In this study, the least square method (LSM) and the Galerkin method (GM) are used to simulate flow and heat transfer of nanofluid flowbetween two parallel plates. One of the plates is externally heated, and the other plate, inwhich coolant fluid is injected through it, expands or contractswith time. The fluid in the channel iswater containing different nanoparticles (Cu, Ag and Al2O3). The effective thermal conductivity and viscosity of the nanofluid are calculated by the Maxwell–Garnetts (MG) and Brinkman models, respectively. The effects of the nanoparticle volume fraction, Reynolds number, expansion ratio and power law index on flow and heat transfer are investigated. The results showthat the Nusselt number increaseswith an increase of the nanoparticle volume fraction and Reynolds number. Also it can be found that in order to reach the maximumNusselt number, copper should be used as a nanoparticle.
کلید واژگان :Nanofluid Porous channel Heat transfer Expansion ratio GM LSM
ارزش ریالی : 600000 ریال
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