Shiraz University Iranian Journal of Science and Technology Transactions of Mechanical Engineering 2228-6187 39 M2 2015 10 01 USING MULTI-WALL CARBON NANOTUBE (MWCNT) BASED NANOFLUID IN THE HEAT PIPE TO GET BETTER THERMAL PERFORMANCE 325 335 3243 10.22099/ijstm.2015.3243 EN Y. Bakhshan Dept. of Mechanical Engineering, University of Hormozgan, P.O.Box 3995, I. R. of Iran A. Hajhosseini Dept. of Mechanical Engineering, University of Hormozgan, P.O.Box 3995, I. R. of Iran Journal Article 2013 12 29 In this study, thermal performance of a cylindrical heat pipe is investigated numerically. Three different types of water based nanofluids, namely (Al2O3+Water), (Diamond+Water) and (Multi-Wall Carbon Nano tube (MWCNT) +Water) have been used. The influence of using the simple nanofluids and MWCNT nanofluid on the heat pipe characteristics such as liquid velocity, pressure profile, temperature profile, thermal resistance and heat transfer coefficient of heat pipe have been studied. A new correlation developed by Bakhshan and Saljooghi, for viscosity of nanofluids has been implemented. The results show good agreement with the available analytical and experimental data. Also, the MWCNT based nanofluid has lower thermal resistance, higher heat transfer coefficient and lower temperature difference between evaporator and condenser sections, so it has good thermal specifications as a working fluid for use in heat pipes. The prepared code has capability for parametric studies also. https://ijstm.shirazu.ac.ir/article_3243_05cea51a017e5d9d02f0c87643ba3507.pdf