Influence of regular inserts and aluminium oxide nanoparticles on micro finned tube over heat transfer and hydraulic performance under laminar flow

Suspension of nanoparticle in the base fluid appears to be the best method in enhancing the rate of heat transfer in any thermal application. The present study deals with the experimental investigation on the influence of regular inserts and aluminium oxide nanoparticles on micro finned tube over heat transfer and hydraulic performance under laminar flow. Results revealed that the influence of nanoparticle with the base fluid at higher loading enhanced the convective heat transfer and lowered the friction characteristics. Similarly, at higher flow rates the heat transfer characteristics increases and friction decreases. It is also found that the thermal performance enhancement characteristics decreases with higher flow rates and increases with higher particle loading. It is also inferred that the enhancement of Nusselt number and PEC is not only due to the addition of nanoaprticle also due to the twisted tape inserts.