The effect of semi-attached and offset mid-truncated ribs and Water/TiO2 nanofluid on flow and heat transfer properties in a triangular microchannel

In this study, the effect of dimensions of a new design of ribs on heat transfer parameters and laminar flow of the nanofluid Water-TiO2 has been investigated. The inventive design of the ribs has been simulated in the form of semi-attached and offset mid-truncated ribs in a 3D microchannel with triangular cross-section. The offset mid-truncated ribs design also exercises less prevention-where the ribs are located for the fluid flow. The semi-attached and offset mid-truncated ribs have been located inside the channel to improve heat transfer and the effects of the dimensions and the number of the ribs have been studied. In this study, the base fluid is Water while the effect of volume fraction of the nanoparticle (TiO2.) on heat transfer and physical properties of the fluid is investigated. The results indicate that the ribs affect the physics of the fluid whose effect greatly depends on the Reynolds number of the flow. (C) 2017 Published by Elsevier Ltd.