Comparison Of Laminar And Turbulent Model Of Nanofluid Flow In Microchannel

Hamzah, Muhammad Haziq (2018) Comparison Of Laminar And Turbulent Model Of Nanofluid Flow In Microchannel. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

Text (24 Pages) Comparison Of Laminar And Turbulent Model Of Nanofluid Flow In Microchannel.pdf - Submitted Version Download (275kB)

Abstract

This study compared the nanofluid flow and heat transfer in microchannel using laminar and turbulence model.The simulations work is done using ANSYS and Fluent softwares.The nanofluid used is alumina,Al2O3 with 100nm size particles and 1% volume concentrations as the cooling fluid.The heat sink for the rectangular microchannel consists of 1 cm2 silicon wafer.The channel size is 180μm,width 57μm with the length 10mm.This microchannel are separated by the 43μm gap.The simulations performance is to evaluate fluid flow and heat transfer in terms of temperature profile,heat transfer,velocity profile,entrance length and Nusselt number for both laminar and k-ɛpsilon model.From the simulations results,the temperature rises along from the inlet to the outlet of the channel.The higher temperature are predicted at the heat sink top wall at the channel outlet.The temperature increases the linearly along the channel for the solid and fluid regions.At the channel inlet,the higher value for the Nusselt number is predicted,then decrease until approaching constant value. The entrance lengths for the k-ɛpsilon model is shorter compared to the laminar model due to the early fully developed.The velocity gradient for laminar much higher compared turbulence.The percentage error of entry length are predicted between laminar and turbulence models which are 18.23% and 4.6% respectively.The percentage deviation of Nusselt number between laminar and turbulence models are predicted to be 146.77% and 28.75% respectively.

Actions (login required)

View Item