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Theory and Modern Applications

Table 9 Numerical results of three-dimensional parabolic problem at \(t=0.1\) with \(x=0.5\) and \(y=0.5\) for Example 6

From: A new high-order compact finite difference scheme based on precise integration method for the numerical simulation of parabolic equations

 

N

11 × 11 × 11

21 × 21 × 21

41 × 41 × 41

81 × 81 × 81

Taylor

Max(error)

6.781 × 10−7

1.946 × 10−9

1.220 × 10−11

1.439 × 10−13

CPU (s)

0.265

0.280

0.272

0.308

Order

8.445

7.332

6.406

Padé

Max(error)

6.781 × 10−7

1.874 × 10−9

5.995 × 10−11

7.191 × 10−11

CPU (s)

0.270

0.276

0.278

0.288

Order

8.500

4.966

−0.262