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Theory and Modern Applications

Table 3 Accuracies in solution values with uniform meshes in Example 5.3

From: A fourth-order accurate quasi-variable mesh compact finite-difference scheme for two-space dimensional convection-diffusion problems

L  + 1

\(\boldsymbol {\tilde{\alpha}}\)

\(\boldsymbol {\tilde{\beta}}\)

\(\boldsymbol {\mathcal{E}_{\infty}}\)

\(\boldsymbol {\mathcal{E}_{2}}\)

\(\boldsymbol {\Theta_{\infty}}\)

\(\boldsymbol {\Theta_{2}}\)

\(R_{e} =1\)

      

4

0

0

4.15e+01

2.32e+01

–

–

8

0

0

3.63e+01

1.78e+01

0.1

0.3

16

0

0

6.10e−01

2.66e−01

5.9

6.1

\(R_{e} =10\)

      

4

0

0

3.00e+01

1.19e+01

–

–

8

0

0

2.62e+01

1.17e+01

0.2

0.03

16

0

0

1.03e−00

4.63e−01

4.7

4.7

\(R_{e} = 10^{3}\)

      

4

0

0

1.84e+01

8.95e+00

–

–

8

0

0

1.16e+01

4.85e+00

0.6

0.8

16

0

0

4.95e+00

8.42e−01

1.2

2.5

\(R_{e} = 10^{4}\)

      

4

0

0

1.80e+01

8.84e+00

–

–

8

0

0

1.14e+01

4.75e+00

0.6

0.8

16

0

0

4.86e+00

8.43e−01

1.2

2.5