Original

Heat and Mass Transfer

, Volume 39, Issue 8, pp 775-784

Natural convection of nano-fluids

  • Nandy PutraAffiliated withInstitut für Thermodynamik, Universität der Bundeswehr Hamburg, 22039 Hamburg, Germany
  • , Wilfried RoetzelAffiliated withInstitut für Thermodynamik, Universität der Bundeswehr Hamburg, 22039 Hamburg, Germany Email author 
  • , Sarit K. DasAffiliated withHeat Transfer and Thermal Power Lab, Mechanical Engineering Dept. Indian Institute of Technology, Madras, India 600036

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access

Abstract

Fluids with nano size solid particles suspended in them have been given the name nano-fluid which in recent studies have shown tremendous promise as heat transfer fluids. However, before suggesting such fluids for applications a thorough knowledge of physical mechanism of heat transfer in such fluids is wanted. The present study deals with one such aspect of natural convection of nano fluids inside horizontal cylinder heated from one end and cooled from the other. An apparently paradoxical behaviour of heat transfer deterioration was observed in the experimental study. Nature of this deterioration and its dependence on parameters such as particle concentration, material of the particles and geometry of the containing cavity have been investigated. The fluid shows characters distinct from that of common slurries.