Turbulent Natural Convection Heat Transfer in Nano Fluids with Thermal Stratification - An Experimental Study

Turbulent Natural Convection Heat Transfer in Nano Fluids with Thermal Stratification - An Experimental Study

Prasad L.S.V. Subrahmanyam T. Sarma P.K.Dharma Rao V. Sharma K.V. 

College of Engineering, Andhra University, Visakhapatnam 530 003, India

College of Engineering, GITAM University, Visakhapatnam 530 045, India

GVP College of Engineering (A), Visakhapatnam 530 048, India

Corresponding Author Email: 
30 June 2013
| Citation



The natural convection heat transfer characteristics of nanoparticles dispersion in demineralised water is investigated for different volume fractions of three nanoparticles. Heat transfer data for the sample nanofluids in transition and turbulent zones of natural circulation flow are measured. The effects of factors such as volume fraction Ø, thermo physical properties of suspended nanoparticles and thermal stratification S on heat transfer are discussed further. The experimental data indicate a decrease in natural convection heat transfer when nanoparticles are added to water. A non-dimensional equation using the experimental data is developed for the estimation of Nusselt number as a function of Rayleigh number. Natural Convection - Heat Transfer - Nano fluids [CuO,.


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