k
grid size
Mittal [21] 
Mittal [21] 
Khater [23] 
Khater [23] 
0.005
4.9586e−007
5.9234e−007
4.9688e−008
4.6512e−008
1.19e−007
8.94e−008
0.0005
6.1723e−007
6.6123e−007
6.2171e−009
5.9068e−009
8.05e−007
7.45e−007
0.0001
2.1132e−008
3.1324e−008
2.5318e−009
2.188e−009
....
....
0.0001
1.2654e−008
2.2131e−008
1.8750e−009
1.0101e−009
...
...