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spectral radius R

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Old   August 6, 2006, 02:33
Default spectral radius R
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wxm
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How is estimated the spectral radius in 3 dimensions? In 2 dimensions in the TVD scheme it is usual:

R=abs(dely*u-delx*v)+speed of sound*sqrt(delx**2+dely**2)

Thanks for any advice.

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