1. Department of Mathematics National Institute of Technology Rourkela Rourkela 769008 India
2. Mechanical Engineering Department Faculty of Engineering Shahid Chamran University of Ahvaz Ahvaz, P.O. Box 61357‐43337 Iran
3. Drilling Center of Excellence and Research Center Shahid Chamran University of Ahvaz P.O. Box, 61357‐43337 Ahvaz Iran