TY - GEN
T1 - Experimental study on quenching of a small metal sphere in nanofluids
AU - Kim, H.
AU - Buongiorno, J.
AU - Hu, L. W.
AU - McKrell, T.
AU - DeWitt, G.
PY - 2009
Y1 - 2009
N2 - The objective of this research is to systematically investigate the quenching characteristics of a hot sphere in nanofluids. The experiments are carried out with a small (9.5 mm) stainless steel sphere with initial temperatures near 1000 °C. Alumina nanofluids and deionized water are tested at low volume concentrations (less than 0.1 % by volume) and saturated conditions (100°C). The results show that the quenching behavior in nanofluids is nearly identical to that in pure water. Moreover it is found that some nanoparticles accumulate on the sphere surface during the quenching process. Such accumulation of nanoparticles on the surface promotes the destabilization of the vapor film in subsequent quenching experiments, thus accelerating the return to nucleate boiling at higher temperature than that in the clean surface case.
AB - The objective of this research is to systematically investigate the quenching characteristics of a hot sphere in nanofluids. The experiments are carried out with a small (9.5 mm) stainless steel sphere with initial temperatures near 1000 °C. Alumina nanofluids and deionized water are tested at low volume concentrations (less than 0.1 % by volume) and saturated conditions (100°C). The results show that the quenching behavior in nanofluids is nearly identical to that in pure water. Moreover it is found that some nanoparticles accumulate on the sphere surface during the quenching process. Such accumulation of nanoparticles on the surface promotes the destabilization of the vapor film in subsequent quenching experiments, thus accelerating the return to nucleate boiling at higher temperature than that in the clean surface case.
UR - http://www.scopus.com/inward/record.url?scp=70349137567&partnerID=8YFLogxK
U2 - 10.1115/IMECE2008-67788
DO - 10.1115/IMECE2008-67788
M3 - Conference contribution
AN - SCOPUS:70349137567
SN - 9780791848715
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings
SP - 1839
EP - 1844
BT - 2008 Proceedings of ASME International Mechanical Engineering Congress and Exposition, IMECE 2008
T2 - 2008 ASME International Mechanical Engineering Congress and Exposition, IMECE 2008
Y2 - 31 October 2008 through 6 November 2008
ER -