1. Centre for Differential Equations, Continuum Mechanics and Applications, School of Computational and Applied Mathematics; University of the Witwatersrand; Johannesburg South Africa
2. Mechanical Engineering Department; Engineering Faculty of Bu-Ali Sina University; Hamedan Iran
3. Young Researchers and Elites Club, Hamadan Branch; Islamic Azad University; Hamadan Iran
4. Department of Mechanic, Hamadan Branch; Islamic Azad University; Hamadan Iran