The effect of nanofluids flow on mixed convection heat transfer over microscale backward-facing step
作者： A.Sh. Kherbeet , H.A. Mohammed , B.H. Salman
DOI: 10.1016/J.IJHEATMASSTRANSFER.2012.05.084
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摘要: Abstract Laminar mixed convection flow over a 2D horizontal microscale backward-facing step (MBFS) placed in duct is numerically investigated. The governing equations along with the boundary conditions are solved using finite volume method (FVM). upstream wall and considered adiabatic, while downstream heated by uniform heat flux. straight of maintained at constant temperature that higher than inlet fluid temperature. Different types nanoparticles such as Al2O3, CuO, SiO2 ZnO, fractions range 1–4% used. diameter was 25 nm ⩽ dp ⩽ 70 nm. expansion ratio 2 height 0.96 μm. Reynolds number 0.05 ⩽ Re ⩽ 0.5. results revealed Nusselt increases increasing fraction number. nanofluid observed to have highest value. It also found decrease nanoparticle diameter. However, there no recirculation region duct.
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