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In what range should the observed order of grid convergence be?

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Old   March 9, 2010, 09:59
Default In what range should the observed order of grid convergence be?
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Jouke de Baar
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I've been reading Roache "Verification and Validation in Comp. Sc. and Eng." but haven't found an answer to the following question: What range is acceptable for the observed order of convergence?

For a 2nd order method it should be near 2.0, but how near?

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