Date : 13/07/2020
IIT BombayInterview Experience #PhdThermo-fluid Engineering Total Duration : 30 min
1. Brief Introduction
2. Area of interest…Have u went through professor’s profile?Ans : Turbulence Modelling and it’s application
3. What is Turbulence and how it is different from Laminar flow?
4. Why Turbulence Modelling is competitive in nature?…Can u explain what are time and length scales associated with that?
5. Approaches of solving turbulence problem and how they are different? Which one gives best results?
6. What do you mean by closure problem in Turbulence?
7. In RANS, when you are doing averaging with space or time ? Why ?
8. Two different pipes, water flowing at 50 degree with same velocity. Outside air temperature is 25 degree. Dia of pipes are 5 mm and 10 mm…(same length)In which case water will leave with least temperature ? In that two cases a) assume Laminar flow in both b) assume turbulent flow in high dia pipe and laminar in small pipe. How will you design shell and tube heat exchanger with oil flowing through this pipe and surrounded with water? All the best.Thank you.