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Theory and Modern Applications

Table 2 Rate of convergence \(r_{\varepsilon _{1},\varepsilon _{2}} ^{N,M}\) for Example 5.1 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

0.8482

0.9509

1.0555

0.8917

10−3

0.7423

0.8239

0.8942

0.9622

10−4

0.8278

0.7838

1.0034

1.0084

10−5

0.7075

0.8303

1.0270

0.8375

10−6

0.6146

0.9205

0.9064

0.9434

10−7

0.7879

0.9738

0.7456

0.8337