Table 4.

Eq [%] for the results obtained with the CG method with adjoint operator and the Tikhonov regularization for a tube made of sapphire, considering prescribed temperature boundary conditions

ApMethodσ = 0.1 K
Prescribed temperature at z = 0 and z = L
2,0001.2CG method17.77
Tikhonov (Cattani et al., 2019)19.40
   
3,000CG method14.99
Tikhonov (Cattani et al., 2019)15.30
   
4,000CG method13.90
Tikhonov (Cattani et al., 2019)13.60
   
5,000CG method13.16
Tikhonov (Cattani et al., 2019)12.80

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