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Old   September 23, 2008, 21:59
Default TVD grid resolution
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Shuo
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Hi

From what I have read it appears the simulations using TVD method have relatively coarsely meshes. From my personal experiences, the finer mesh the more problems i encounter with boundary conditions and 'streaklines'. Why is this so?

Shuo

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Old   September 24, 2008, 16:52
Default Re: TVD grid resolution
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meda
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you use TVD methods in coarse meshes because you cant see much differences between discretization schemes in fine meshes. as you may know, even FOU works good enough in a fine grid. the main idea to develop TVD is to achieve high resolution in coarse grids.
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Old   September 24, 2008, 17:56
Default Re: TVD grid resolution
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shuo
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Sorry what does FOU stand for? ALso could you please provide me with some references on grid resolution and TVD methods.

Thanks Shuo
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Old   September 25, 2008, 15:40
Default Re: TVD grid resolution
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and
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FOU= First Order Upwind unfortunately I dont remember any reference on grid resolution. good luck
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Old   September 25, 2008, 18:12
Default Re: TVD grid resolution
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shuo
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My personal experience shows that fine grids introduce instabilities and reflections from the 'non-reflecting B.C.'
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