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Why do residuals increase

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Old   October 2, 2007, 22:05
Default Why do residuals increase
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jrg
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For most problems, whenever the solver settings are changed, the residuals would shoot up but rapidly decrease before stabilizing at convergence. What does it mean if the rapid decrease is followed by a very very slow increase with respect to the number of iterations?
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Old   October 3, 2007, 17:59
Default Re: Why do residuals increase
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red lemon
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divergence
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Old   October 3, 2007, 18:35
Default Re: Why do residuals increase
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jrg
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shouldn't divergence be rapid wrt iterations?
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Old   October 4, 2007, 17:43
Default Re: Why do residuals increase
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red lemon
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no can be gradual esp if low urf's
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