TY - JOUR
TI - Heat transfer enhancement in rotating disk boundary layer
AU - Mehmood Ahmer
AU - Usman Muhammad
JN - Thermal Science
PY - 2018
VL - 22
IS - 6
SP - 2467
EP - 2482
PT - Article
AB - A generally admitted fact about the nanofluids is the expedition of heat  transfer process in comparison to pure fluids. The calculation of enhanced  rate of heat transfer depends strongly upon the nanofluid modeling. Following  the experimental evidence most of the researchers assume the nanofluid to be  a homogeneous mixture. However, this is a severe condition that results in  underprediction of heat transfer rates. Due to the ongoing convection  phenomena the nanoparticle concentration is actually non-homogeneous within  the boundary layer because of the presence of concentration gradients. The  objective of this study is to calculate the heat transfer enhancement in  three dimensional boundary layer when the working fluid is a nanofluid. The  rotating disk geometry, which perhaps serves as the bench mark for the three  dimensional boundary layers, have been chosen for the purpose here. The  non-homogeneous nanofluid modeling has been utilized and a percent increase  in Nusselt number has been calculated. Detailed analyses of flow and heat  transfer phenomena for nanofluids have been conducted under the influence of  several physical parameters.