NUMERICAL INVESTIGATION OF COOLING A RIBBED MICROCHANNEL USING NANOFLUID

Year 2018, Volume: 4 Issue: 6, 2408 - 2422, 29.09.2018

Khadija Madani

https://doi.org/10.18186/thermal.465650

Cited By: 6

Abstract

A 2-D numerical investigation was carried out to study
the effect of spacing between ribs on nanofluid flow and heat transfer inside a horizontal micro-channel. Two
identical ribs were placed at the lower wall of micro-channel with variable
spacing between them. The alumina oxide nanoparticles was suspended in water as
based fluid at different volume fraction 0, 2 and 4%. The finite volume method
was used to solve the continuity, momentum and energy equations. The effects of
different parameters such as nanoparticles volume fraction, Reynolds number,
and the spacing between ribs has been evaluated. The results showed that increasing nanoparticles volume fraction and
Reynolds number significantly enhanced the heat transfer and the Poiseuille
number. The presence of ribs improves the heat
transfer. However, increasing the spacing between ribs leads to decrease the
heat transfer rate.   

Keywords

Forced Convection, Heat Transfer Coefficient, Nanofluids, Ribs

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