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For a scheme modelled using the DWF method, the diagonal coefficient becomes zero when ___________

For a scheme modelled using the DWF method, the diagonal coefficient becomes zero when ___________ Correct Answer DWFf > 0.5

For values of DWFf larger than 0.5, results in a system with negative diagonal coefficients. So, the system becomes unsolvable by iterative methods. This happens whenever Φf > 0.5(Φc+Φd).

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