Hybrid Nanofluids Flow over a Vertical Cylinder with Heat Source/Sink and Prescribed Surface Heat Flux
DOI:
https://doi.org/10.11113/mjfas.v20n2.3249Keywords:
Heat Source/Sink, Stretching Cylinder, Hybrid Nanofluids, Heat Flux, Dual Solutions, Stability AnalysisAbstract
This work presents the steady mixed convection in Al2O3-Cu/water hybrid nanofluids along a vertically stretching/shrinking cylinder with the prescribed surface heat flux and the effects of heat source/sink. The governing hybrid nanofluids model was simplified using a similarity transformation. The bvp4c solver in MATLAB software is used to solve the hybrid nanofluids flow problem numerically. It is observed that two outcomes are feasible for the assisting and opposing flow regions as well as stretching and shrinking cases . Besides that, the effects of the dimensionless parameters are analyzed graphically and tabularly. In particular, the critical point is reduced by 3% when the curvature parameter goes from 0 to 0.1 and from 0.1 to 0.2 when the cylinder is stretched. This means that the higher curvature parameter could delay the process of separating the boundary layer. It is noted that the positive heat source will decrease the fluid motions and reduce the shear stress on the surface. Moreover, Al2O3-Cu/water hybrid nanofluids have better performance in heat transfer and velocity of fluid flow than Al2O3/water nanofluids.
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