Rabia Sabir - Academia.edu (original) (raw)
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Papers by Rabia Sabir
Nanofluids (suspensions of nanosize metallic particles in fluid) are center of interest in heat t... more Nanofluids (suspensions of nanosize metallic particles in fluid) are center of interest in heat transfer enhancement research but inconsistency reports in mechanism and extent of heat transfer enhancements limits their practical applications. This work is concerned with experimental analysis of convective heat transfer enhancement of gold/water nanofluid in laminar flow under constant heat flux condition. Nanofluid of different concentrations was prepared by one step laser ablation method. Results showed enhancement in heat transfer coefficient up to 8%, 15% and 23% with 0.00015, 0.00045 and 0.000667 volume fraction of nanoparticles simultaneously. Heat transfer coefficient and Nusselt number also increases by increasing concentration and Reynolds's number and well known shah correlations failed to predict that much enhancement. Possible heat enhancement mechanisms are also discussed such as particle migration, Brownian motion, high effective thermal conductivity and enhanced th...
Nanofluids (suspensions of nanosize metallic particles in fluid) are center of interest in heat t... more Nanofluids (suspensions of nanosize metallic particles in fluid) are center of interest in heat transfer enhancement research but inconsistency reports in mechanism and extent of heat transfer enhancements limits their practical applications. This work is concerned with experimental analysis of convective heat transfer enhancement of gold/water nanofluid in laminar flow under constant heat flux condition. Nanofluid of different concentrations was prepared by one step laser ablation method. Results showed enhancement in heat transfer coefficient up to 8%, 15% and 23% with 0.00015, 0.00045 and 0.000667 volume fraction of nanoparticles simultaneously. Heat transfer coefficient and Nusselt number also increases by increasing concentration and Reynolds's number and well known shah correlations failed to predict that much enhancement. Possible heat enhancement mechanisms are also discussed such as particle migration, Brownian motion, high effective thermal conductivity and enhanced th...