Grid size

Value of the maximum convective Nusselt number

Value of the maximum radiative Nusselt number

100 × 15 × 15

22.351

-

160 × 20 × 20

26.354

16.738

240 × 25 × 25

29.172

18.957

300 × 30 × 30

31.259

20.554

360 × 36 × 36

32.183

21.275

420 × 40 × 40

32.301

21.352