Thermal and Fluid Flow Performance Analysis of Tubular Microchannel Heat Sinks with Inward Protrusions and Nanofluids

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dc.contributor.authorFetuga, I.A.
dc.contributor.authorOlakoyejo, O.T.
dc.contributor.authorSiqueira, A.M.O.
dc.contributor.authorGbegudu, J.K.
dc.contributor.authorAdeyemi, E.A.
dc.date.accessioned2022-09-07T07:50:14Z
dc.date.available2022-09-07T07:50:14Z
dc.date.issued2022
dc.descriptionScholarly articleen_US
dc.description.abstractIn this work, the application of protrusions and nanofluids to improve the performance of tubular-microchannel heat sink (MCHS) is proposed and investigated computationally. The three-dimensional Navier-Stokes and energy equations were solved numerically using the finite volume method incorporated into the ANSYS (Fluent) software package. The effects of different types of nanofluid (Al2O3, CuO, ZnO in pure water), the volume fraction of the nanoparticles (0% to 4%) and height of the protrusion (2 μm−6 μm) on microchannel heat sinks were investigated under the steady-state condition and Reynold numbers (400−2 000) with constant heat flux of 9×106 W/m2. It was revealed that thermal performance improved as protrusion height increased. At 𝑅𝑒=2 000, for Al2O3 nanofluid (NAN) with a volume fraction (∅) of 4% and a protrusion height (H) of 2 μm to 6 μm yielded a thermal performance value of 1.59, 1.68, 1.77, 1.86, and 1.96 times that of MCHS without the protrusion, respectively. In addition, at a volume fraction of 4%, protrusion height of 6 μm and Reynolds number of 800, the Al2O3, CuO and ZnO nanofluids yielded a thermal performance value of 1.79, 1.08, and 1.07 times that of pure water, respectively. Furthermore, at a Reynolds number of 400 and a volume fraction of 4%, the Al2O3–water nanofluid reduced the maximum temperature of the MCHS wall by 4%, whereas CuO- and ZnO-nanofluids decreased the MCHS wall maximum temperature by 0.5% and 0.48% when compared to pure water, respectively. However, for all the cases of volume fraction (1% to 4%), there was an increase trend in the value of thermal performance for the Reynolds number range of 400≤𝑅𝑒≤800, and decrease with the Reynolds number range of 800≤𝑅𝑒≤2 000.en_US
dc.identifier.citationFetuga, I. A., Olakoyejo, O. T., Siqueira, A. M. O., Gbegudu, J. K., and Adeyemi, E. A. (2022). Thermal and Fluid Flow Performance Analysis of Tubular Microchannel Heat Sinks with Inward Protrusions and Nanofluids. The Journal of Engineering and Exact Sciences, 8(5), 14233–01een_US
dc.identifier.urihttps://ir.unilag.edu.ng/handle/123456789/11336
dc.language.isoenen_US
dc.publisherFederal University of Viçosa, Brazilen_US
dc.relation.ispartofseriesThe Journal of Engineering and Exact Sciences;8(5)
dc.subjectSimulationen_US
dc.subjectProtrusionen_US
dc.subjectNanofluidsen_US
dc.subjectMicrochannel Heat Sinken_US
dc.subjectThermal Performanceen_US
dc.subjectResearch Subject Categories::TECHNOLOGY::Engineering mechanicsen_US
dc.titleThermal and Fluid Flow Performance Analysis of Tubular Microchannel Heat Sinks with Inward Protrusions and Nanofluidsen_US
dc.typeArticleen_US
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