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Residual Convergence Analyzer

Estimate orders dropped, average convergence rate, and remaining iterations from initial, current, and target residuals.

visual calculatorNumerics & Stability

Read the flow shape before trusting the number.

This page turns a CFD setup into regime, scale, and dominant-effect cues. Adjust the calculator below and compare the moving graphic with the computed result.

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input scale
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model
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check
residualconvergencesolvermonitoring
formula
KaTeX rendered
orders = log10(R0/R)eta = log10(R/R_target) / (orders / N)\begin{aligned}\text{orders = log10(R0/R)}\\[0.35em]\text{eta = log10(R/R\_target) / (orders / N)}\end{aligned}
ASCII sourceorders = log10(R0/R), eta = log10(R/R_target) / (orders / N)
1e+01e-21e-41e-61e-81e-101e-120119237356474Residual drop forecasttarget residualcurrentiterationresidual
orders dropped
3.6990
orders / iter
0.010568
ETA iterations
124
status
converging

Residuals are not the only convergence criterion. Pair this trend check with force, mass-balance, and probe-history monitors.