In the present paper, several experimental and theoretical studies conducted on the thermal conductivity of
nanofluids are represented and investigated. Based on the reviewed studies, various factors affect thermal conductivity
of nanofluids such as temperature, the shape of nanoparticles, concentration and etc. Results indicated
the increase in temperature and concentration of nanoparticles usually leads to the higher thermal conductivity
of nanofluids. In addition, it is concluded that there are some novel approaches in order to obtain nanofluids with
more appropriate thermal properties including using binary fluids as the base fluid or utilizing hybrid nanofluids.
