Abstract
The numerical study of a microchannel's flow and heat transfer characteristics with an elastic micropillar array. In addition, the effects of elastic micropillar dynamic properties, aspect ratio, spacing, and modulus of elasticity on fluid heat transfer performance, hydrodynamic friction factor, and overall hydrothermal efficiency are investigated. The results indicate that elastic micropillars in flapping mode can generate periodic vortices more conducive to disrupting the boundary layer and mixing heated and cold fluids, thereby enhancing heat transfer. The heat transfer effect of the elastic micropillar is enhanced by 10.84% compared to rigid ones. The elastic micropillar array has the best aspect ratio of 11 and the best spacing of 1.9D. Under the optimum working condition, at the expense of high mechanical loss, the heat transfer performance of the fluid can be improved by 59.35%, and the total hydrothermal efficiency can be increased by 17.7%.
Published Version
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