Table 2: Values of when and comparison with previous work.

Grubka and Bobba [7] Ali [9] Elbashbeshy [11] Ishak et al. [24]Present study
NumericalAnalytical

0.720.80860.80580.81610.80860.80860.8086
1.001.00000.99611.00001.00001.00001.0000
3.001.92371.91441.92371.92371.9234
10.03.72073.72063.72023.72073.72073.7205