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Theory and Modern Applications

Table 7 Rate of convergence \(r_{\varepsilon _{1},\varepsilon _{2}} ^{N,M}\) for Example 5.2 using the adaptive grid method with \(\varepsilon _{1}=10^{-2}\)

From: Parameter uniform numerical method for a system of two coupled singularly perturbed parabolic convection-diffusion equations

\(\varepsilon _{2}\)

Number of intervals N/time size Δt

\(32/\frac{1}{20}\)

\(64/\frac{1}{40}\)

\(128/\frac{1}{80}\)

\(256/\frac{1}{160}\)

10−2

0.6567

0.7866

0.8619

0.9471

10−3

0.6927

0.7566

0.8428

0.9109

10−4

0.7062

0.7981

0.8949

0.9913

10−5

0.6289

0.8009

0.8017

0.7629

10−6

0.6168

0.7484

0.8355

0.7946

10−7

0.6718

0.6448

0.7960

0.6836