Open AccessInfluence of nanoparticles deposition on surface roughness and heat transfer characteristics of nanofluids – A review
Author(s) -
Mercy Ogbonnaya,
Oluseyi O. Ajayi,
M.A. Waheed,
Sunday Olayinka Oyedepo,
A. P. I. Popoola,
Olawale Popoola
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/331/1/012018
Subject(s) - nanofluid , materials science , heat transfer , critical heat flux , heat transfer coefficient , thermal conductivity , wetting , surface roughness , deposition (geology) , heat flux , heat exchanger , boiling , nanoparticle , dynamic scraped surface heat exchanger , chemical engineering , enhanced heat transfer , thermodynamics , composite material , nanotechnology , paleontology , physics , sediment , biology , engineering
The inherent low thermal conductivity of working fluids used in transferring heat from energy system makes the performance of the system less efficient. The introduction of nanoparticles into the working fluid enhances the thermal conductivity of the fluid, thereby improving the overall performance of the energy system. Deposition of nanoparticles on the heat transfer surface of the heat exchanger occurs and this affects the mechanism of bubble formation, wettability, surface roughness of the heating surface and the overall heat transfer coefficient. In this review, the use of nanofluid showed improvement in the critical heat transfer flux (CHF) of the heat transfer fluid while the deposition of nanoparticles on the heater surface enhanced the wettability for pool boiling but caused deterioration in the heat transfer. The influence of nanoparticles deposition on surface characteristics and heat transfer coefficient during single and two phase flows in flow boiling needs to be further investigated.