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Theory and Modern Applications

Table 4 Accuracies in solution values with quasi-variable 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

6.75

1.15

1.18e−02

9.94e−03

–

–

8

0.70

0.60

1.08e−03

4.41e−04

4.1

4.5

16

0.12

0.10

8.65e−05

2.05e−05

3.6

4.4

\(R_{e} =10\)

      

4

6.75

1.15

1.77e−02

9.74e−03

–

–

8

0.70

0.60

1.08e−03

4.41e−04

4.0

4.5

16

0.12

0.10

8.65e−05

2.05e−05

3.6

4.4

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

      

4

6.75

1.15

3.24e−02

2.38e−02

–

–

8

0.70

0.60

1.08e−03

4.41e−04

4.9

5.8

16

0.12

0.10

8.55e−05

2.02e−05

3.7

4.4

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

      

4

6.75

1.15

1.36e−02

8.63e−03

–

–

8

0.70

0.60

1.08e−03

4.41e−04

3.7

4.3

16

0.12

0.10

7.57e−05

1.86e−05

3.8

4.6