Keith.

What are you using to write your code? Fortran, matlab?
 
Thanks for your suggestions!

I'm using Matlab. I'm not sure how/if I should be moving the fine mesh as the characteristics move.

Thanks again,
Kate
 
The main thing with characteristics codes is calculating the actual points. You have a normal rectangular grid to begin with and then you have you characteristic mesh and you have to go from you characteristics mesh (where the values are exact) to your rectangular mesh where the values become approximate.

I wouldn't mind having a peek at your code when you're done.
 

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