TY - JOUR
TI - Flow visualization and study of CHF enhancement in pool boiling with Al2O3 - Water nano-fluids
AU - Hegde1 Ramakrishna N
AU - Rao Shrikantha
AU - Reddy Ranapratap
JN - Thermal Science
PY - 2012
VL - 16
IS - 2
SP - 445
EP - 453
PT - Article
AB - Pool boiling heat transfer characteristics of Al2O3-Water nanofluids is  studied experimentally using a NiCr test wire of 36 SWG diameter. The  experimental work mainly concentrated on i) change of Critical Heat Flux(CHF)  with different volume concentrations of nanofluid ii) flow visualization of  pool boiling using a fixed concentration of nanofluid at different heat flux  values. The experimental work revealed an increase in CHF value of around 48%  and flow visualization helped in studying the pool boiling behaviour of  nanofluid. Out of the various reasons which could affect the CHF enhancement,  surface roughness plays a major role in pool boiling heat transfer.