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Abstract

In this study ,the fluid flow of the Al2O3 nano fluid in a horizontal pipe equipped with twin twist tape insert has been numerically studied .Different values of twisting ratio (y/w) of 2 ,4 and 6 with volume concentration) of 0.5% and 4 % are investigated under Reynolds number range of 5000 to 35000. The object of this project is to augment the transfer of heat in a tube by employing the combined influence of double twisting tape with nano fluid .The Navier – Stockes and energy equations as well to the turbulence model are desired for modeling this physical problem. ANSYS Fluent code is utilized to gain the results .The numerical consequence explained that the Nusselt number (Nu) , friction factor (f), and overall thermal performance factor raises as twisting ratio decreases . The results also display that the twin twisting tape more effective than a plain tube for heat transfer augmentation. This increase is improved with increasing volume concentration.