Author/Authors :
Mohsen Mansouri Department of Energy, Material and Energy Research Center (MERC) Meshkindasht, Karaj, Iran , Amirhosein Zamzamian Department of Energy, Material and Energy Research Center (MERC) Meshkindasht, Karaj, Iran , Arya Shafiefarhood Department of Energy, Material and Energy Research Center (MERC) Meshkindasht, Karaj, Iran , Omid Tavakoli Department of Energy, Material and Energy Research Center (MERC) Meshkindasht, Karaj, Iran , Milad Tajik Department of Energy, Material and Energy Research Center (MERC) Meshkindasht, Karaj, Iran
كليدواژه :
Sedimentation , Nanoparticles , Thermal Conductivity , SiO2 Nanofluids
چكيده لاتين :
Nanofluid is defined as conventional fluid with suspended particles at nanometer size (normally
below 100 nm) in it. These fluids possess great potential for heat transfer enhancement. Some of
the main issues related to nanofluids and their preparation are stability, particle sedimentation and
clustering. In this study effect of parameters such as base fluid, particle size and concentration on
nanofluid stability and effect of particle sedimentation through time from nanofluid preparation on
its thermal conductivity have been investigated. For example the amount of thermal conductivity
of sample with 3% valume fraction SiO2 in the base fluid with initial value 0/415 w/m.k is decrese
to 0/365 w/m.k. Also results showed that nanofluid thermal conductivity reduction caused by
particle sedimentation decrease with increase in particle size and concentration
