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Theory and Modern Applications

Table 9 Rate of convergence \(r_{\varepsilon _{1},\varepsilon _{2}} ^{N,M}\) for Example 5.2 using the adaptive grid method with \(\varepsilon _{2}=10^{-2}\)

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

\(\varepsilon _{1}\)

Number of intervals N/time size Δt

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

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

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

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

10−3

0.6415

0.7725

0.8504

0.9132

10−4

0.6533

0.7888

0.8853

0.9870

10−5

0.5850

0.7950

0.7919

0.8498

10−6

0.5783

0.7454

0.8093

0.7973

10−7

0.6467

0.5915

0.7870

0.7360