1. Department of Mechanical Engineering, Indian Institute of Technology, Banaras Hindu University, Varanasi 221005, India e-mail: ;
2. Fluid Power and Tribology Section, Refueling Technology Division, Hall 3, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
3. Department of Mechanical Engineering, Indian Institute of Technology, Banaras Hindu University, Varanasi 221005, India